maximum allowable impervious surface area

TOSL. What is floor area? The request is for approval of a deviation from the maximum allowable impervious surface limit. Building & Planning | IV. FT. BENSALEM TOWNSHIP Building and Planning Department 2400 Byberry Road Bensalem PA 19020 215-633-3644 FAX 215-633-3653 . IV. ft. would be allowed up to 55% impervious surface. Because of historical subdivision patterns, there are also some sites (e.g. Surfaces with materials such as gravel, permeable pavers, or permeable concrete are still In short, it is a built surface that won't absorb rainfall, including roads, driveways, buildings, and concrete. Example . Lots greater than 12,000 sq. Distribution of the allowable impervious area among the platted lots shall be recorded on the face of the plat. Impervious surface under existing (2005) conditions 2. M - F (holidays excluded) 8:00 a.m - 12:00 p.m. and 1:00 p.m. - 3:00 p.m. All Rights Reserved. Once this limit is reached with the impervious surface area, no … The maximum allowable gross floor area for summarize impervious surface areas and percents by land use zoning district and watershed. When you are buying land, a townhome or a detached home it is important that you get an updated survey before closing. The city also has maximums for building coverage, defined as the area of a lot covered by buildings or roofed areas, with some exceptions. Categories R-1 R-2 R-3 C-1 Maximum Allowable IMPERVIOUS SURFACE AREA (ISA) “ percentage of the maximum allowable floor area of any paved, tiled or hardscaped surface at the ground floor in relation to the TLA. In the Pacific Northwest, for instance, the maximum allowable impervious surface area ranges from around 15 to 35 percent of the total parcel (depending on how the city or county has zoned the property). the total open space required for each type of use or occupancy for a given lot. Town Government, 765 Portola Road When you are buying land, a townhome or a detached home it is important that you get an updated survey before closing. How Impervious Areas Affect the Environment Large amounts of impervious surfaces change the water cycle. These surfaces include concrete, asphalt, bricks, paving stones, swimming pools, "turf stone," plastic sheeting, compacted gravel and rock areas, any gravel or decomposed granite areas/paths wider than 4', corrals, and similar surfaces. 3. CALCULATING FLOOR AREA LIMITATIONS –OUTBUILDINGS An area of a building that has a ceiling height of 7' or greater will count as floor area. Minimum sizes of rooms and their least horizontal dimensions shall be as follows: Rooms for human habitation “ 6.00 sq.m. Every home under his jurisdiction that’s not in a watershed has an impervious surface limit of 30 percent, meaning only a third of the property can be covered by a hard surface. ISA. The Zoning Ordinance does allow for second units on parcels of one acre or larger. Allowed Height of Buildings/Structures 1. Additionally, the amount of adjustment provided for green roofs and porous pavement shall be limited to the surface area of these PSO. ft. would be allowed up to 60% impervious surface. Lot Area B. (Table VIII.4.1). Tier I: Up to 1,999 square feet of impervious surface; Tier II: 2,000 to 2,999 square feet of impervious surface; Tier III: 3,000 to 4,999 square feet of impervious surface; Tier IV: 5,000 or more square feet of impervious surface It does not include areas that are part of permitted stormwater controls; the open surface water such as swimming pools; a surface of 57 stone, as … MAXIMUM IMPERVIOUS SURFACE & MAXIMUM BUILDING COVERAGE CALCULATION SHEET ... A. The upper limit on residential lots is 30% impervious; however, subdivisions may range from 6% to 30% impervious depending on the level of stormwater treatment installed during development. Impervious surfaces are an environmental concern because, with their construction, a chain of events is initiated that modifies urban air and water resources: . Lots greater than 12,000 sq. No building shall be enlarged so that the dimensions of the required court or yard would be less than what is prescribed for such building lot. Impervious surfaces on a lot include, but are not limited to, building driveways, garage, porches, patios, private walks, accessory building, and any other impervious surfaces constructed on the lots. The maximum allowable amount of impervious surface within a proposed development is limited based upon the Low or High Density Option, and differs from Watershed to … METHODS Methods for calculating the anticipated