New Roof Installation for Additions, ADUs, and New Construction
The Mission District's narrow lots mean most "new roof" work here is a rear addition, garage conversion, or in-law unit tying into an existing structure — not a ground-up build. We install it right the first time.
Where This Comes Up in the Mission District
- In-law units and ADUs — increasingly common on Mission District lots, each needing its own properly tied-in roof section.
- Rear additions — a new flat or low-slope roof section extending an existing pitched roof.
- Garage-to-living-space conversions — a full roof structure where there wasn't finished roofing before.
- New construction — ground-up roofing on new-build lots, matched to San Francisco's building and energy codes.
What's Included
- Site and structural review to confirm the new section ties in correctly.
- Material selection matched to slope — pitched shingle/metal or flat TPO/modified bitumen.
- Permit filing and inspection scheduling with the City and County of San Francisco.
- Clean tie-in flashing where the new section meets the existing roof — the single most common failure point on additions done wrong.
Related Services
Flat Roofing
Most additions and ADUs need a flat or low-slope roof section.
Learn more about Flat RoofingResidential Roofing
Full-property roofing care beyond a single new section.
Learn more about Residential RoofingRoof Installation Questions
Do you install roofs on additions and in-law units?
Yes. Rear additions, garage conversions, and in-law/ADU units are common projects in the Mission District, and tying a new roof section cleanly into an existing structure is exactly the kind of work this service covers.
Can you match a new roof section to my existing roof?
In most cases, yes, for asphalt shingle. Exact color/style matches depend on what's still manufactured — we'll show you real options during the estimate rather than promising a perfect match we can't deliver.
Do new roof installations need a permit?
Yes, new roof installations on additions and ADUs go through the same San Francisco permitting process as a full replacement. We handle that as part of the project.
What's the difference between this and roof replacement?
Roof replacement is for an existing roof being torn off and redone. Roof installation covers new roof sections on additions, ADUs, and new construction where there wasn't a finished roof there before.
Planning an Addition or ADU?
Free estimate, permit handling included. We serve the Mission District and San Francisco.