Select a base geography (depending on the dataset, different geographies may be available). Hard surfaceon a property that does not allow rain to soak into the ground. PDF Impervious Surface Ratio Worksheet Critical area is defined as land within one-half mile upstream and draining to a river intake or within one-half mile and draining to the normal pool elevation of water supply reservoirs. Can My Deck Be Converted to a Screened Porch? Buildings greater than 20,000 square feet are allowed in the CI District if approved through the issuance of a minor special use permit pursuant to Sec. d.The person responsible for on-site spill control and containment, and the appropriate means of contacting that person on a 24-hour basis. if you are ready to start the process of an in-ground pool addition to your home, please contact us at 919-779-1033 or contact us . For districts with minimum street yard requirements (excluding Design Districts): a. A list of nuclear and hazardous materials kept on-site in any quantities; c.The location of spill control valves on any bridges and causeways; and. The more impervious surface, the more we have to manage stormwater. Due to the unexpected cost of those repairs, our clients needed to reduce the budget for their Durham three-season room and deck project. 3.9, Special Use Permit. An impervious surface limit is the amount of surface area on your property that can be covered by a material that significantly reduces the natural drainage of water into the soil. Within the Rural Tier, new public or private sanitary sewer lines or outfalls, including necessary force mains and pump stations, may be permitted within the Watershed Protection Overlays subject to City Council or Board of Commissioners approval, as appropriate: (1)To serve an existing use or structure for which a health hazard has been documented by the County Health Department or the State of North Carolina; or. a. A spray irrigation wastewater treatment system to serve a single-family house shall be permitted, provided that: (1)The owner enters into a written agreement with the Durham County Health Department which: (a)Provides for Health Department access to the property for the purpose of monitoring the system during its construction and operation; and. This is the choice one Durham family made when they encountered two unexpected challenges while planning their new outdoor living space. In addition, the Emergency Contingency Plan shall include: a. 2. It was a nightmare and very stressful, he said. Select a base geography (depending on the dataset, different geographies may be available). With such a broad range, it is vital for a homeowner to get the precise limit for their specific address from the local municipality. Pretty much wherever you are you can run into some kind of impervious limit.. 3. See other maps nearby. WRAL investigates put up an article (and video) on this today. Refer to Streamlines Vol. Other impervious surface limits of the Critical Area Act remain unchanged by the 1996 legislation. Also during the design phase, we discovered our clients design goals were restricted by their propertys impervious surface limits. In the IL District, a primary structure shall be oriented such that at least one of the following standards is met: c.Additional height, up to 145 feet, is allowed if approved through the issuance of a minor special use permit pursuant to Sec. While this may mean some alterations in your projects scope, it could be as simple as adding a special infiltration device, rain garden, or cistern to comply. Riparian buffers are required in accordance with Sec. Multiply the resulting fraction by 100 to get the percent built-upon area. 3.7, Site Plan Review, as applicable. Since water cannot seep into the ground in areas with large amounts of impervious surface, more than 5 times as much water can quickly run off the land into nearby water bodies. To view this site, Code Publishing Company recommends using one of the following browsers: Google Chrome, Mozilla Firefox, or Apple Safari. d.In the County jurisdiction, wastewater treatment facilities may be permitted in the F/J-A Overlay through the issuance of a Major Special Use Permit pursuant to Sec. Minimum side yards in the CN and CG districts can be reduced to 15 feet if adjacent to a nonresidential district or use. Standards for the CN, OI, and CG Districts. At Prestige Pools, it is our business to know the aspects of building an in-ground pool. Impervious Surfaces. (2)The street-facing building faade occupies at least 60% of the total street frontage for the development. Where 50% or more of the lots on the same block face as the lot in question are developed with less than the required street yard, the average setback of the buildings on the developed lots on the block with less than the required street yard shall be observed as the minimum setback for a new structure; b. Notwithstanding this requirement, the Stormwater Division of the City may allow for delay in approval of construction of stormwater controls and submission and approval of as-built drawings for single family housing, duplexes, and townhouses) and other developments requiring multiple certificates of occupancy in accordance with adopted policies of the City. b. 6.10; Sec. This process helps keep the amount of water in streams and creeks from changing too much or too quickly. The City Public Works Director or County Engineer, or their designees, as appropriate, may require the pump station to be equipped with on-site, stand-by power. Table 1: Allowances under 1996 legislation Lot/Parcel Size in square feet Impervious Surface Limit 0-8,000 25% of Parcel + 500 square feet 21,781 - 36,300 5,445 square feet Durham, NC - Municode Library The portion of the donor site restricted from development shall be protected from all future development through use of a permanent conservation easement in favor of either: (1)Durham County or the City of Durham; or. Stormwater Fee Frequently-Asked-Questions Durham, NC Unified Development Ordinance Durham City-County Planning Department Durham County. Why would we have a problem today when we didn't have one when we bought the house? Pannese said. (2)Minimum side and rear yards shall only apply when adjacent to property not zoned SRP or SRP-C. (3)No parking, loading or storage shall be permitted within the required yard areas. 6.10, Nonresidential District and Group Living Development Intensity, 6.10.1, Nonresidential and Group Living Development Standards. 4. For each piece of land, divide the amount (area) of impervious surface (e.g., structures, roads, parking lots) located on site by the total land area under consideration. 4.11.4, Nonresidential Land Use Restrictions; Nonresidential Land Use Restrictions, intensities greater than 25% shall require a Major Special Use Permit pursuant to Sec. WSW FAQ | NC DEQ - NC Dept. of Environmental Quality What is Your Impervious Surface Limit and How Does it Affect Your Since impervious surface doesn't allow rain to soak in the ground, we need to manage where that water goes and how it flows. 3. Additional height up to 75 feet is allowed if approved through the issuance of a minor special use permit pursuant to Sec. Details. The results are many, including an increased burden on stormwater infrastructure, erosion, reduced water quality, 'heat island effects', and both ground-level and water pollution. Job Opportunities at DEQ. This applies to properties with more than 400 square feet of impervious surface. It varies by county, town and even neighborhood, so there's no simple chart to see if you're in compliance. As with all Archadeck of Raleigh-Durham projects, we worked with the family to address their issues and achieve their goals. 3.9, Special Use Permit. The impervious surface credit transfer shall not be from a donor parcel in Area B to a receiving parcel in Area A, or from a donor parcel in an F/J-A area with a nine percent limit to a receiving parcel in an F/J-A area with a six percent limit. To learn more, view our full privacy policy. Current: Attached: No specific provision . Development plans, site plans, preliminary plats, and final plats shall clearly identify the amount of existing and proposed impervious surfaces. Within one-half mile of the normal pool: six percent; Between one-half and one mile from the normal pool: nine percent. What a typical flood on Peachtree Creek looks like is shown below in a "before and after" picture from the homeowner's now 10-foot high entryway. 919-996-3778, Stormwater Planning and Development FAQs Durham, NC CivicEngage (opens in new window)(opens in new window)(opens in new window), Site maintained by Research Action Design (opens in new window), Multi-Resolution Land Characteristics Consortium, Multi-Resolution Land Characteristics Consortium (MRLC). Impervious surface credit transfer is subject to the following provisions: a. Property owners and land developers are recommended to leave the buffer areas in public ownership and/or to dedicate them as a linear greenway or park. Impervious Surface The applicant shall hold a neighborhood meeting pursuant to paragraph 3.2.3, Neighborhood Meeting, unless it previously held one for the development at issue. b. An official website of the State of North Carolina, North Carolina Department of Environmental Quality, Environmental Assistance and Customer Service, Environmental Education and Public Affairs, Distance Learning - Environmental Education, Water Supply Watershed Interactive Map Viewer. Credit for the impervious surfaces allowed on one or more parcels (donor parcels) can be transferred to non-contiguous parcels (receiving parcels), such that the amount of impervious surface available for a development project would be the total of what is normally allowed on the receiving parcel plus what is transferred from the donor parcel(s). The homeowners discovered they did not have the impervious surface space they needed to create an outdoor living space in the original size they wanted. PDF A-4. Built-Upon Area The property owner has posted a performance bond, other surety instrument, or other payment satisfactory to the City or County, as appropriate, in an amount determined by the City Public Works Director or County Engineer, or their designees, as appropriate to assure construction, maintenance, repair, and/or reconstruction necessary for adequate performance of the engineered stormwater controls. 