Our Flagship · 3 Bed · 2 Bath

1200 Sq Ft 3-Bedroom ADU

A primary suite with a walk-in closet and French doors to your own patio. Nobody's calling this a granny flat. From $540,000.

The Biggest One We Build

California caps detached ADUs at 1200 sq ft. This is that ceiling, built out properly — three bedrooms, two full baths, a primary suite with its own ensuite and walk-in closet, and French doors opening onto a private patio. Everything a real house has, minus the mortgage on a second lot.

Here's what that buys you. Top-of-market rent from tenants who treat it as their forever home. Or parents living with genuine dignity twenty steps from your kitchen. Or you, in the ADU, collecting rent on the main house. It's the same square footage as plenty of Bay Area homes selling for well over a million — sitting on land you already own.

Every model in our ADU lineup is designed, engineered, permitted and built by one design-build team. On your lot, around your home, shaped to your property. Never a factory box on a flatbed.

Model Specifications
Size
1200 sq ft
Configuration
3 Bed · 2 Bath
Ceiling Height
9 feet
Starting From
$540,000
Construction
4–5 months
Permit Approval
40–60 days
What's In It
Primary suite with private ensuite and walk-in closet · French doors from the primary to a private patio · two additional bedrooms · second full bathroom · full kitchen · open great room with dining · in-unit washer/dryer hookup · 9-foot ceilings throughout · private entrance and address · modern or farmhouse exterior
On City Fees
Larger units carry city impact fees, and we put them in writing rather than burying them in an allowance. Measured against what a full three-bedroom earns, most owners clear them well inside the first year. We pull your city's current schedule during consultation so the figure in your proposal is the real one.

A Primary Suite, Not a Primary Bedroom

That's the difference between this and everything below it. The primary gets its own bathroom, a walk-in closet, and doors straight out to a patio — a genuine suite you can retreat into. The two secondary bedrooms sit at the far end with the second bath. In between, a great room with proper proportions. Nothing about this plan is compromised for size.

1200 sq ft 3-bedroom 2-bath ADU floor plan with primary suite by California Bay Builders and Remodeling 1200 sq ft ADU interior great room with 9 foot ceilings by California Bay Builders

Shaped Around Your Property

Door swings, window placement, how each bath lays out, every finish in the building — you call it. Before a single permit drawing gets made we study your lot: where the sun lands, where the setbacks fall, how equipment gets in, which orientation gives you the best result.

Building from a proven model is what buys you a firm number and a schedule you can plan around. The structure is engineered, the Title 24 is solved, the plan has cleared plan check before. Want something drawn from scratch instead? We do that too — different scope, different timeline, and we'll lay out both so you can pick with clear eyes.

Two Looks, One Layout

At 1200 sq ft this is a building with real presence — visible from the street, from the neighbors, from every window at the back of your house. So it had better look right. Both exteriors carry the identical interior. Which one wins comes down to your existing architecture and what your city's design review will smile at, and we sort that out early.

1200 sq ft 3-bedroom ADU modern exterior elevation by California Bay Builders and Remodeling

Modern

Confident horizontal lines, dark framed glass, a roofline that stays deliberately low. At this size it reads as architecture — which is exactly the point.

1200 sq ft 3-bedroom ADU farmhouse exterior elevation by California Bay Builders and Remodeling

Farmhouse

Board-and-batten, a proper roof pitch, trim with weight behind it. Next to ranch and craftsman homes it looks like it has always belonged there.

Step Out of Bed and Into the Garden

French doors run from the primary bedroom straight out to a private patio. Coffee outside in the morning without walking through the house. It's the detail that separates a well-built ADU from a genuinely lovely one — and it's the thing every prospective tenant remembers after the showing.

1200 sq ft ADU rear elevation with French doors from the primary bedroom to a private patio by California Bay Builders and Remodeling

Who Goes All the Way to 1200

Owners who want a second home, not a second unit. When the ADU has to stand on its own — as a rental at the top of the market, or as somewhere family will genuinely want to live — this is the one.

Premium Rent, Every Month

A primary suite and a walk-in closet put this in a different listing category. You're not competing with other ADUs. You're competing with houses — and winning on price.

Parents With Real Dignity

No one wants to feel like they moved into the shed. A full suite with its own patio means they've got their own home — and you've got them close.

The Swap, Done Right

Move in yourself, rent the main house at full market. At 1200 sq ft with a primary suite, that's not downsizing — that's a smart trade with a rent cheque attached.

A Full Second Address

Permitted, its own address, three bedrooms and two baths. Appraisers count that seriously. So will buyers, whenever you decide to sell.

Long Leases, Quiet Life

Tenants who find a home this good don't go looking. Fewer vacancies, fewer turnovers, fewer weekends spent showing the place.

Room for Whatever's Next

Kids come home. Parents move in. Work goes remote. Guests stay a month. At the maximum size, the building keeps up with your life instead of limiting it.

Nine Feet, Every Model

Most accessory units get framed at eight feet because it's cheaper. We build every model at nine. On a floor plan this size the effect is unmistakable — taller glass, light reaching all the way through, ceilings that give the great room the volume it deserves. Costs us more. Included in your price. We wouldn't build it any other way.

Take the Full Tour

1200 sq ft ADU modern front elevation by California Bay Builders and Remodeling 1200 sq ft ADU rear elevation with French doors and private patio by California Bay Builders 1200 sq ft ADU farmhouse front elevation by California Bay Builders and Remodeling 1200 sq ft ADU great room interior with 9 foot ceilings 1200 sq ft 3-bedroom 2-bath ADU floor plan by California Bay Builders and Remodeling
Free · No Obligation

Let's See If Your Lot Can Take It

You might be surprised. California's ADU laws have opened up plenty of Bay Area lots that wouldn't have qualified a few years back. We come out, measure, check your setbacks and coverage, and tell you straight what fits. Pricing, inclusions, permits and financing are all laid out on our ADU page, and everything else we build is on our services page.

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