New-Construction and Addition Roof Installation Done Right the First Time
Whether it's a rear addition, an in-law unit, or new construction on an infill lot, we install roofing that ties in cleanly with your existing home and meets San Francisco's building and Title 24 requirements.
Where New Roof Installation Comes Up in San Francisco
Most "roof installation" work here isn't a whole new house — it's a roof section added to an existing one:
- Rear additions — a new low-slope roof section over a kitchen or living space extension, tied into the original structure.
- ADUs and in-law units — increasingly common on San Francisco's narrow lots, usually flat or low-slope given the space constraints.
- Garage or laundry-room conversions — a new roof deck where one didn't exist before, built to current code.
- New construction infill — a full new roof system on a ground-up build.
What a New Installation Includes
- Deck and structural review before any material goes down.
- Material and profile matched to your existing roofline where relevant.
- Title 24 compliance confirmed for the new section based on slope and climate zone.
- Clean tie-in flashing and detailing where new roof meets old.
Related Services
New roof installation often connects to these services.
Flat Roofing
The most common system for additions and low-slope new sections.
Learn more about Flat RoofingShingle Roofing
Matching architectural or 3-tab shingle for pitched roof sections.
Learn more about Shingle RoofingGutter Installation
New gutters and downspouts sized for the new roof section.
Learn more about Gutter InstallationRoof Installation Questions
Do you install roofs on new additions or in-law units?
Yes — San Francisco's dense infill construction and ADU/in-law unit additions often need a new roof section tied cleanly into an existing structure, usually a flat or low-slope system given the tight lot lines involved.
Can you match a new roof section to my existing Victorian roofline?
In most cases, yes. We match material, profile, and color as closely as current products allow, and we're upfront if an exact match isn't possible so you can decide how to handle the transition.
Do new roof installations need to meet Title 24?
Yes — new construction roofing must meet California's Title 24 cool-roof standards for flat/low-slope sections statewide, and the applicable steep-slope requirements for your climate zone. We handle this as part of the install.
How long does a new roof installation take?
Timeline depends on roof size and complexity, but most single-section installs on additions or new construction take a few days once materials are on-site and staging is arranged for your street.
Planning an Addition or New Build?
Free estimate, roofing matched to your project. We serve Hayes Valley and San Francisco.