impervious surface coverage under each of the alternatives were based on those developed for the 2006 Draft Comprehensive Plan … impervious surface area. When calculating maximum allowable lot coverage, include all impervious surfaces, such as roof areas of primary and accessory buildings, impervious decks, patios, sidewalks, driveways and access easements. ft. would be allowed up to 60% impervious surface. For Residents | to compute the maximum square footage of impervious surface allowed on a lot, multiply the percentage allowed in your zoning district by the total square footage of the lot (example: a lot measuring 7200 sq. C. Square footage of carport/garage. All Rights Reserved. This is the percentage of total area managed by BMPs: 950 square feet ÷ 1,000 square feet = 95% Step 3: Multiply the percentage found in Step 2 by the maximum allowable discount of 55%: 95% × 55% = 52.3% Environmental effects. Maximum Allowable Construction Area (MACA) “ the combined total of the Maximum Allowable PSO and the Maximum Allowable ISA. ft. would be allowed 50% impervious surface. Again, the remaining 15% of the allowed maximum floor area allows for construction of desired accessory structures. means the maximum area of a single building site that impervious surfaces may occupy. Where both lot- and plat-specific impervious limits apply, the more … It matters because the City of Austin has maximum amounts of impervious cover allowable on a lot. The additional 15% of the allowed floor area for the lot allows for accessory structures (i.e., cabana, pool house, shed, guest house, etc.). BULL AND WEST BULL CREEK WATERSHED MANAGEMENT STUDY A CONCEPTUAL PLAN TO IMPLEMENT LOW-IMPACT DEVELOPMENT SOLUTIONS FOR BULL CREEK NOVEMBER 2003 PREPARED FOR: City of Austin, Texas Watershed Protection and Development Review Department P.O. On these small sites a lack of control on impervious surfaces may have detrimental effects as outlined above. Impervious Surface Existing Ft2 Proposed Ft2 Total Ft2 Lot Area Ft2 Impervious Surface Ratio Buildings + Other Impervious Surface Percentage Maximum Allowable 25% + = ÷ = x 100 = LR: Online Permitting Forms 2016: Impervious Surface Calculation Worksheet 04-11 … FT.) Maximum Allowable Adjustment The maximum allowable Adjustment for any individual property shall not exceed the calculated impervious surface such that a negative drainage charge would result. Impervious surface under build-out conditions using maximum allowable impervious surface ratios 3. Buyers sometimes think they do not need one because it is obvious where the property lines are located or they have a copy of an older survey. maximum allowable ISA consists of build-up areas within the lot connected to the main building/structure but without opaque or solid roofing, e.g. 100 101 VIII1 Reference Table of Maximum Allowable PSO Maximum Allowable ISA from ENGINEERIN 1412878 at Technological Institute of the Philippines. The total floor area of all buildings on a lot cannot exceed that lot's adjusted maximum floor area (AMFA). Group A buildings or Residential 1 (R-!) When defining the area of imperviousness, statutory land use planning could make use of the maximum allowable roof square area and/or the maximum allowable amount of impervious surface coverage as well as reduce the need for surfaced passageways by placing the parking space and residential building centrally within the plot. See Article III, Zoning Regulations [3-5.8 (A)] Lot Area Coverage. Impervious surfaces are those surfaces that will not allow or will greatly reduce the penetration of water into the ground. Portola Valley, CA 94028 Why the 85% floor area limitation? Appendix F: Impervious Areas PURPOSE An estimate of impervious surface coverage by sub-basin was conducted to quantitatively measure differences in environmental impacts among proposed land use planning alternatives. Roads and drivewa drivewaysys outside of the develo the developmentpment area have alread area alreadyy been accounted forbeen for,, and therefore will not and therefore will affet the maximum allowable impervious surface within the development area. Impervious surfaces include the building footprint plus all surfaces that prevent rainwater from entering the ground. Maximum Allowable Unpaved Surface Area (USA) “ portion of the lot that … ft. and shall not exceed 40% of the lot size. The water surface area of swimming pools and ponds is not considered as impervious area for the purposes of the calculations in Table 6.05.01 F. 3. The upper limit on residential lots is 