Garage Door Modifications for ADU Conversions & Soft-Story Retrofits
Converting the garage into an ADU? Reinforcing a soft-story building? Somewhere in your contractor's plan is a line item nobody owns: the garage door itself. That's us — removal, downsizing, or a new door fitted to a reinforced opening, coordinated with your GC and engineer across San Francisco and the Bay Area.
Converting a garage to an ADU, or doing a soft-story seismic retrofit? The garage door itself is a scope item your contractor usually subs out — removing the door for an infill wall, downsizing to a single bay, or fitting a new door to a steel-reinforced opening. We handle exactly that door scope across San Francisco and the Bay Area, coordinating with your GC or engineer.
What does it cost in the Bay Area?
| Door removal for conversion / infill | $250 – $600 |
| Downsize: new smaller door + reframe coordination | $1,400 – $3,200 |
| New door fitted to retrofit-reinforced opening | $1,200 – $3,500 |
| On-site scope consult with your GC | Free |
Typical San Francisco Bay Area ranges (parts + labor), last updated June 2026. You get an exact, upfront quote before any work begins — call (415) 650-4823 or book online.
Why the garage door matters in these projects
Soft-story retrofits: the big garage opening is the structural weak point these projects exist to fix — a wide hole at street level with a building on top. The usual remedy is a steel moment frame around that opening. The frame changes the opening's exact width, height and depth, which changes the door, the track geometry and where an opener can live. A door company that shows up only after the steel is in often finds an opening no standard door fits.
ADU garage conversions: San Francisco's ADU programs let ground-floor garage space become housing, and the design question is always what happens to the curb-facing door: remove it for an infill wall and windows, keep it as a non-operating facade panel, or split a tandem garage so the front bay keeps a working (narrower) door for parking and storage.
Who does what
| We handle (the door scope) | Your GC / engineer handles |
|---|---|
| Door + hardware removal, salvage or disposal | Structural engineering and the steel/framing work |
| Downsizing: new narrower/shorter door for a split bay | Opening reframe, infill walls, windows |
| New door, track and springs fitted to the reinforced opening | Permits, plan sets and city inspections |
| Opener relocation or replacement (incl. smart openers and low-headroom wall-mounts) | Electrical rough-in for the opener circuit |
| Weather-sealing the new, smaller bay | Waterproofing of the new wall assembly |
| Dimension & clearance consulting at design time (free) | Overall project schedule |
We're the trade partner for the door scope — not a general contractor, and not your structural engineer. That division is exactly why this page exists: the door scope usually falls between trades.
Three patterns we see across San Francisco
The Sunset / Richmond tuck-under split
Classic west-side rowhouse, two-car tandem garage under the living room. The conversion keeps the front third as parking behind a new single 8-foot door; the back becomes the ADU behind an insulated wall. We supply and fit the narrower door, re-spring it for its new weight, and seal the bay so the ADU wall behind it stays dry in fog season.
The Marina-district moment frame
Soft-story retrofit in a liquefaction-zone building: a steel frame shrinks the original opening by inches in every direction. We measure off the engineer's drawings before fabrication, confirm a standard door size fits the post-retrofit opening (saving custom-door money), and refit door, track and a wall-mount opener after the steel goes in.
The Excelsior duplex bay split
One wide opening becomes two: a working single door for the garage that remains, an infill section for the new unit. Two trades' worth of coordination on one header — our part is making the surviving door operate like it was always built that way.
ADU & retrofit door FAQ
Do I need a permit for this work?
The project does — ADU conversions and soft-story retrofits are permitted, engineered projects run by your contractor or design professional. Our garage-door scope rides inside that permit set. What we bring is door-specific knowledge early: opening dimensions, header clearances and hardware space that save redesign later.
Can my existing door be reused after a soft-story retrofit?
Sometimes. If the new steel moment frame keeps a similar opening size, a sound existing door can often be refitted with new track geometry. When the reinforced opening shrinks — common — a new correctly-sized door usually beats cutting down the old one, and we'll price both honestly.
When should the garage door company get involved?
At design time, before framing is finalized. Ten minutes with your GC or engineer about clear opening width, headroom for the new track and where the opener lands prevents the classic problem: a beautiful reinforced opening that no standard door size fits.
We're converting to an ADU but want to keep some parking — options?
The common pattern in SF rowhouses: split a two-car tandem bay — the front keeps a new, narrower single door for parking or storage, the back becomes conditioned ADU space behind an insulated infill wall. We size and install the narrow door and weather-seal the new bay.
Does removing the garage door hurt resale value?
It's a real trade-off: in most SF neighborhoods, off-street parking carries serious value, but a permitted ADU usually appraises higher than the parking it replaced. That's a conversation for your agent and appraiser — our job is making whichever choice you make look factory-built, not retrofitted.
Planning a full door replacement as part of the project? See new garage door installation for styles, insulation and costs — or start with a free on-site scope consult alongside your GC.