6.10.1 - Durham Unified Development Ordinance Impervious area is hard surface on a property that does not allow rain to soak into ground. 3.9, Special Use Permit. Composite Deck BuilderDeck GalleryComposite Deck Gallery. I disagree with my billing tier or ERU calculation. (2)If associated with a wastewater treatment facility permitted pursuant to paragraph 1, Wastewater Treatment, above. Property owners are encouraged, but not required, to maintain at least the first 25 feet of the buffer next to the stream in a naturally vegetated or undisturbed state. The dimensional standards, and supplemental requirements to the dimensional standards, are as follows. Additional height in the CI District, up to 50 feet, is allowed if the building uses upper story step-backs at a ratio of one-to-one. Side yards in the OI and CG districts can be reduced by up to 50% if adjacent to a nonresidential district or use, or a railroad right-of-way. Pittsboro NC Real Estate Agent Eric Andrews discusses the Zillow Zestimate. 3.9, Special Use Permit. The high-density development option allows for more built-upon area on a site through the use of stormwater management techniques to mitigate the effects of the increased impervious surface and the resulting increased rainfall runoff. When preparing for a new outdoor living expansion, you will need to find out if you are currently complying with your impervious surface limits and, if so, how much room remains on which you can build. Tim Maloney is Wake County's planning, development, and inspections director and oversees the unincorporated areas. We had to make accommodations to the buyer and spend all this money.. What is a stormwater utility? Public and private pump stations shall be equipped with the following safety features: (1)Battery-backed alarm systems activated by pump failure or power outage, connected by an automatic dialer to a 24-hour maintenance service approved by the City Public Works Director or County Engineer, or their designees, as appropriate. 3.9, Special Use Permit. To learn more about the impacts of concentrated impervious areas see the EPA fact sheet linked below. 3.9, Special Use Permit. 3.9, Special Use Permit. . Their low-maintenance deck features TimberTech Terrain deck in Brown Oak and Sandy Birch and AZEK Impressions Rail in black. 1Building coverage may be further restricted by the impervious surface requirements of paragraph 8.7.2B, Impervious Surface Limits. Phase two would include the addition of a porch roof and windows. 3.9, Special Use Permit, subject to the restrictions described in Sec. 1, no. 1 Building coverage may be further restricted by the impervious surface requirements of paragraph 8.7.2B, Impervious Surface Limits. 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. 1, no. Studies have shown that as development and the amount of impervious surfaces increases in a watershed, severe flood events happen more often. The system safely carries water through streets and yards to storm drains and streams. 8.7, Watershed Protection Overlay Standards. The MRLC is a long-standing consortium of federal agencies which provides geospatial data describing land cover characteristics across the United States. FAQs | Durham County - DCONC These limits will be anywhere from 20%-65%. 3. Why Is Percent Impervious Area Important? The reason is due to rain, which falls on natural surfaces and slowly filters its way into the earth and nearby water supplies. Impervious surfaces, including paved areas such as roads, parking lots, and sidewalks as well as rooftops, prevent water from draining naturally into the ground. Development in the Rural Villages of Bahama and Rougemont, as designated in the Comprehensive Plan, can use the Suburban Tier dimensional standards subject to Sec. The biggest advantage a franchise, NC Real Estate Broker Eric Andrews explains that sellers should keep in mind with big due diligence checks come big expectations. (2)Side and rear yards can be eliminated if adjacent to a railroad right of way, or can be reduced to 30 feet if adjacent to permanently protected open space and the building separation is at least 150 feet. Updated: Feb 17, 2023 Impervious surface is. Connection to the Stormwater Fee The fee is based on the amount of impervious surface area on a property. - STORMWATER UTILITY . In some parts of Wake County, such as the Swift Creek Watershed, homeowners . 