30% impervious; however, subdivisions may range from 6% to 30% impervious depending on the level of stormwater treatment installed during development. Floor area is the total area, as measured from exterior walls, for all buildings on a parcel - this includes second stories as well. Maximum Allowable Construction Area (MACA) “ the combined total of the Maximum Allowable PSO and the Maximum Allowable ISA. General. It includes but is not limited to buildings, roofs, solid decks, driveways, parking areas, patios, sidewalks, and compacted gravel areas. Administration, Enforcement, Building Permits & Inspections, Rule 7. A. multiplier numbers 3, 5, 12, 18 and 30 represent the number of storeys. DEVELOPMENT CONTROL PLAN (DCP) FACT SHEET August 2015 Calculating site coverage and floor area limitation. Impervious or Lot Coverage is the area of a lot covered by any impervious surface such as a roof or paving (HDRO 188-3). Define Impervious surface, total allowable coverage. To calculate fees, the you'll segment and classify aerial imagery by land use to calculate the area of impervious … Minimum Requirements for Total Open Spaces within Lot (TOSL). The maximum height and number of storeys of proposed building shall be dependent upon the character of use or occupancy, on the type of construction, on … on the lot divided by the total lot area. For guest parking areas, the Planning Commission has approved a specific paving cell product called GeoBlock, that when used, will only count for 50% of its area as impervious surface, hence providing some relief for properties that are close to reaching their maximum allowed impervious surface area. If exceeded, the Allowable Maximum TGFA must be adjusted since the AMVB must always prevail. Impervious Surface Page 3 Lots up to 9,000 sq. TO COMPUTE THE MAXIMUM SQUARE FOOTAGE OF IMPERVIOUS SURFACE ALLOWED ON A LOT, MULTIPLY THE PERCENTAGE ALLOWED IN YOUR ZONING DISTRICT BY THE TOTAL SQUARE FOOTAGE OF THE LOT (EXAMPLE: A LOT MEASURING 7200 SQ. Exception: Lots may exceed maximum impervious coverage by … It matters because the City of Austin has maximum amounts of impervious cover allowable on a lot. Because impervious surfaces are such a danger, many governments, like the City of Louisville, Kentucky, charge landowners with high amounts of impervious surfaces on their properties. Mezzanine floors shall have a clear ceiling height of not less than 1.80 m above and below it. Box 1088 Austin, Texas 78767 PREPARED BY: PBS&J 6504 Bridge Point Parkway Each zoning district has a maximum impervious surface percentage that is allowed. ft. would be allowed 50% impervious surface. Website Design by Granicus - Connecting People and Government. The subject property is currently allowed a maximum lot coverage of 35% (subject to certain allowances). Allowed Height of Buildings/Structures 1. Environmental effects. All buildings shall face a street or public alley or a private street which has been duly approved. ... MACA. The attached worksheet is provided to assist in the calculation of the allowable Maximum Lot Coverage for your particular lot. Large houses create more impervious surface area, which can increase runoff and cause drainage, landslide, and flooding problems. Impervious Surface means a surface that because of its composition and/or its use impedes the natural infiltration of water. The District can be applied within a specified buffer area or across the entire watershed of a particular waterbody. Impervious cover – Any structure, surface or improvement that reduces and/or prevents absorption of storm water into land. Abutments on the side and rear property lines may be allowed provided that the following requirements are first complied with: Open space as prescribed in Tables VIII.5.1 and VIII.6.1, Window opening as prescribed in Section 10, Firewall with a minimum of two hours fire-resistive rating constructed with a minimum height clearance of 0.40 m above the roof. Lots up to 9,000 sq. For buildings exceeding 14 storeys in height, the required width of the court shall be computed on the basis of 14 storeys. maximum impervious coverage surface calculation sheet all permit applications for building additions, accessory structures, pools, pool decks, decks, dwellings, walkways, driveways, pavers or anything else covering the land must be accompanied by a plot plan indicating all structures and impervious surfaces that exist on the property. The required open space shall be located totally or distributed anywhere within the lot in such a manner as to provide maximum light and ventilation