How much does an ADU cost?

Our ADUs start at $550 per square foot (minimums apply). Final pricing depends on size, utility runs, finishes, and site access.

Do you handle permits and Title 24?

Yes. We guide permitting, drawings and Title 24 energy compliance for California jurisdictions.

Can I customize the layout and finishes?

Absolutely—window schedules (including our signature transom), siding mixes, interior packages, and kitchen/bath layouts are fully customizable.

How long does construction take?

After design approval, on-site construction typically takes 6–12 weeks depending on scope, utilities, and access.

Terra Buildr

Hyper-photorealistic ADU with cedar accents and black-trim glazing in a landscaped Bay Area backyard

Luxury ADUs Designed for Bay Area Living

Premium on-site construction • Permit guidance • Transparent pricing from $550/sq ft

Get My ADU Quote Why Build an ADU?

Why Build an ADU with Terra Buildr

Increase property value, create a guest suite or rental, and keep family close — all with architectural detailing, black-trim Low-E glazing, cedar accents, and luxury interiors.

On-site construction for a perfect fit on your lot
Engineered footing foundations for slope & access
Custom layouts with full kitchen & bath
Permit & Title 24 guidance
Signature transom window & premium envelope

Start My ADU What’s Included

ADU interior with kitchen, bath, and premium finishes

ADU Inspiration

Start from a proven model and tailor it into your perfect ADU.

Core (Gable)

Classic gable form with our signature transom. Adaptable to 1-bed layouts.

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Apex model adapted as a modern ADU with lean-to roof

Apex (Lean-To)

Modern lean-to profile with expansive glazing and cedar contrast.

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Twin Peaks

L-shaped geometry for bedroom separation and privacy.

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Nova Studio

Flagship 400 sq ft studio for living: kitchen, bath, and sleeping alcove.

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What’s Included in a Terra Buildr ADU

Luxury comes standard. Upgrades available by request.

Category	Details
Foundation	Concrete footing system engineered for site slope & access
Framing	2×6 walls @ 16” OC
Envelope	Blue lap siding with cedar accents, black trim, WRB, flashings
Glazing	Signature transom window
Electrical	Recessed LED lighting, ample outlets, dedicated sub-panel as needed
Interior	Level-5 drywall, premium flooring, pro-grade paints
Kitchen & Bath	Full kitchenette, bath fixtures, tile surround options
Pricing	From $650/sq ft (minimums apply; utilities & finishes may affect total)

ADUs by City

Local permitting expertise and site-specific planning.

Atherton

Estate privacy, heritage context.

Tiburon

Hillside lots, coastal exposure.

Piedmont

Quiet streets, refined detailing.

Menlo Park

Modern additions & ADUs.

Finance Your ADU with RenoFi

Check eligibility in minutes. RenoFi considers your home’s after-renovation value. Exact APR and terms are provided by their lending partners.

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ADU FAQs

What sizes do you build?

Studios to 1–2 bedroom ADUs, typically 300–800 sq ft. We tailor to your lot, utilities, and goals.

Do you help with design?

Yes. We handle layouts, elevations, window schedules (including our signature transom), and material palettes.

Can you match my home’s aesthetic?

Absolutely—siding profiles/colors, rooflines, trims, and interiors can complement your primary residence.

How do I get started?

Open the quote modal, share your vision and address, and we’ll schedule a site review.

Ready to Plan Your ADU?

Tell us your vision. We’ll handle design, permits, and on-site construction.

Get My ADU Quote Explore Nova Studio

Get an ADU Quote