In Oakland, a permeable resin-bound surface can only be considered for stormwater control when it is built as a pervious pavement system: a permeable surface over a gravel or open-graded storage layer that holds the C.3 design volume. The permit and the county manual name pervious concrete, porous asphalt and pavers, not resin-bound, so the City decides whether it qualifies. The Alameda Countywide Clean Water Program's guidance is blunt that pervious pavement without that engineered base is treated as impervious.
That rule matters more now that the Bay Area's Municipal Regional Permit pulls smaller projects into Provision C.3. A permeable section can shrink the treated area, act as a self-treating area, or meet a small project's site design requirement, provided the build-up under it is designed for Oakland's very mixed ground.
Provision C.3 under MRP 3 and what Oakland asks for
Oakland is a permittee under the San Francisco Bay Regional Water Quality Control Board's Municipal Regional Stormwater Permit, Order No. R2-2022-0018, known as MRP 3 and amended in October 2023. Since July 1, 2023, new development and redevelopment projects that create or replace 5,000 square feet or more of impervious surface are Regulated Projects that need LID source control, site design and treatment. Auto service facilities, gas stations, restaurants and uncovered parking lots reach the same status at 5,000 square feet.
Smaller jobs are not exempt from thinking about it. Projects that create or replace 2,500 to 5,000 square feet, and single-family homes from 2,500 to 10,000 square feet, must install at least one site design measure, and building patios, walkways, driveways or uncovered parking with permeable surfaces is one of the listed options. Sidewalks, bike lanes and trails built as pervious pavement systems are excluded from the road project category.
Oakland requires its Stormwater Supplemental Form for MRP 3.0 with Planning and Zoning applications for Regulated Projects. Designers work from the Clean Water Program's C.3 Technical Guidance Manual, now at Version 8.4.
From the hills to the waterfront: ground conditions that drive the design
Oakland packs very different ground into a small area. Hill neighborhoods along the Hayward Fault have steep lots and slide-prone slopes where infiltrating water near foundations is a geotechnical question first. The flatlands are largely alluvium with clay content that drains slowly. Along the waterfront, West Oakland and Jack London Square sit partly on Bay fill with shallow groundwater and a long industrial history.
For the engineer, that usually means one of three build-ups. Where tests show the native soil can take water, an unlined stone reservoir under the permeable surface can infiltrate. On clay, the same reservoir needs an underdrain, and on fill or suspected contamination a liner keeps water out of the ground, but the C.3 manual then counts the surface as impervious, so its runoff has to go to a treatment measure. MRP 3 also asks cities to check that infiltration devices without underdrains will not degrade groundwater, so expect questions on any design that sends water straight down.
Project types where it earns its place in Oakland
- Courtyards and roof-deck paths in Uptown, Downtown and Jack London multifamily buildings, usually lined over a podium.
- Uncovered parking and drive aisles at neighborhood retail along the main commercial corridors, where 5,000 square feet triggers C.3.
- Patios, paths and driveways on Rockridge, Montclair and Grand Lake homes using the site design option for small projects.
- Schoolyards and campus walkways being rebuilt with green infrastructure goals.
Runoff from these areas reaches creeks such as Sausal and Temescal, Lake Merritt or the Bay. Cutting it at the source has a visible local payoff.
Getting a resin-bound section approved in Oakland
Fill out the Stormwater Supplemental Form early and show the permeable area in the C.3 drainage plan with its sizing, base depth, any underdrain or liner, and the maintenance agreement the City will require. Reviewers will look for proof that the section stores the C.3.d volume; without it, the area is counted as impervious and must drain to treatment.
Resin Rock manufactures and supplies the system: UV-stable binder, natural stone aggregate blends, trims and the Rock Crete permeable sub-base. We do not install. Our technical data sheets support the C.3 submittal, and we can match you with an approved installer, usually within 24 hours.
Before you specify permeable resin-bound in Oakland
- Total the created and replaced impervious area to see whether MRP 3 makes it a Regulated Project.
- Submit Oakland's Stormwater Supplemental Form for MRP 3.0 with the planning application.
- Show that the base stores the C.3.d volume, or the surface counts as impervious.
- Get a geotechnical opinion on hillside lots near foundations or slopes.
- Use a liner on Bay fill or any site with suspected contamination.
- Record a maintenance plan for the permeable area.
Common questions about permeable resin-bound in Oakland
Does a permeable resin-bound patio count as pervious in Oakland?
Only if it is built as an engineered system and the City accepts the surface, since the guidance names pervious concrete, porous asphalt and pavers. The Alameda County C.3 guidance treats pervious pavement as impervious unless it has designed voids over pervious soil or a storage layer, such as gravel, that holds at least the C.3.d volume. Resin-bound laid over existing concrete fails that test because the slab underneath still sheds the water.
My hillside remodel adds 3,000 square feet of paving. What do I need?
Under MRP 3, a single-family project creating or replacing 2,500 to 10,000 square feet must include at least one site design measure. Permeable patios, walkways or driveways are one option. On a steep lot, have a geotechnical engineer confirm whether water can safely soak in near foundations, or plan an underdrain.
Can permeable surfacing help a parking lot avoid C.3 treatment?
It can. Pervious paving that stores and infiltrates the C.3.d volume can be left out of the impervious area count, so a lot built that way may fall below the 5,000 square foot trigger. Conventionally paved drive aisles still count, and the City confirms how each area is classified in the C.3 plan.
Official sources for Oakland
- City of Oakland: Municipal Regional Stormwater Permit Resources
- Alameda Countywide Clean Water Program: Development and C.3 Technical Guidance Manual
- SF Bay Water Board: Municipal Regional Stormwater Permit (MRP 3)
Local rules change. We last checked these sources in October 2026. Confirm current requirements with the reviewing agency before you design, and treat this page as a starting point, not engineering or permitting advice.