into the building (Fig. Title: Microsoft Word - Maximum Impervious Surface Worksheet Author: jmryan Created Date : … Built-upon area is defined as both impervious and partially impervious cover including buildings, pavement, gravel, recreational facilities (tennis courts, etc.) Maximum Allowable IMPERVIOUS SURFACE AREA (ISA) “ percentage of the maximum allowable floor area of any paved, tiled or hardscaped surface at the ground floor in relation to the TLA. Total Open Space Within Lot (TOSL) “ the total open space required for each type of use. ft. would be allowed up to 55% impervious surface. Eaves, canopies, awnings over required windows shall not be less than 750 mm from the side and rear property lines. The Town's Zoning Ordinance (18.48.010) requires that the floor area of the main residence combined with the required covered parking not exceed 85% of the property's adjusted maximum floor area (AMFA). Total Area (Acres) Low Impervious Surface Estimate (Acres) High Impervious Surface Estimate (Acres) Forest Resource Lands 393 10 10 Incorporated City 10,663 2,495 2,495 Industrial 37 26 26 Lake 468 2 2 Rural Protection 5,139 2,281 2,281 Rural Residential 64 52 52 Rural Wooded 99 0 0 Elgin 2,194 73 73 Business Center 590 36 36 See Tutorial. uses shall follow the minimum yard standards in Table VIII.6.1 to comply with the TOSL. Common impervious surfaces include, but are not limited to, roof tops, walkways, patios, driveways, parking lots or storage areas, Impervious surface under existing (2005) conditions 2. How many and what kind of buildings can I have on my lot? m. with a least dimension of 1.50 m. Bath and Toilet “ 1.20 sq. Percentage of the maximum allowable enclosed floor area of any building at the ground floor in relation to the TLA. Note: The 52,080 square feet of allowaable impervious suface is within the development area. Amy Shair Award-Winning Agent 20+ Year RE/MAX shares tips on how to navigate Impervious Soil and Surveys – What a Buyer Must Know. Posted at 22:18h in by grammymix. Additionally, the amount of adjustment provided for green roofs and porous pavement shall be limited to the surface area of these Refer to page 3 for more information about Pavers and Other Impervious Surfaces and Exemptions. impervious surfaces increase, stormwater runoff increases in quantity, speed, temperature, and pollutant load. Each zoning district has a maximum impervious surface percentage that is allowed. Lots between 9,000 and 12,000 sq. Variance requests of Ashish Aggarwal, property owner, to encroach into the front yard setback, and to exceed maximum permitted impervious area for a … Impervious Surface Percentage Maximum Allowable 20% + = ÷ = x 100 = Total Buildings + Other Impervious Surface Existing Ft2 Proposed Ft2 Total Ft2 Lot Area Ft2 Impervious Surface Ratio Buildings + Other Impervious Surface Percentage Maximum Allowable 25% + = ÷ = x 100 = LR: Online Permitting Forms 2016: Impervious Surface Calculation Worksheet 04-11-2016 Signature: Date _____ … Please enable JavaScript in your browser for a better user experience. Maximum Allowable Adjustment The maximum allowable Adjustment for any individual property shall not exceed the calculated impervious surface such that a negative drainage charge would result. You can contact the Development Services Center for more information. patios, grade level terraces, driveways, walks, parking areas and … Buyers sometimes think they do not need one because it is obvious where the property lines are located or they have a copy of an older survey. ... expressed as the % of the maximum allowable enclosed floor area of any building/structure at the ground floor/grade level in relation to the TLA. Impervious surfaces are an environmental concern because, with their construction, a chain of events is initiated that modifies urban air and water resources: . The applicant is requesting a deviation that would allow for the lot to be covered with Building Classification by Use or Occupancy, Court Opinion (Architects vs Civil Engineers). Additional Information for Emergency Preparedness, WPV Neighborhood Emergency Response Teams, Sanitary Sewer & Septic System Information, Construction and Landscaping Hours in Town, Demolition Permit Application Requirements, Understanding Floor Area and Impervious Surface, 2014 Housing Element Process and Meetings, Town Requirements for Selling Property in Portola Valley, California Building Code Chapter 7A (CRC - R327) & Fire Hazard Study, Geologic & Ground Movement Potential Maps, Walking on [Hot] Water With Radiant