Short answer: A typical Bay Area roof replacement takes a few weeks from first inspection to final sign-off, but only a few days of that is work on the roof. Most of the calendar goes to the estimate and contract, the reroof permit, and ordering materials. Weather, hidden decking damage and inspection scheduling are the usual delays.
Key takeaways
- The roof work itself is usually measured in days. The paperwork is measured in weeks.
- Your city’s reroof permit and final inspection set much of the pace.
- Material lead times vary by product. Tile and specialty colors can take longer than stock shingles.
- The rainy season from November through March adds weather days. Dry months are easier to schedule.
The stages at a glance
| Stage | What happens | What sets the pace |
|---|---|---|
| Inspection and estimate | Roofer inspects, measures and sends a written estimate. | Your schedule and the roofer’s response time. |
| Contract | Scope, materials, colors and payment schedule agreed in writing. | How quickly decisions get made. |
| Permit | Roofer applies for the reroof permit. | Your city’s process. |
| Materials | Products ordered and delivered. | Supplier stock and product type. |
| Installation | Tear-off, deck repairs, underlayment, flashing, roofing. | Roof size, complexity, weather. |
| Final inspection | City inspector signs off. | Inspector availability. |
Stage 1: Quote and contract
It starts with an inspection. A good roofer gets on the roof (or uses a drone where walking is unsafe), checks the attic for staining and ventilation, and measures every slope. You should get a written, itemized estimate, not a number on a business card. We aim to reply the same business day and send the written estimate after the inspection.
Take the time you need to compare bids. Our guide to comparing roofing quotes helps you line them up. Once you sign, California gives you a right to cancel a home improvement contract within three business days (senior homeowners may have additional protection), so most contractors schedule the permit after that window.
Stage 2: Pulling the permit
Most Bay Area cities require a reroof permit and a final inspection. Some issue reroof permits over the counter or online in a short time; others take longer, especially for homes in historic districts, HOAs, or high fire hazard zones where the material has to meet Class A fire rating requirements. Title 24 cool-roof rules can also apply to some reroofs, which affects product selection.
We pull the permit for you. Our roofing permits page explains the process, and our Bay Area roofing permits guide goes into more detail.
Stage 3: Material delivery
Standard asphalt shingles in common colors are usually easy to get. Concrete or clay tile, metal panels, specific designer shingle colors and some flat-roof membranes can take longer. If you have your heart set on a particular color, decide early and ask the roofer to confirm availability before the start date is set.
Materials are typically delivered a day or two before work starts, often loaded directly onto the roof with a boom truck. On narrow San Francisco streets, that may need a parking permit or a curb space plan.
Stage 4: Installation days
For a typical single-family home, the hands-on work runs from a day or two on a simple roof to a week or more on a large, steep or complex one. A rough sequence:
- Protection. Tarps over plants, plywood over AC units, a dumpster placed.
- Tear-off. Old roofing removed to the deck, one section at a time so the house is never left open overnight.
- Deck inspection and repair. Soft or damaged sheathing replaced. This is where surprises show up. See our guide to roof decking.
- Underlayment and flashing. Drip edge, membrane in valleys and around penetrations, step and counter flashing.
- Roofing. Shingles, tile, metal or membrane, ridge and vents.
- Cleanup. Debris hauled, nails picked up with a magnet sweep, gutters cleared.
Some cities require a mid-job inspection of the deck or underlayment before roofing goes on. Your roofer should build that into the schedule.
What to expect at home on work days
Tear-off is the loudest and messiest part of the job. Expect hammering, debris sliding into a dumpster or truck, and some dust in the attic. If you store things in the attic, cover them with sheets or move them before the start date. Pictures on walls directly under the roof can shake loose, so take down anything fragile on the top floor.
The crew will need access to an outdoor outlet, a clear path for materials and a place for the dumpster or truck. On attached San Francisco row houses, we coordinate with neighbors so debris and ladders do not block their entries. At the end of each day, any open section of roof is covered and weathertight, and the yard is cleaned of loose nails. If anything about the schedule changes because of weather or a deck repair, you should hear it from the project lead the same day, not discover it when nobody shows up.
Stage 5: Final inspection
When the roof is finished, the city inspector checks the work and signs off the permit. Keep the signed permit with your house records; buyers and insurers may ask for it. Your workmanship warranty paperwork belongs with it. Our warranty page explains what we cover.
What causes delays
- Rain. Atmospheric-river storms can shut down roofing for days at a time between November and March. A responsible crew will not tear off with rain in the forecast.
- Hidden damage. Rotted decking or rafters found at tear-off adds work and sometimes a conversation with the inspector.
- Permit backlogs. Varies by city and season.
- Material substitutions. A discontinued color means a new choice.
- HOA approval. If your HOA must approve materials or colors, start that first. See our HOA approval guide.
Tips to keep your project on track
- Choose materials and colors before signing, and get them named in the contract.
- Clear the driveway and move cars on install days.
- Tell neighbors, especially on shared driveways or attached SF row houses.
- Book during the dry season when you can. Late spring through early fall is the easiest window.
- Respond quickly to permit or HOA questions.
We replace roofs across the region, including San Francisco, Fremont and Concord.
Frequently asked questions
How many days does a roof replacement take?
The work on the roof usually takes from a day or two on a simple home to a week or more on a large or steep one. The full project, including the permit and materials, takes longer.
Do I need to be home during the roof replacement?
No, but you need to be reachable. Keep pets inside, move cars, and expect noise during tear-off.
Can a roof be replaced in the rainy season?
Yes, with careful scheduling. Crews tear off only what they can dry in the same day and watch the forecast closely. Dry-season jobs are easier to schedule.
Who schedules the final inspection?
The roofer who pulled the permit should schedule it and meet the inspector. We handle that for every reroof we permit.
Planning a replacement? We will inspect the roof, explain the schedule for your city and give you a written estimate. Request a free inspection and written estimate or call (415) 410-7917.
