The Models

Pick the home that fits your yard.

All 14 Prefab ADU Models, 405 to 1,200 ft²

Every home is delivered fully-finished and all-inclusive, with a permitting budget built in along with plans, foundation, the factory build, delivery, hookups, appliances, and inspections.

configurations

$199K

starting all-in

405–1,200

square feet

4–9

months to keys*

*Build timelines from contract; the four-month figure is a best case on our Four Fifty, our smallest model. Local permitting timelines and costs are set by each city and county, so they're confirmed in your feasibility study. Property-specific site work such as septic upgrades or retaining walls isn't included in listed pricing, though we handle it in-house under your contract.

The Catalog

NEW

The 405 prefab ADU exterior, 405 ft² 1 bedroom

405 ft² · Rectangular

Shed or gable

1 Bed · 1 Bath5 months

The 405

$239,000 all-in

≈ $1,450/mo with $0 down*

All-inclusive*

BEST VALUE

Four Fifty prefab ADU exterior, 450 ft² studio

450 ft² · Rectangular

Shed or gable

Studio · 1 Bath4 months

Four Fifty

$199,000 all-in

≈ $1,200/mo with $0 down*

All-inclusive*

Five Five Five prefab ADU exterior, 555 ft² 1 bedroom

555 ft² · Rectangular

Shed or gable

1 Bed · 1 Bath5 months

Five Five Five

$279,000 all-in

≈ $1,700/mo with $0 down*

All-inclusive*

Six Sixty

$309,000 all-in

≈ $1,900/mo with $0 down*

All-inclusive*

BEST FOR RENTALS

Six Sixty Duo prefab ADU exterior, 660 ft² 2 bedroom

660 ft² · Rectangular

Shed or gable

2 Bed · 1 Bath5 months

Six Sixty^Duo

$339,000 all-in

≈ $2,050/mo with $0 down*

All-inclusive*

NEW · L-SHAPED

Seven Forty-Nine prefab ADU exterior, 749 ft² 2 bedroom

749 ft² · L-Shaped

2 Bed · 1 Bath5–6 months

Seven Forty-Nine

$369,000 all-in

≈ $2,250/mo with $0 down*

All-inclusive*

885 ft² · L-Shaped

2 Bed · 1 Bath6 months

Eight Eighty-Five^Duo

$399,000 all-in

≈ $2,450/mo with $0 down*

All-inclusive*

885 ft² · L-Shaped

2 Bed · 2 Bath6 months

Eight Eighty-Five^{Duo Plus}

$429,000 all-in

≈ $2,600/mo with $0 down*

All-inclusive*

Nine Forty-Five Duo prefab ADU exterior, 945 ft² 2 bedroom

945 ft² · L-Shaped

2 Bed · 1 Bath6 months

Nine Forty-Five^Duo

$419,000 all-in

≈ $2,550/mo with $0 down*

All-inclusive*

Nine Forty-Five Duo Plus prefab ADU exterior, 945 ft² 2 bedroom

945 ft² · L-Shaped

2 Bed · 2 Bath6 months

Nine Forty-Five^{Duo Plus}

$449,000 all-in

≈ $2,750/mo with $0 down*

All-inclusive*

Nine Forty-Five Trio prefab ADU exterior, 945 ft² 3 bedroom

945 ft² · L-Shaped

3 Bed · 1 Bath6 months

Nine Forty-Five^Trio

$445,000 all-in

≈ $2,700/mo with $0 down*

All-inclusive*

FAMILY-SIZE

Nine Forty-Five Trio Plus prefab ADU exterior, 945 ft² 3 bedroom

945 ft² · L-Shaped

3 Bed · 2 Bath6 months

Nine Forty-Five^{Trio Plus}

$479,000 all-in

≈ $2,900/mo with $0 down*

All-inclusive*

Twelve Hundred prefab ADU exterior, 1200 ft² 3 bedroom

1200 ft² · L-Shaped

3 Bed · 2 Bath7–9 months

Twelve Hundred

$549,000 all-in

≈ $3,350/mo with $0 down*

All-inclusive*

NEW · LARGEST

Twelve Hundred U prefab ADU exterior, 1200 ft² 3 bedroom

1200 ft² · U-Shaped

3 Bed · 2 Bath7–9 months

Twelve Hundred U

$599,000 all-in

≈ $3,650/mo with $0 down*

All-inclusive*

*Includes a permitting budget, not final permit costs. Permits and property-specific site work (septic, retaining walls, etc.) vary by property and are confirmed in your feasibility study.