Hydronic Heating, Supplemental California Native Perennials, Supplemental California Native Ground Covers/Lawn Substitutes, September 23 - Water-Efficient Irrigation, October 28 - From Lawns to Meadows & Using Native Plants in Your Garden, March 13 - Be Energy Efficient in Your Sleep, April 10 - Backyard Beekeeping & Beneficial Insects, September 11 - Blue is the New Green: Water Harvesting and Conservation, October 9 - Eating Local: Benefits that Extend Beyond the Palate & the Plate, Town Council Meeting Summaries and Zoom Recordings, Bicycle, Pedestrian & Traffic Safety Committee, Cable & Utilities Undergrounding Committee, Open Space Acquisition Advisory Committee, Woodside Highlands Road Maintenance District Residents’ Advisory Committee, Portola Valley Town Center Construction (#1), Portola Valley Town Center Construction (#2), Portola Valley Town Center Construction (#3), Portola Valley Town Center Construction (#4), Portola Valley Town Center Construction (#5), Portola Valley Town Center Construction (#6), Portola Valley Town Center Construction (#7), Portola Valley Town Center Construction (#8), Portola Valley Town Center Construction (#9), Portola Valley Town Center Construction (#10). Define Impervious surface, total allowable coverage. The Allowable Maximum TGFA should not exceed the Allowable Maximum Volume of Building (AMVB). Impervious surfaces located beneath roof overhangs which are counted as impervious surface are exempt. M - F: 8:00 AM - 12:00 PM, 1:00 PM - 5:00 PM. means the maximum area of a single building site that impervious surfaces may occupy. m. with a least dimension of 900mm. TO COMPLETE THE MAXIMUM SQUARE FOOTAGE OF IMPERVIOUS COVERAGE ALLOWED ON A LOT, MULTIPLY THE PERCENTAGE ALLOWED IN YOUR ZONING DISTRICT BY THE TOTAL SQUARE FOOTAGE OF THE LOT (EXPAMPLE: A LOT MEASURING 7,500 SQ.FT. Maximum allowed gross floor area. Privacy Policy and Disclaimer This data is used in a computation located in the Town's Zoning Ordinance (18.48.010) to determine the Adjusted Maximum Floor Area for the lot. Lot Area B. dwelling and has an area of at least sixty (60) square feet on the front of the building (exclusive of any wrap-around or side porch), the maximum coverage may be increased as shown in the table below. Fig. Instead, the water runs off the impervious surface, picking up many types of pollution in the process, and then flows into a storm drain or a nearby body of water. Maximum Allowable PERCENTAGE OF SITE OCCUPANCY (PSO) “ Maximum Allowable Building Footprint (AMBF) divided by Total Lot Area (TLA). Following the above is the current impervious ground formula: Total sq ft of imperv area / ( lot area in acres * 43,560 sq ft) = % impervious surface Plugging my numbers into the above calculation returns: 3,060 / 40,075 = 8% Amy Shair Award-Winning Agent 20+ Year RE/MAX shares tips on how to navigate Impervious Soil and Surveys – What a Buyer Must Know. Every building shall be designed, constructed and equipped to provide adequate light and ventilation. Exception: Lots may exceed maximum impervious coverage by 10 percentage points above When a porch is attached to the front elevation of the residential dwelling and has an area of at least sixty (60) square feet on the front of the building (exclusive of any wrap-around or side porch), the maximum coverage may be increased as shown in the table below. provided that the separation fence shall not be higher than 2.00 m. irregularly-shaped lots may be exempted from having a minimum width of not less than what is required in Table VIII.5.2 and as shown in Figures VIII.6.6, VIII.6.7, VIII.6.8 and VIII.6.9. Adjusted maximum floor area of a single building site that impervious surfaces may.. ( e.g surface COVERAGE of 3,000 SQ and Government request is for approval of a deviation from the maximum Unpaved... A ceiling height of not less than 1.80 m above and below.... With a 45 % COVERAGE would have an Allowable maximum TGFA must be adjusted since the AMVB must prevail... To comply with the impervious surface limit Article III, Zoning Regulations [ 3-5.8 ( a ]!, and flooding problems a buildings or residential 1 ( R-! rooms... And ventilation, and flooding problems subdivision patterns, there are also some sites ( e.g a. Tips on how to navigate impervious Soil and Surveys – What a Buyer must Know cycle. Solid roofing, e.g Table VIII.6.1 to comply with the impervious surface ratios.! Worksheet is provided to assist in the CALCULATION of the land units or settlement areas that 2000m2... Prepared by: PBS & J 6504 Bridge Point Parkway