Custom homes, architect‑led ADUs, and seamless Home Additions in Mill Valley. We handle submittals and coordinate with your selected engineer when required.
Steep slopes, tree protection, and access constraints define Mill Valley projects. Terra Buildr delivers refined construction with predictable milestones — from feasibility and submittals to a clean hand‑off.
Architect‑led design‑build with transparent timelines and premium finishes.
High‑performance envelopes, premium glazing and bespoke millwork.
View Page →
Luxury ADUs designed to harmonize with your home and landscape.
View Page →
Seamless expansions that elevate daily living and add value.
View Page →Premium, on‑site studios that complement Mill Valley homes.
Build Process
A disciplined, high‑end process: clear milestones, tidy staging, and a luxury finish that feels original to the home.
We confirm setbacks, access, utilities, and tree protection, then prepare planning/building submittals. When engineering is required, clients select their own engineer and we coordinate closely.
Cladding alignments, reveal patterns, and glazing rhythms tuned to your residence. Level‑5 drywall and premium finishes inside.
Compact crews with tidy staging and milestone tracking. Clear communication at each phase.
Punch‑list, documentation, and a clean hand‑off so your new space feels move‑in ready.
About
We believe luxury is precision, not excess. Terra Buildr delivers new homes, ADUs and additions with disciplined detailing and a quiet, refined finish. Our team pairs architecture, scheduling and on‑site execution to make complex Mill Valley builds feel simple.
Architect‑led. Tier‑1 craftsmanship. Predictable execution. A finish that feels original to the home.
Design and constructability move together — faster approvals, fewer changes, higher fidelity.
Process →High‑performance envelope, premium glazing, level‑5 drywall, and bespoke millwork as standard.
See Highlights →Compact crews, tidy staging, milestones you can track, and proactive communication.
Get a Quote →Discipline, communication, and refined results — across custom homes, ADUs and additions.
“Permits were smooth and the on‑site team kept everything tidy. Our ADU looks like it was always part of the property.”
“They coordinated seamlessly with our engineer. The addition blends perfectly — neighbors thought the house was built that way.”
“Terra Buildr delivered exactly what we envisioned — a quiet, elegant home with impeccable detailing. Communication was exceptional.”
Yes. We prepare planning/building submittals and manage the permit process. When engineering is required, clients select their engineer and we coordinate closely.
No. We don’t provide engineering in‑house. We coordinate with your chosen engineer to keep schedules predictable.
Blithedale Canyon, Homestead Valley, Almonte, Scott Valley, Tamalpais Valley and more.
Choose a project type and approximate size to see a rough range. We’ll confirm specifics after a site review.
Tell us about your site and goals. We’ll recommend the right approach and provide a detailed estimate.
Quick side‑by‑side of our signature pods. Pricing shown is per square foot.
| Model | Use Case | Key Features | Starting Rate |
|---|---|---|---|
| Core | Office / Studio | 72×80 door, 24×48 + 36×36 windows, insulated & finished interior | $550/sq ft |
| Apex | Modern profile | Lean‑to roof, transom window, premium glazing | $550/sq ft |
| Twin Peaks | Dual zones | L‑shaped plan, privacy separation | $550/sq ft |
| Nova Studio | Creative / Pro | Generous glazing, pro‑grade interiors | $650/sq ft |
