Concrete Driveway Approaches in Redwood City: What Changes When Your Driveway Meets the Street
If you’re planning a driveway replacement or new installation in Redwood City, there’s one section of the project that most contractors — and most homeowners — don’t think through carefully enough until it becomes a problem: the driveway approach. That’s the concrete panel (or panels) that span from your property line across the public sidewalk zone and down to the curb cut where your driveway meets the street. It looks like part of your driveway. It sits in front of your home. But legally, it’s in the public right-of-way — and that changes everything about how the work gets permitted, built, and inspected.
This is one of the most consistently undercovered topics among local hardscape contractors, and it’s where homeowners most often get caught off guard mid-project. Here’s what you actually need to know.
Why the Driveway Approach Is Different from the Rest of Your Driveway
Your private driveway — the concrete or paver surface on your property — is governed by your normal building permit process and your contractor’s workmanship. But the driveway approach crosses into public right-of-way territory managed by the City of Redwood City’s Public Works department. That means:
- A separate encroachment or right-of-way permit is typically required before any work in this zone begins
- The concrete must be poured to City-specified thickness and mix standards — not just whatever the contractor prefers
- The curb cut (the depressed section of curb that your car rolls over) must meet specific grade and width requirements
- The work is subject to City inspection before it can be accepted
- Any damage to the existing curb, gutter, or sidewalk panel caused during the project may become your responsibility to repair
None of this is unusual or difficult for an experienced contractor to navigate — but it does need to be planned for from the start. A contractor who doesn’t mention the encroachment permit when they’re quoting your driveway job is either assuming someone else will handle it or, worse, planning to skip it entirely.
What Redwood City Actually Requires for Driveway Approach Work
The City of Redwood City maintains standard specifications for concrete work in the public right-of-way. For driveway approaches, this typically includes minimum concrete thickness (often 6 inches in the approach zone, heavier than a standard residential flatwork pour), specific aggregate and strength requirements, and limits on approach width relative to your lot frontage. Wider approaches require additional review and sometimes Planning Department sign-off on top of the Public Works encroachment permit.
If your project involves altering or widening an existing curb cut — say, you’re converting a single-car driveway to a two-car width, or you’re adding a second access point — that triggers a more involved review process. The City will look at sight-line clearance, proximity to intersections, and whether the new configuration complies with current ADA and pedestrian safety standards.
For hillside lots in neighborhoods like Emerald Hills, there’s an added layer: the grade transition between the street and your property can be steep enough that the approach design has to account for vehicle clearance and drainage simultaneously. A poorly graded approach on a sloped Emerald Hills lot doesn’t just look bad — it can cause water to pond at the base of the driveway or sheet directly into the garage.
The Permit Question Most Homeowners Don’t Think to Ask
When you’re getting bids for a driveway project, it’s worth asking each contractor directly: Who pulls the encroachment permit, and is that cost included in your quote? A legitimate answer involves the contractor confirming they’ll handle it and that the permit fee is either included or itemized separately. A vague answer — or a contractor who says permits aren’t necessary for this kind of work — should raise a flag.
Working in the right-of-way without a permit creates real risk for you as the homeowner. If the City discovers unpermitted work during a routine inspection or a neighbor complaint, you may be required to remove and replace the approach at your own expense — even if the concrete looks perfectly fine. That’s an expensive lesson, and it’s one we’ve been called in to clean up after more than once over the years.
For reference on what a properly permitted and inspected concrete project looks like from start to finish, our concrete services page walks through how we approach these jobs.
How This Applies in Nearby Cities Too
The same general framework — encroachment permit, City spec concrete, inspection before final acceptance — applies across most of San Mateo County. San Carlos, Belmont, and Menlo Park each have their own Public Works departments with their own standard specifications, and the permit process varies slightly city to city. In some cities, the application is straightforward and the turnaround is quick. In others, it takes longer, especially if the project involves any modification to the curb cut itself.