8.5, Riparian Buffer Protection Standards. c.Additional height in the OI and CG Districts, up o 145 feet, is allowed if approved through the issuance of a minor special use permit pursuant to Sec. c.For office, institutional, commercial, industrial, and multifamily projects, building permits may be issued; but construction drawing approval, or water or sewer permit approval, shall be withheld until compliance with paragraphs a and b above. Hurricane Florence hit the east coast, causing significant damage to another one of their properties. Impervious limits refer to the percentage of land that can be covered with impermeable surfaces (e.g., driveways, sidewalks, decks, and patios). We switched to NLCD data in order to both extend the time series reported here - showing information for both earlier and more recent years - and to extend the area of coverage to the entire county. Impervious Surface Ordinances in Raleigh NC - Eric Andrews Realtor The only classification which prohibits new development (WS-I) contains no privately-owned land. Pat Pannese said he was blindsided when the mortgage surveyor informed him his .21-acre property in the Bedford Falls neighborhood exceeded the city's impervious surface ordinance. 40%, for all areas not in the Rural Tier and for those uses allowed in Sec. maintenance by the City of Winston-Salem or the North Carolina Department of Transportation. Since. Is the Zillow Zestimate Accurate in Rural Areas? A protected area is defined as land within five miles and draining to the normal pool elevation of water supplies/reservoirs or within ten miles upstream and draining to a river intake. What is an impervious surface? 3.9, Special Use Permit. d.A development within the CN district, with new project floor area over 5,000 square feet, no development plan, and residential zoning districts adjacent (including directly across a public right-of-way) to two or more property lines requires a Minor Special Use Permit pursuant to Sec. This requirement shall also apply within the City jurisdiction unless the system has been approved by the State. However, our design team reworked their design in order to create as much outdoor living space as possible within their new budget and impervious surface limitations. 3. Unfortunately, while we were working on an initial plan for their new project, disaster struck. Counties, cities, towns, and even neighborhoods can have completely different ordinances than the next neighborhood a quarter mile away. a. c.Additional height in the OI District, up to 145 feet, is allowed if approved through the issuance of a minor special use permit pursuant to Sec. 5 for more information regarding impervious surfaces. c.Height shall be capped at 45 feet for any structures located within 150 feet of the perimeter of the Compact Neighborhood Tier where the Tier adjoins residentially used and designated property. Date Updated 4. NOTE: Prior to June 2020, the Compass relied on National Agricultural Imagery Program (NAIP) data sourced from the EPA EnviroAtlas. The more impervious surface, the more we have to manage stormwater. City and County of Durham, NC | Open Data Portal. If an applicant plans to install a surface that does not meet one of the five exemptions to built-upon area called out in N.C.G.S.143-214.7(b2), he has the option of demonstrating to the permitting authority that the proposed surface allows an adequate level of stormwater infiltration to be considered either pervious or partially pervious. 5 for more information regarding impervious surfaces. (2)Parking decks shall provide openings for each level of the faade facing a right-of-way at a minimum rate of 30% of the faade. 2. https://raleighnc.gov/stormwater/services/stormwater-utility-fee/impervious-surface If the entity accepting the easement is not the County or City, then a third right of enforcement favoring the County or City, as appropriate, shall be included in the easement. All nonresidential and group living development in the Suburban Tier as designated in the Comprehensive Plan shall comply with the standards in the tables below. For more information on how buffers can help water quality, refer to Streamlines Vol.1, no. When adding on to your home, a survey or plot plan is required to be submitted to the building department as part of the permitting process to ensure you are staying within your impervious surface limits. Durham, NC Open Data Portal - ArcGIS The 10/70 provision is considered a "high density" option and therefore requires a 100-foot buffer along all perennial streams when being utilized. This division does not . b.Rear yards can be reduced by up to 50% if adjacent to a railroad right-of-way. Disclaimer: The Durham City-County Planning Department office has the official version of the Durham Unified Development Ordinance. a. Users should contact the Planning Department for amendments subsequent to the amendment cited here. 3.9, Special Use Permit. c.The portion of the donor parcel which is restricted from development as part of the impervious surface credit transfer shall remain in a vegetated or natural state or used for crop production or pasture provided that best management practices (BMPs) as developed by the Soil and Water Conservation District are utilized. 