Estimated monthly payment assumes no down payment and an interest-only payment at a current national average home equity line of credit rate, which is variable and will differ by lender, credit profile, and market conditions; most homeowners pay for their ADU with cash, home equity, or a line of credit secured by their existing home rather than a traditional home purchase mortgage. This is an estimate for planning purposes only, not a loan offer, a rate quote, or financial advice, and Framework First is not a lender; consult your bank, credit union, or a licensed loan officer to learn what you actually qualify for.

Pricing from our 3rd Edition catalog (February 2026).

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Head to Head · 20 Comparisons

Four Fifty vs The 405 Studio Efficiency or a Real Bedroom? Four Fifty vs Five Five Five A Studio to Start, or a Real Bedroom? The 405 vs Five Five Five A Cozy Bedroom or Room to Breathe? Five Five Five vs Six Sixty More Room to Breathe, or the All-Rounder Everyone Picks? Six Sixty vs Six Sixty Duo One Bedroom or Two, Same 660 Square Feet? Six Sixty Duo vs Seven Forty-Nine Compact and Efficient, or More Room to Spread Out? Seven Forty-Nine vs Eight Eighty-Five Duo More Privacy or More Room to Grow? Eight Eighty-Five Duo vs Eight Eighty-Five Duo Plus One Bathroom or Two? Eight Eighty-Five Duo Plus vs Nine Forty-Five Duo Plus How Much Room Do Two Private Suites Need? Nine Forty-Five Duo vs Nine Forty-Five Duo Plus One Bathroom or Two? Nine Forty-Five Duo Plus vs Nine Forty-Five Trio Plus Two Suites or Three Bedrooms? Nine Forty-Five Trio vs Nine Forty-Five Trio Plus One Bathroom or Two? Nine Forty-Five Trio Plus vs Twelve Hundred Room for a Family, or Room to Spare? Twelve Hundred vs Twelve Hundred U Same Footprint, Two Different Homes Four Fifty vs Six Sixty A Simple Studio or a True One Bedroom? Six Sixty vs Nine Forty-Five Trio Plus Steady Rental or Room for the Whole Family? Seven Forty-Nine vs Nine Forty-Five Duo Two Bedrooms: Compact or Roomy? Eight Eighty-Five Duo vs Nine Forty-Five Duo 885 or 945 Square Feet: How Much Room Do You Actually Need? Five Five Five vs Seven Forty-Nine One Bedroom or Two? Six Sixty vs Twelve Hundred The Popular All-Rounder or the Full-Size Family Home?

Every Model · Three Styles

Pick the finish that fits your home.

These are ready-made presets so you don't have to design from scratch. Want full control over every detail? The ADU Designer lets you build your own look from the ground up.

Standard · Included

Classic Craftsman

Warm woods, tapered columns, deep eaves. The default that fits any neighborhood.

Upgrade

Urban Farmhouse

Black trim, gabled roof, board & batten siding. Modern but warm.

Upgrade

Ultra Modern

Flat roof, floor-to-ceiling glass, integrated decks. Architect-level finish.

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Can't Decide?

We'll help you pick the right one for your lot.

Tell us your lot size, budget, and what you need the space for, and a real person on our team will follow up. Thirty minutes, free, no pressure.

A shortlist of which models actually fit your lot
Honest flags on anything property-specific, like slope or septic
A clear next step, whether that is a factory tour or a feasibility study
No pressure, and no obligation

Building more than one? If you're a real estate developer or investor planning multiple units, let us know in the form. We offer better pricing at volume.

“My first telephone conversation with Cathy (Owner) was one of the best, positive and kind discussions. She was thinking outside of the box and provided a possible solution like a family member. Thank you.”

Vijay Kumar

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All 14 Prefab ADU Models, 405 to 1,200 ft²

The 405

Four Fifty

Five Five Five

Six Sixty

Six SixtyDuo

Seven Forty-Nine

Eight Eighty-FiveDuo

Eight Eighty-FiveDuo Plus

Nine Forty-FiveDuo

Nine Forty-FiveDuo Plus

Nine Forty-FiveTrio

Nine Forty-FiveTrio Plus

Twelve Hundred

Twelve Hundred U

Pick the finish that fits your home.

Classic Craftsman

Urban Farmhouse

Ultra Modern

We'll help you pick the right one for your lot.

Six Sixty^Duo

Eight Eighty-Five^Duo

Eight Eighty-Five^{Duo Plus}

Nine Forty-Five^Duo

Nine Forty-Five^{Duo Plus}

Nine Forty-Five^Trio

Nine Forty-Five^{Trio Plus}