← 4201 Bloomfield Road
Inspiration · Architecture references

The look we're after

For the two-ADU compound on the north pad: open and airy, a strong indoor/outdoor flow, floor-to-ceiling glass to the northwest view, all-wood or straw-bale construction, and generous decks. Below are the firms we're talking to and the built homes we keep coming back to — each with a cost read and a detail page.

Open plan Indoor / outdoor Floor-to-ceiling glass Wood + straw-bale Decks Passive solar

For context, our own two-ADU straw-bale compound (2 × ~1,200 sqft) pencils at roughly $1.8–2.2M all-in — see the permit brief & budget. The figures below are how each comp compares.

Our concept

massing study
Two volumes joined by an open deck — the two-pavilion concept
Concept · what it might look like

Two ADUs, joined by a deck

Dogtrot · two-pavilion · barbell

Precedent typologies and conceptual drawings — plans, sections, breezeways — for two paired ADUs linked by a deck, plus the key design moves for our sloped, oak-grove pad.

6 precedentsExplore the concept

Firms we're talking to

3 options

Real candidates we've reached out to — an architect/prefab studio, a local natural-building GC, and a Bay-Area modular shop.

Sonoma weeHouse glimpsed through oak trees
Architect · prefab

Sonoma weeHouse

Alchemy Architects

The Apple design director's own house — two glass-walled modules (main + guest) on concrete plinths, at the edge of the oaks. Uncanny match for our site.

~$500–700K est.Details
Aaron Grail natural-plaster home with metal roof on a Sonoma hillside
Design-build · neighbor

Aaron Grail Construction

Sebastopol — Lone Pine Rd

Local licensed GC specializing in straw-bale and hempcrete. Practically next door — free in-person site walks.

~$450–650/sqft est.Details
Digz 900 wood-clad modular ADU with deck and sliding glass
Modular prefab · ADU

Digz 900

DIGZ2GO · Mill Valley

A 2BR/2BA, 900 sqft modular ADU with wrap-around decks and floor-to-ceiling sliding glass. Factory-built, craned on site.

$220K–$383KDetails

Built references we love

3 homes

Not for hire here — finished homes that nail the feel, materials, and siting we're chasing.

Watershed straw-bale residence at dusk with pool and decks
Architect · straw-bale

Watershed Straw-Bale

Arkin Tilt Architects

An off-grid straw-bale home in rural Sonoma that steps up the hillside. Our closest material + place match.

~$1.5–2.5M est.Details
Method M2 wood-ceilinged deck opening to a view
Prefab · modular

M2

Method Homes

Two modules joined by a glazed bridge, two decks, walls of glass — basically our two-ADU-plus-deck idea, prefabbed.

~$378K moduleDetails
Caterpillar House low on a golden California hillside
Architect · LEED Platinum

Caterpillar House

Feldman Architecture

A low, horizontal home that curves with the land — rammed-earth + glass, wood ceilings inside to out, south-facing for passive solar.

~$2–3M est.Details