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Serving South San Francisco, CA and surrounding areas. (650) 822-6266
Keystone South SF Asphalt Paving has served Colma since 2015, handling parking lot paving, driveway repair, and commercial surface work for businesses on El Camino Real and homeowners throughout the town - and we know the difference between the two sides of Colma well. We reply to every estimate request within one business day and stand behind what we install.
El Camino Real is one of the busiest commercial strips in San Mateo County, and the parking lots serving Colma's car dealerships, retail centers, and service businesses take a beating from constant vehicle traffic. Our parking lot paving covers full lot installations and resurfacing for commercial properties along this corridor, with ADA-compliant layout, proper slope for drainage, and line striping completed as part of the project.
Colma's residential streets are modest in scale, and most homes date from the mid-20th century - which means many driveways are original pours from the 1950s and 1960s that have gone through decades of wet winters and dry summers. When the clay soils under those driveways have shifted enough that the surface is uneven or crumbling, a new driveway is a straightforward investment that adds curb appeal and prevents ongoing damage to vehicles.
California requires commercial parking lots to maintain legible ADA-compliant striping, and Colma's high-traffic lots along El Camino Real and near the 280 Metro Center fade faster than lower-volume properties. Fresh striping after a seal coat or resurfacing job keeps the lot compliant and gives customers a clear, professional first impression of your business.
Colma sits in the Merced Valley, a natural wind and fog corridor between San Bruno Mountain and the Santa Cruz foothills. That persistent fog moisture keeps asphalt surfaces damp between rainstorms and accelerates oxidation of the binder, which makes cracks develop faster here than in drier locations. Sealing cracks early - before the wet season arrives - prevents water from reaching the sub-base and turning a surface problem into a full replacement.
Colma's afternoon fog and wind dry out asphalt binder even without direct sun or rain, a pattern that makes regular sealcoating more important here than in sheltered inland locations. A sealcoat every three to five years restores surface flexibility, replenishes the binder oils, and keeps the pavement from turning brittle and cracking ahead of schedule - both on residential driveways and on commercial lots along the main corridors.
Potholes in Colma commercial lots form quickly when water penetrates a surface crack, softens the clay-heavy sub-base material, and heavy vehicles collapse the weakened surface. A proper pothole repair cuts out the failed area, recompacts the base, and fills with hot-mix asphalt rather than a cold patch that will pop out again in the next wet season - which is the only repair method that actually holds in the Bay Area's climate.
Colma has an unusual split: one of the smallest residential populations of any incorporated city in San Mateo County, paired with one of the densest and highest-traffic commercial strips on the Peninsula. The commercial properties along El Camino Real - car dealerships, shopping centers, and the retail corridor - generate constant vehicle traffic on their parking lots, driveways, and service lanes. That volume means pavement wear happens faster than a standard maintenance schedule accounts for, and letting cracks or deterioration slide for a season or two can turn a manageable resurfacing project into a full replacement. For commercial property managers here, staying ahead of pavement maintenance is simply cheaper than reacting to failure.
On the residential side, Colma's older housing stock - most of it built in the mid-20th century on Peninsula clay soils - means many homeowners are dealing with original driveways that have been through 50 or more years of seasonal expansion and contraction. The USGS has documented that clay soils in this part of the San Francisco Peninsula expand significantly when wet and shrink when dry - a cycle that pushes up on concrete and asphalt from below with every wet season. Add the wind and fog exposure common in Colma's valley-gap location, and pavement here simply ages faster than it would in a drier, more sheltered location.
Our crew works throughout Colma regularly, and we understand the local conditions that affect asphalt paving work here. Permit requirements for work that touches the public right-of-way in Colma are handled through Town Hall at 1198 El Camino Real - and because Colma operates as a small municipality, the permit process there tends to move faster than in larger surrounding cities. For commercial work along the El Camino Real corridor, we plan around business hours and dealership schedules to minimize access disruption, since closing a lot entrance during business hours is not a realistic option for most Colma operators.
Colma borders Daly City directly to the north and west, and the two cities share the same fog corridor and clay soil conditions that affect paving work throughout this part of the Peninsula. We serve both communities and can handle projects that cross the city boundary without scheduling complications. If your property is near the Serramonte area or the hillside streets on the east side of town closer to San Bruno Mountain, we know that terrain and what it asks of a paved surface.
Reach us by phone or through the online contact form. We reply within one business day and ask about the property type and job scope so we can send the right crew - residential driveway or commercial lot, we staff accordingly.
We walk the pavement, check drainage, measure, and assess the base condition before quoting. You receive a written estimate that itemizes the work - no vague totals that balloon after the job starts. This is also when we confirm whether any permit is needed for your project.
We schedule around dry weather and your access needs - including phased lot work for active commercial properties on El Camino Real. Most residential driveways in Colma are completed in one day. Commercial resurfacing projects may take two days, with line striping added after curing.
When work is done, we walk the finished surface with you and provide curing instructions. If anything needs a follow-up within the first 30 days, we return at no additional cost to address it.
We serve Colma businesses and homeowners year-round. No obligation. We reply within one business day.
(650) 822-6266Colma is a small incorporated town in San Mateo County, sitting at the natural gap of the Merced Valley between San Bruno Mountain to the east and the northern foothills of the Santa Cruz Mountains to the west. With a residential population of around 1,500 to 1,700 people and a land area of less than 2 square miles, it is one of the most compact municipalities in the county. Colma is widely known as the "City of Souls" - a result of San Francisco relocating its cemeteries here starting in the early 1900s. Today, approximately 73% of Colma's total land area is covered by its 17 cemeteries, which has shaped both its character and its land-use pattern in ways found nowhere else in the Bay Area. For a thorough overview, the Colma, California Wikipedia article covers the town's history and geography in detail.
Despite its size, Colma punches well above its weight commercially. El Camino Real runs through the center of town and anchors one of the highest concentrations of car dealerships in Northern California, alongside the 280 Metro Center - recognized as one of the first large-format retail power centers in the country when it opened in 1986. Town Hall sits at 1198 El Camino Real, and the town operates its own police department, giving Colma a full municipal identity despite its small scale. We also serve the neighboring communities of South San Francisco to the south and Millbrae further down the Peninsula - both areas with similar pavement conditions and the same seasonal climate patterns that affect paving work throughout this part of San Mateo County.
Durable concrete curbs and sidewalks to complete your project.
Learn MoreKeystone South SF Asphalt Paving serves Colma businesses and homeowners with parking lot paving, driveway repair, and commercial surface work. Call for a free estimate or fill out the form - we respond within one business day.