If you’re in an unincorporated area of San Mateo County — parts of the Emerald Hills hillside, for example, or properties along the rural stretches of the Highway 280 corridor — the permit authority shifts to the County rather than a city, which has its own set of requirements. Knowing which jurisdiction you’re in before you start is something a good local contractor will confirm for you upfront.
What Good Approach Work Actually Looks Like
Beyond the permit piece, the physical construction of the driveway approach matters. Here’s what separates a well-built approach from one that will crack, settle, or fail inspection:
- Proper base preparation: The subgrade needs to be compacted and, on clay-heavy Peninsula soils, often requires imported base rock. Skipping base prep is the most common reason approach concrete settles within a few years.
- Correct thickness: Approach concrete typically needs to be thicker than standard patio or walkway flatwork because it carries vehicle loads — including delivery trucks and service vehicles that are heavier than a typical passenger car.
- Expansion and control joints: The approach section needs properly placed joints to manage thermal expansion and prevent random cracking, especially at the transition between private and public concrete.
- Positive drainage: The approach should be graded so water drains toward the street, not back toward your garage or the sidewalk. On flat lots this is straightforward. On slopes it requires some thought.
- Matching finish: If your existing driveway has a broom finish, exposed aggregate, or any decorative treatment, the approach should match as closely as possible. A mismatched finish at the street is a visible reminder that the work wasn’t fully thought through.
What to Watch Out for When Hiring for This Work
On the SF Peninsula, there’s a persistent category of low-bid concrete work that looks fine in the estimate and falls apart in execution. The driveway approach is a particularly common place for corners to be cut, because homeowners don’t always know what the City standard requires and a visually acceptable pour can pass a casual glance even if it’s under-spec.
The most common shortcuts we see: thin pours (4 inches instead of 6), no base compaction, missing expansion joints at the curb line, and approach work done without a permit. These don’t just create inspection problems — they create maintenance problems that come back within 3 to 5 years, often right around the time the contractor is long gone.
Checking a contractor’s license through the California CSLB and asking for references from similar permitted jobs in your city are the most straightforward ways to filter this out. A contractor who’s been doing permitted right-of-way work in Redwood City for years will have a track record with the City’s inspection staff — and that’s worth asking about.
You can browse examples of our completed projects in the project gallery to get a sense of the finish quality and scope we typically work at.
Frequently Asked Questions
Do I need a permit just to replace my existing driveway approach with the same size and material?
In most cases, yes — because the work is in the public right-of-way, an encroachment permit is required even if you’re doing a like-for-like replacement. The permit ensures the new work meets current City standards, which may have changed since the original approach was poured.
Who is responsible for the driveway approach — the homeowner or the City?
In Redwood City and most San Mateo County cities, the driveway approach is in the public right-of-way but the maintenance and replacement cost is the homeowner’s responsibility. The City sets the standards and inspects the work, but you pay for it.
Can I widen my driveway approach at the same time I replace my driveway?
Yes, but widening the curb cut is a more involved process than a straight replacement. It typically requires a separate review, may need Planning Department input depending on the extent of the change, and the City will have maximum width limits based on your lot frontage.
How long does it take to get an encroachment permit in Redwood City?
Timing varies, but for a straightforward driveway approach replacement, encroachment permits in Redwood City are often issued within one to two weeks. More complex projects or those requiring curb modifications can take longer. Your contractor should factor permit lead time into the project schedule.
What happens if the contractor damages the existing curb or sidewalk during the project?
Any damage to public infrastructure during the project is typically the contractor’s responsibility to repair as part of the permitted scope. This is another reason to work with a licensed contractor who carries proper insurance — if something goes wrong, you’re not left holding the repair bill.
Ready to Talk Through Your Driveway Project?
Peninsula Concrete Contractors, Inc. has been doing permitted concrete work in Redwood City and across San Mateo County since 1979. We handle the encroachment permit process, work to City standards, and coordinate the inspection — so you don’t have to figure it out as you go. If you’re planning a driveway replacement or approach repair, we’re happy to take a look and walk you through exactly what’s involved for your specific property and location.
