Fog, parapets and shared walls on San Francisco rowhouses
Attached houses leak at the edges. A rowhouse has a main flat or low-slope roof, a parapet on each side where it meets the neighbor, and often a light well cut into the middle. Every one of those transitions is flashing, and flashing is where water gets in. We look at parapet caps, drain bowls, seams and light-well curbs before we look at the middle of the roof.
Fog matters here. Districts such as the Richmond and the Sunset stay damp through summer mornings, so debris and drains hold moisture long after a storm. Low-slope roofs that pond water age faster, and a clogged drain turns a small stain into a soaked ceiling.
Pacific Heights Victorians and other older San Francisco roofs
Older Victorians in Pacific Heights and similar neighborhoods carry sloped front roofs, flat rear sections and decorative trim that complicates flashing. Many were re-covered over the decades, so we check layers at the eaves. A roof with two applications already cannot take another, which makes the job a tear-off. Rear flat sections of these houses are the common failure.
Matching the look is part of the plan. Planning review can apply to older or landmark buildings, and sf.gov requires photos of the existing roof for landmark historic buildings. Ask Planning before changing color or profile on a visible roof plane.
Roofing services for San Francisco homes
- Roof Repair
Leaks on attached houses usually trace to a parapet cap, a light-well edge or a shared-wall flashing rather than the middle of the roof, so the repair is targeted and photographed.
- Roof Replacement
A full replacement on a rowhouse is planned around a neighbor's wall, a narrow frontage and a permit that is filed with sf.gov, with a change order if decking is found rotten.
- Flat Roofing
Most San Francisco rowhouses carry a low-slope or flat main roof, and fog keeps its seams and drains working harder, so drain bowls and laps get checked first.
- Skylights
Skylights and light wells bring daylight into deep attached floor plans, and each curb is a leak point to reflash. On one Alameda job three skylights were resealed instead of replaced.
- Emergency Roof Repair
A storm leak on a hillside block gets temporary protection first, and the permanent fix follows once the roof is dry and street space for staging has been arranged.
- Roof Flashing Repair
Parapet caps, counterflashing at shared walls and light-well edges are where an attached house takes on water, so a flashing-only repair is often the whole fix on a rowhouse.
- Historic Home Roofing
Victorians in neighborhoods such as Pacific Heights can draw Planning review, and sf.gov asks for photos of the existing roof on landmark buildings, so the look is settled before anything is ordered.
How San Francisco reroof permits work
Because San Francisco is a consolidated city and county, there is one permit authority, the Department of Building Inspection, and no separate county desk. Reroofing with no plans can be applied for online through PermitSF. Replacing framing or roof sheathing and decking is different, and that kind of work goes over the counter at the Permit Center according to the City's June 2026 update. Aged decking is a real possibility on an older house, so ask whether the estimate covers a change order if decking is found rotten.
Whoever files, the estimate should name that party, and the City can verify it.
Crossing the Bay Bridge: scheduling and street space
After the office books a time, Wayne or Pedro often comes out to inspect. The drive from Webster St is about 27 minutes over the bridge when traffic cooperates, which at commute hours it rarely does. Book mid-morning if you can.
Staging is the other half of the plan. On a block with no loading zone, ask in advance about a street space waiver and where the dumpster will go. Updates, photos and the final walkthrough follow the same routine as any other job.
San Francisco coverage from across the bay
We cover San Francisco from Webster St, and the Bay Bridge sets the schedule. Our 4.9 stars from 60 Google reviews are on the reviews page. For a nearby comparison of an East Bay hill city, see Oakland.
