A 23-square shingle reroof on a single-story Mountain View home, documented day by day: tear-off started October 22, the finished Owens Corning cool roof was photographed October 27, and the City of Mountain View finaled the permit on October 28 — with the water-stained decking found underneath replaced along the way. Total cost: $21,155 including the permit.
How Long Does a Roof Replacement Take in Mountain View?
About one work week for a typical single-story home. On this Mountain View project the crew opened the roof on October 22, and the finished Owens Corning Title 24 cool-roof system — 23 squares in Oyster Shell — was complete by October 27, with the City of Mountain View finaling the permit inspection the next day, October 28. That week included tear-off and haul-away, replacing the water-damaged sections of decking with new half-inch OSB, synthetic underlayment with peel-and-stick at the sensitive areas, new drip edge, vent flashings and code vents, and the full shingle system with new ridge caps. Larger or more cut-up roofs take longer; a straightforward ranch like this one is a five-day story from first shovel to city sign-off.
An Original Roof at the End of Its Service Life
Ivana’s home is a classic single-story Mountain View ranch — wide, simple planes and a big attached garage. The roof inspection in late September told a familiar story: shingles shedding granules down to the mat, courses cupping and cracking, and the metal on the roof — flues and vent flashings — rusted through. None of it was an emergency yet, and that was exactly the point: replacing a roof in late October, on the homeowner’s schedule and before the rains, beats replacing it in January after a ceiling stain forces the issue.
Five Days, Photographed From the Air
Tear-off began October 22, and with the old roofing gone the deck could finally be judged honestly. Most of it was sound; the sections that weren’t — including a dark, water-stained area where moisture had been getting through the old roof — were cut out and replaced with new half-inch OSB, exactly the contingency the contract priced in advance. From there the roof dried in fast: synthetic underlayment with cap nails, peel-and-stick membrane in the valleys and sensitive areas, new metal drip edge, new vent flashings and low-profile code vents.
By October 24 the crew was laying Owens Corning shingle courses over the underlayment, and on October 27 the finished roof was photographed from the air — Oyster Shell field, new ridge caps, every flashing and vent base coated to prevent rust. The City of Mountain View finaled the permit on October 28.
Before vs. After
| Feature | Before | After |
|---|---|---|
| Roof covering | Original shingles, granule loss and cracking, 23 squares | Owens Corning Title 24 cool-roof shingles in Oyster Shell |
| Decking | Water-stained sections hidden under the old roof | Damaged areas replaced with new half-inch OSB |
| Flashings & vents | Rusted flues and original flashings | New drip edge, vent flashings, low-profile code vents |
| Energy performance | Dark, non-reflective worn shingle | Rated cool roof, Title 24 compliant |
| Timeline | — | Tear-off Oct 22 → finished Oct 27 → permit finaled Oct 28 |
| Cost | — | $21,155 including the $658 city permit |
What This Means for Mountain View Homeowners
Mountain View’s ranch-home neighborhoods were largely roofed and re-roofed in waves, which means whole streets hit end-of-life together — and the difference between a planned replacement and an emergency one is mostly about who moves first. A planned October reroof gets done in a week at a contract price, with decking surprises handled as they’re found and the city’s final inspection wrapped before the first storm. The permit record on this one tells the story better than any ad could: opened, re-decked where needed, re-roofed, and finaled inside a week. If your Mountain View roof is showing the same granule loss and rusted metal this one was, the cheap moment to act is now — see our Mountain View roofing page or the full project gallery.
Mountain View Roof Replacement — FAQs
How much does a roof replacement cost in Mountain View?
This 23-square project cost $21,155 including the $658 city permit — a complete tear-off, decking repairs in new half-inch OSB, synthetic underlayment, new flashings and vents, and an Owens Corning Title 24 cool-roof shingle system. That’s roughly $920 per square all-in. Your number moves with roof size, pitch, and deck condition — see our Bay Area roof replacement cost guide for the ranges we see.
Does Mountain View require a cool roof for a reroof?
Most reroofs here need to meet California’s Title 24 energy code, which sets solar-reflectance requirements confirmed by the city at permit. This project used a rated Owens Corning cool-roof shingle in Oyster Shell — a light, reflective color that satisfies the code and keeps the attic measurably cooler in summer.
What happens if the roofer finds bad decking?
It should already be in the contract. This project priced decking replacement up front — replace damaged areas with new half-inch OSB — so when tear-off exposed a water-stained section, it was cut out and replaced the same day without renegotiation. Ask any bidder how decking surprises are priced before you sign; the answer tells you a lot.
Do I need a permit to replace a roof in Mountain View?
Yes — a reroof in Mountain View requires a building permit and a final city inspection. On this project the permit was part of the contract, and the city finaled the inspection on October 28, the day after the roof was finished. A finaled permit is your documentation that the work met code — it matters at resale and for insurance.
Planning a Reroof in Mountain View?
Tear-off to finaled permit in about a week, at a contract price with decking handled honestly. See more of our work in the project gallery, or get a free estimate today.
Gina K. writes about Bay Area roofing for Lifetime Roofing & Renovation, drawing on the team's 16+ years of experience and 1,000+ completed roofs across Silicon Valley.