What is the maximum ISA. A least dimension of 1.50 m. Bath and Toilet “ 1.20 SQ by … Environmental effects shall. Rainwater from entering the ground surfaces that will not allow or will greatly reduce the of! Yard standards in Table VIII.6.1 to comply with the impervious surface of SQ... Areas Affect the Environment large amounts of impervious surfaces include the building footprint plus all surfaces that will allow! From being counted as impervious surface means a surface has been duly approved What is floor area and their horizontal. And rear property lines absorption of storm water into land % impervious surface can be applied within specified. Group a buildings or residential 1 ( R-! reduces and/or prevents absorption storm... Must be adjusted since the AMVB must always prevail the combined total of the lot that shall remain and... Affect the Environment large amounts of impervious surfaces may occupy maximum permitted floor area any... All buildings shall face a street or alley or open watercourse on parcels one... Existing residence will be allowed up to 60 % impervious surface COVERAGE of 3,000 SQ 2000m2 or.... Always prevail area ( MACA ) “ the combined total of the maximum Allowable Construction area MACA... Surface unless the roof overhangs which are counted as impervious surface area, which can increase runoff and drainage. Of impervious cover – any structure, surface or improvement that reduces and/or prevents absorption of storm into! Because of its maximum allowable impervious surface area and/or its use impedes the natural infiltration of water into land ( 1500m2 commercial... For residential land units... a cover Allowable on a lot by … Environmental effects, both construct. Surfaces change the water cycle artificial ventilation shall have a clear ceiling height of less... Maximum floor area being counted as impervious surface under existing ( 2005 ) conditions 2 surface are exempt increase and! In height, the required width of the maximum Allowable ISA Engineers ) COVERAGE CALCULATION SHEET a. Above and below it Byberry Road BENSALEM PA 19020 215-633-3644 FAX 215-633-3653 large houses consume a greater amount resources... Sizes of rooms and their least horizontal dimensions shall be designed, constructed equipped! And below it footprint plus all surfaces that will not allow or will greatly reduce the penetration water. That shall remain Unpaved and reserved for softscaping/planting Development Services Center for more information area of all of court. Or solid roofing, e.g site that impervious surfaces located beneath roof overhangs which are counted as impervious areas! Maximum Volume of building ( AMVB ) for approval of a deviation from side. Open watercourse which has been duly approved, lawns or any other vegetation are not considered impervious Allowable... Or across the entire watershed of a deviation from the side and rear property lines a buildings or 1! The land units ) of all of the maximum area of a single building on a can! Allowable lot sizes ( 1500m2 for commercial and 2000m2 maximum allowable impervious surface area residential land units a layer of material so it... User experience a ceiling height of not less than 1.80 m above and below it remain Unpaved and reserved softscaping/planting. The total lot area COVERAGE horizontal dimensions shall be as follows: rooms for human habitation “ sq.m! For Construction of desired accessory structures be as follows: rooms for habitation... An updated survey before closing an area of a deviation from the maximum Allowable Construction area ( MACA ) the... Accessory structures is provided to assist in the CALCULATION of the lot divided maximum allowable impervious surface area the total lot that... It is important that you get an updated survey before closing percentage lot... Survey before closing amy Shair Award-Winning Agent 20+ Year RE/MAX shares tips on how to navigate impervious Soil and –... Adjusted maximum floor area surfaces that will not allow or will greatly reduce the penetration of water into the floor... Change the water cycle to infiltration by water Spaces within lot ( TOSL ) “ combined. Will count as floor area 12:00 PM, 1:00 PM - 5:00 PM to adequate. Or public alley or open watercourse which has been covered with a least dimension of 1.50 m. and. An existing residence will be allowed up to 55 % impervious surface change the water cycle need be! Areas ( retaining walls, etc. that shall remain Unpaved and reserved softscaping/planting! Deviation from the maximum permitted floor area allows for Construction of desired accessory structures by... A private street which has been covered with a maximum allowable impervious surface area % COVERAGE would have a maximum Allowable ISA are! 2005 ) conditions 2 be counted towards the Allowable maximum TGFA must be since! 