2 Stormwater control measures (SCMs) are required for projects exceeding 12% impervious, or 5,227 sq.ft. However, this provision shall not apply if the street right-of-way is less than 50 feet wide and property on the opposite side of the street is residentially used or zoned, in which case the provisions of paragraph 6.8.2A, Street Yards, shall be applied. There are two types of buffer requirements: an agricultural buffer and a development buffer. However, water from roofs, sidewalks, driveways and patios collects and flows unfiltered posing more of a contamination threat to drinking supplies. Terms and definitions used throughout the EnviroAtlas website, fact sheets, and other resources. c.In considering such extensions, all reasonable alternatives shall be considered prior to a decision to extend the sewer services. b. 1. Comparisons to all areas of the contiguous US are also made possible by choosing NLCD for these summaries. In the Urban and Compact Neighborhood Tiers, excluding Design Districts, the applicable street yard of a multiple-frontage lot shall be applied to the frontage with the predominant orientation of existing structures along the blockface. Multiply the resulting fraction by 100 to get the percent built-upon area. Users should contact the Planning Department for amendments subsequent to the amendment cited here. if the zoning district in which the property is in has impervious surface limits, then those . All service connections, installed in accordance with the North Carolina Plumbing Code, shall be permitted only in accordance with Article III, Water and Sewer Main Extensions, of Chapter 70, Utilities, of the Durham City Code. (3)Standards of Sec. Counties, cities, towns, and even neighborhoods can have completely different ordinances than the next neighborhood a quarter mile away. Do you prefer monthly or annual billing? North Carolina Department of Environmental Quality. For other classifications, using density bonuses, density averaging or other flexibility measures built into the rules gives communities and developers ample possibilities for growth. Impervious Surfaces and Flooding | U.S. Geological Survey I think there's room for improvement in any way that we communicate with the public, he said. Pannese said he never changed anything after moving into the house in 2006. Research has shown that as the amount of impervious surface in an area increases, the amount of polluted runoff also increases. Any development in a Watershed Protection Overlay shall be subject to limits on the amount of impervious surfaces permitted in accordance with the following table. An impervious surface is a hard area that doesnt allow water to seep into the ground. Nonresidential and Group Living Development Standards. d.Where the right-of-way line is further from the curb than the maximum street yard, the right-of-way line shall be the required maximum street yard; structures shall not be allowed in the public right-of-way. 2. Except as allowed in paragraph c below, no building permit shall be issued for a site proposed for development, until: a. Except in the Rural Tier, public and private sanitary sewer lines, force mains, and pump stations shall be permitted within all Watershed Protection Overlays. Since these types of surfaces reduce the natural drainage of water into the soil, limits are mandated by the local government to safeguard the drinking water supply. 2. c.Height in the OI District shall be capped at 45 feet for any structures located within 150 feet of the perimeter of the Compact Neighborhood Tier where the Tier adjoins residentially used and designated property. No certificate of compliance shall be issued for any structure constructed within a site proposed for development, other than as allowed below, until the City Public Works Director or County Engineer, or their designees, as appropriate, has approved construction of the engineered stormwater controls and after review and approval of submitted as-built drawings. What services do I get from paying stormwater utility fees? Impervious surface limits vary widely from county to county, city to city, town to town, and even from neighborhood to neighborhood. Real estate agent Melissa Schambs says homeowners are constantly caught off guard by the limitations, partly because rules vary depending on where they live. The dike or structure shall be sized to handle at least the maximum amount of material to be stored or used and shall be constructed and installed in a manner to exclude rainwater and stormwater runoff.