Which is bigger, the Six Sixty or the Nine Forty-Five Trio Plus?

The Nine Forty-Five Trio Plus is bigger at 945 sq ft, compared to 660 sq ft for the Six Sixty.

Which costs less, the Six Sixty or the Nine Forty-Five Trio Plus?

The Six Sixty is the lower-priced option at $309,000, which includes a permitting budget along with plans, foundation, and delivery, compared to $479,000 for the Nine Forty-Five Trio Plus. Exact permit costs are set by your city or county and confirmed in your feasibility study.

Which one delivers faster, the Six Sixty or the Nine Forty-Five Trio Plus?

The Six Sixty has the shorter typical timeline at 5 months, compared to 6 months for the Nine Forty-Five Trio Plus.

When should I choose the Six Sixty over the Nine Forty-Five Trio Plus?

Choose the Six Sixty if your priority is dependable rental income, a comfortable space for aging parents or an adult child, and the fastest, most affordable path to a finished ADU.

When should I choose the Nine Forty-Five Trio Plus over the Six Sixty?

Choose the Nine Forty-Five Trio Plus if you need three real bedrooms and two full bathrooms under one roof, room for a full family to grow into, and a layout that lives like a standalone house.

One Bedroom Rental vs Three Bedroom Family Home

Six Sixty vs Nine Forty-Five Trio Plus

The Six Sixty is a 660 square foot, one bedroom, one bath ADU priced at $309,000 with a 5 month build timeline, and it's our most popular layout. The Nine Forty-Five Trio Plus is a 945 square foot, three bedroom, two bath home priced at $479,000 with a build timeline of about 6 months. Both are efficient, all-inclusive builds with a permitting budget built in and confirmed at your feasibility study, but they're built for different goals.

At a Glance

	Six Sixty	Nine Forty-Five Trio Plus
Size	660 sq ft	945 sq ft
Bed / Bath	1 Bed / 1 Bath	3 Bed / 2 Bath
All-Inclusive Price*	$309,000	$479,000
Typical Delivery	5 months	6 months
Footprint Shape	Rectangular	L-shaped
Best For	Rental income, parents, adult children: the all-rounder.	Full families, the closest thing to a standalone house.

*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. Every price also includes plans, foundation, the factory build, delivery, utility hookups, appliances, and final inspection.

Where the Six Sixty Wins

Pick the Six Sixty for this.

● Most popular one bedroom layout at 660 square feet
● Lower entry price at $309,000 with a 5 month build
● Built for rental income, aging parents, or adult children

Where the Nine Forty-Five Trio Plus Wins

Pick the Nine Forty-Five Trio Plus for this.

● 945 square feet with three bedrooms and two full baths
● L shaped layout built for full household living
● The closest thing to a standalone house, ready in about 6 months

The Honest Verdict

How to actually decide.

If you want dependable rental income or a simple, private space for parents or a grown child, the Six Sixty gets you there fastest and for less. If you need real room for a full family, with three bedrooms and two full baths, the Nine Forty-Five Trio Plus is the closer of the two to a standalone house.

Choose the Six Sixty if: Choose the Six Sixty if your priority is dependable rental income, a comfortable space for aging parents or an adult child, and the fastest, most affordable path to a finished ADU.
Choose the Nine Forty-Five Trio Plus if: Choose the Nine Forty-Five Trio Plus if you need three real bedrooms and two full bathrooms under one roof, room for a full family to grow into, and a layout that lives like a standalone house.

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Small Lots, Entry Models Four Fifty vs The 405 Studio Efficiency or a Real Bedroom? → Studio vs One Bedroom Four Fifty vs Five Five Five A Studio to Start, or a Real Bedroom? → One Bedroom, Two Sizes The 405 vs Five Five Five A Cozy Bedroom or Room to Breathe? → One Bed, One Bath, Two Sizes Five Five Five vs Six Sixty More Room to Breathe, or the All-Rounder Everyone Picks? → Same Footprint, One Bed or Two Six Sixty vs Six Sixty Duo One Bedroom or Two, Same 660 Square Feet? → Two Bedroom ADU Comparison Six Sixty Duo vs Seven Forty-Nine Compact and Efficient, or More Room to Spread Out? →

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Still Deciding?

See which one actually fits your lot: the Six Sixty or the Nine Forty-Five Trio Plus.

Every property is different. Tell us your lot size, budget, and what you need the space for, and a real person on our team will tell you which model works, plus your exact price with permitting and site work factored in.

A shortlist of which models actually fit your lot
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Once you submit, a real person on our team reviews your property and follows up within 1 to 2 business days to book your free 30-minute call. No call center, no drip campaign, just a conversation.

After we review your property, we'll invite you out to the factory, or send a member of our team to you, whichever fits your schedule better.

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.

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