Green Design and Build · ADU collection
A small home.
A world of possibility.
Find a starting point for your backyard home. Explore six ADU concepts, compare layouts, and shape a space around the way you want to live.
Explore the models
400–1,200 sq ftStarting at $100,000
Garage conversion3–8 months
Construction after permitsBuilt around your property
Site-specific plans and proposal
Choose your starting point
Make room for what comes next.
A home for family, a place for guests, or a potential rental. Compare the size and starting investment that suit your goals.
400 sq ft · Design concept
Garage 400
Studio or one bedroom
A familiar footprint. A completely new way to live. Convert an existing garage into a private home with a kitchen and bath.
From $100,000
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400 sq ft · Design concept
Studio 400
Open studio
A compact backyard retreat with a full kitchen, a comfortable living and sleeping area, and its own bathroom.
From $160,000
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600 sq ft · Design concept
Garden 600
One or two bedrooms
A little more separation and room to settle in. Explore a generous one-bedroom layout or a compact two-bedroom option.
From $180,000
Explore this model →800 sq ft · Design concept
Courtyard 800
Two bedrooms
A complete small home with space to gather, two private bedrooms, and a choice of one or two bathrooms.
From $250,000
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1,000 sq ft · Design concept
Haven 1000
Two or three bedrooms
A flexible family-sized layout with two bathrooms, an open living area, and room for guests or a home office.
From $330,000
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1,200 sq ft · Design concept
Retreat 1200
Two or three bedrooms
Our most spacious concept, designed around everyday comfort, shared meals, and private places to unwind.
From $400,000
Explore this model →Starting estimates for Los Angeles and surrounding Southern California service areas, October 2026. Final scope and price depend on your property, selected layout and finishes. Renderings illustrate proposed designs, not completed projects.
From idea to home
A clear path, from the first conversation.
- Property consultation. Discuss your goals, available space, access and utilities.
- Design and engineering. Adapt your preferred concept to your lot and establish the scope.
- Permitting. