Concrete Flatwork & Walkways
We pour concrete flatwork for homes and businesses across Sonoma County. Walkways, sidewalks, entry landings, curbs, slabs and pads.
Rich's Paving builds concrete ADA ramps for businesses and other commercial properties in Petaluma and across Sonoma County. We pour ADA curb ramps at the parking lot and short ramps with level landings at the entrance. We also pour the accessible route walks that join them. If an old walk or ramp is too steep or tilts sideways, we tear it out and repour it. We are a third generation family paving company, and we have paved Sonoma County since 1988.
Every ADA ramp job starts with a visit to the site. We measure the existing slopes and the rise, and we check which California Building Code rules apply before we quote. Then you get a written estimate. The asphalt patch and restripe beside a new curb ramp happen on the same visit. Walks, sidewalks and pads away from the entrance fall under our concrete flatwork services.
Tell us about your project and we will get right back to you.
In California, an ADA ramp at a business follows Chapter 11B of the state's building code. The 2025 California Building Code has been in force since January 1, 2026. A ramp run can be no steeper than 1:12. That is one inch of rise for every 12 inches of run, or 8.33 percent. Cross slope stays at 1:48 or flatter. Clear width is 48 inches minimum, wider than the federal 36 inch rule. One run can climb 30 inches at most.
Every ramp run needs a level landing at the top and at the bottom. A landing is at least 60 inches long, and a top landing is at least 60 inches wide. The bottom landing extends at least 72 inches in the direction of the run. Ramp runs carry handrails. Curb ramps need none, and neither does a run at a door landing that rises less than 6 inches or runs less than 72 inches. Landings that get wet have to be built so water does not pond. Our walk-through of the California ADA ramp requirements has the details.
Chapter 11B calls for an accessible route to the entrance from the accessible parking and the public sidewalk. Along the route, a walk steeper than 1:20, or 5 percent, counts as a ramp. Where the walk meets the lot, a curb ramp spans the change in level at the curb. Its run is no steeper than 1:12, and any flares stay at 1:10 or flatter. The accessible stalls and access aisles themselves are striping work.
A curb ramp needs at least 48 inches of clear width and a 48 inch landing at the top. Within 24 inches of the ramp, the gutter and road counter slope can be no steeper than 1:20. Detectable warnings go on every curb ramp. The surface is yellow, and at a perpendicular curb ramp it runs 36 inches deep in the direction of travel. A curb ramp and its flares cannot reach into a parking stall, an access aisle or a drive lane. The US Access Board says the same of built-up curb ramps.
We start by measuring the existing slopes and the rise to cover. Then we break out the old walk or ramp and haul it off in our dump trucks. Base rock goes down next, and a plate compactor packs it tight. We set the forms to the slope. The US Access Board recommends a 7.5 percent running slope and a 1.5 percent cross slope for exterior ramps. Concrete can vary slightly along a run, and that margin absorbs it.
A ready mix truck delivers the concrete into the forms. Then we screed it, float it and give it a broom finish for grip. We tool the edges and control joints while the concrete is soft. On a curb ramp, the yellow detectable warning surface goes into the wet concrete. We form each ramp run and its edges so the handrails can go in. Last, we patch the asphalt along the ramp and restripe the stalls beside it. Bigger lot work falls under commercial parking lot paving.
Usually, yes. Section 105.2 of California's building code exempts a sidewalk or driveway up to 30 inches above grade. The exemption does not reach a walk on an accessible route. Section 105.1 calls for a permit before construction work, so plan on the building department for a ramp, curb ramp or route walk, even at grade. Permit Sonoma requires an encroachment permit for work on a public sidewalk, curb or street in unincorporated Sonoma County. Inside city limits, check with the city instead.
Altering a building can also trigger the path of travel rule in Section 11B-202.4, which can require access upgrades. Under the valuation threshold, that spending is capped at 20 percent of the adjusted construction cost. Resurfacing or restriping a lot by itself stays limited to the actual scope of work. Our California ADA parking guide explains that rule. An accessibility inspection and report comes from a Certified Access Specialist, or CASp. The state's Division of the State Architect certifies these specialists. Our part is the concrete work their reports call for.
Clear written estimates across Petaluma, Santa Rosa & the Bay Area.
(707) 217-0835From the first site visit to the final pass of the roller, here is how it goes.
We come see the site: the old surface, the ground under it, how water moves, and what the job really takes. No blind quotes over the phone.
You get a written estimate with a real number and a real timeline. It covers what is included, from grading and base rock to the finished surface, and it holds unless the scope changes.
Our own crew and equipment show up when we said and build the job the way we quoted it. Base first, then the surface, compacted and finished right.
Before we call a job done, we walk it with you. Clean edges, solid compaction, water running where it should. Done means you say it is done.
Common questions about ada ramps and curb ramps across Petaluma, Santa Rosa & the Bay Area. Don't see yours? Give us a call.
We pour concrete flatwork for homes and businesses across Sonoma County. Walkways, sidewalks, entry landings, curbs, slabs and pads.
We stripe and restripe commercial lots across Sonoma County. Standard stalls, ADA spaces with access aisles, fire lanes, arrows and stencils.
Commercial paving for parking lots at offices, apartment complexes, retail centers, business parks and wineries, including striping and ADA layout.
Rich's Paving is a third generation family paving company. The family name is on the work, and the family runs the crew on every job.
Most companies do one or the other. We install both, so you get a recommendation based on your property, not on the only material a contractor happens to sell.
Paver, rollers, dump trucks and compaction equipment, run by our own crew. The schedule and the quality stay in our hands from grading to the last pass.
Clay soils that swell in the winter rain and shrink all summer. We have paved on this ground since 1988, and we build the base for what it does.
California ADA ramp rules from Chapter 11B: a 1:12 slope, 48 inches of width, 30 inches of rise per run, landings, handrails and curb ramp detectable warnings.
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How many accessible spaces a California lot needs, plus stall sizes, access aisles, symbols, signs and fines under Chapter 11B of the building code.
Read more →A driveway past its best years, a parking lot due for new stripes, or a gravel road that needs real grading? Call or send the form. We will come look at the job and put a clear estimate in your hands, from the family that has paved Sonoma County since 1988.
Tell us about your project and we will get right back to you.