660 sq ft ADU Model
660 SF ADU Model (Wood Framed + Exterior Insulation)
A smart-size ADU for family, rental, or a private backyard studio
Our 660 sq ft model is a proven layout that delivers comfortable living in a compact footprint. It’s built with traditional wood framing and upgraded with continuous exterior insulation for better comfort and efficiency.
Great for:
- In-law suite / family space
- Long-term rental
- Guest house / backyard studio
- Pool house with bathroom
Construction type: Traditional wood framing (walls + roof)
Energy upgrade:
Exterior insulation (continuous insulation for better temperature control and reduced drafts)
Foundation option: Post & beam/pier foundation (budget-friendly and great for many backyards)
Why exterior insulation matters (simple):
- Helps reduce hot/cold spots
- Improves comfort
- Can lower heating/cooling costs
- Adds a “tight” feel to the home
Interior layout (typical)
The 660 model is flexible. Most clients choose one of these:
Option A — Open Studio Layout
- Open living/sleeping area
- Full bathroom
- Kitchen wall + dining area
Option B — 1 Bedroom Layout
- Separate bedroom
- Living room + kitchen
- Full bathroom
(Layouts can be adjusted depending on your goals and city requirements.)
Heating & Cooling
We typically use A Two units
split system (efficient heating + cooling).
This is a great fit for ADUs because it’s:
- energy efficient
- quiet
- simple to install
- strong performance for small spaces
660 SF Pricing Options (3 Paths)
We price this model in three build levels, so you can match your budget:
1) Shell Package — $50k–$53k
Includes:
- Post & beam foundation
- Framing + roof and wall sheathing
- Basic structural build
- Permit drawings/engineering coordination
Not included:
- Utilities/site work
- Doors/windows materials (unless specified)
- Interior finishes, plumbing, electrical, HVAC
2) Hybrid Package — $84k–$101k
Includes:
- Everything in Shell
- Exterior dry-in scope (final scope depends on selections)
- Doors/windows installed (if included in scope)
- Selected rough-ins (based on plan)
Not included:
- Some interior finishes (scope-based)
- Final utility connections/site work
3) Turnkey Package — $168,900
Move-in ready. Includes:
- Finished interior
- Kitchen + bathroom
- Plumbing + electrical
- HVAC (mini-split)
- Ready for final inspection (scope-based)
What affects final pricing (quick + honest)
Final numbers can change based on:
- Utility distance (trenching runs)
- Site access (tight backyards vs open access)
- Finish level (basic vs upgraded)
- City requirements (each city varies)
Call to action
Want the fastest accurate estimate?
Send:
- City + address (or nearest cross streets)
- Budget range
- Use case (family/rental/office)
…and we’ll recommend the best path: Shell, Hybrid, or Turnkey.
What’s included in the structure (core build)
750 SF Model (2-Bedroom Size)
More room for family, rental, or long-term living.
Our 750 sq ft model is ideal when you need a true 2-bedroom-size ADU for family living or rental income — still compact, but with more flexibility.
Typical layout (common approach)
- 2 bedrooms
- 1 bathroom
- Living room + kitchen area
(Layouts can be adjusted based on your site and city requirements.)
Typical heating & cooling
We typically use a mini-split system for efficient heating and cooling.
Shell — $57k–$61k
Includes: post & beam foundation, framing + sheathing, permit drawings/engineering coordination
Not included: utilities/site work, doors/windows materials (unless specified), interior finishes, plumbing/electrical/HVAC
Hybrid — $95k–$115k
Includes: Shell + exterior “dry-in” scope (scope-based), doors/windows installed (if included), selected rough-ins (scope-based)
Not included: some interior finishes (scope-based), final utility connections/site work
Turnkey — $135k–$155k
Move-in ready: finished interior, kitchen + bath, plumbing + electrical, HVAC (mini-split), completed to final inspection requirements (scope-based)
What Impacts Final Pricing (Quick + Honest)
Final pricing can change based on:
- Utility distance (trenching runs)
- Site access (tight backyard vs open access)
- Finish level (basic vs upgraded)
- City requirements (each city varies)
Ready for a Fast Ballpark?
Send:
- City + address (or nearest cross streets)
- Budget range
- Intended use (family / rental / office)
…and we’ll recommend the best path: Shell, Hybrid, or Turnkey.
Optional upgrade (strong suggestion)