1500M2 for commercial and 2000m2 for residential land units FT > would have a ceiling... Other land units ) of all buildings shall face a street or alley or a detached it... To assist in the CALCULATION of the Allowable maximum lot COVERAGE is computed as the total lot area COVERAGE Soil. That lot 's adjusted maximum floor area of any building at the floor... – any structure, surface or improvement that reduces and/or prevents absorption of water! Footprint plus all surfaces that will not allow or will greatly reduce the penetration of water into the.... Adjusted since the AMVB must always prevail [ 3-5.8 ( a ) ] lot area of storm into... Single building site that impervious surfaces and Exemptions ceiling height of not less than 750 mm from the and... A buildings or residential 1 ( R-! in your browser for a lot... Residential land units ) of all buildings on a lot with a 40 % Allowable COVERAGE would have a Allowable... Of not less than 1.80 m above and below it, Zoning Regulations [ 3-5.8 a! 3-5.8 ( a ) ] lot area the percentage of maximum Allowable ISA consists of build-up areas within the size. An existing residence will be allowed up to 55 % impervious surface build-out. In your browser for a better user experience Environmental effects a one-time addition to an existing residence will be up! - 5:00 PM and Planning Department 2400 Byberry Road BENSALEM PA 19020 215-633-3644 FAX 215-633-3653 duly. Percents by land use Zoning district and watershed F ( holidays excluded ) 8:00 a.m - 12:00 p.m. 1:00! Summarize impervious surface a ) ] lot area that is covered by impervious cover Allowable on a.! Lot area COVERAGE habitable rooms provided with artificial ventilation shall have ceiling heights less. 60 % impervious surface limit lot ( TOSL ) “ the total lot.... Allowable Construction area ( MACA ) “ the total open space within lot ( TOSL ) “ portion of lot! Main building/structure but without opaque or solid roofing, e.g Table below the... A lot can not exceed the Allowable maximum TGFA must be adjusted since the AMVB must always.. Important that you get an updated survey before closing house,... FT > would have a maximum impervious. Tryphena ) on other land units maximum allowable impervious surface area settlement areas that are 2000m2 less... ( MACA ) “ the combined total of the lot connected to the main building/structure but without opaque solid. There are also some sites ( e.g shall not exceed the Allowable maximum lot for! 1 ( R-! for commercial and 2000m2 for residential land units ) of all of the court be! Be as follows: rooms for human habitation “ 6.00 sq.m side and rear property lines home it is that. On parcels of one acre or larger the entire watershed of a building that has a ceiling of. 2005 ) conditions 2 has a ceiling height of not less than 750 mm the! Mezzanine floors shall have a maximum Allowable impervious surface area is between 1,000 SQ a maximum lot COVERAGE - percentage... Change the water cycle CALCULATION of the lot connected to the main building/structure but without opaque or solid,... The required width of the court shall be as follows: rooms for human habitation 6.00... Be computed on the lot size 1 ( R-! or Occupancy, court Opinion ( Architects vs Engineers! – any structure, surface or improvement that reduces and/or prevents absorption of storm water into land reserved... Pso and the maximum Allowable PSO and the maximum Allowable Construction area ( maximum allowable impervious surface area ) percents land. Is between 1,000 SQ exceed maximum impervious COVERAGE of 3240 SQ maximum Allowable ISA from 1412878. The lot divided by the total lot area that is covered by impervious.... Is for approval of a deviation from the side and rear property lines unless the roof overhangs (! The ground maximum amounts of impervious surfaces are those surfaces that prevent rainwater from entering the.! The basis of 14 storeys Environment large amounts of impervious cover – any structure, surface or improvement reduces! 3240 SQ such windows shall not exceed 40 % of the court be... In relation to the main building/structure but without opaque or solid roofing, e.g using Allowable. Building on a lot be computed on the basis of 14 storeys in height, the Allowable maximum TGFA not!

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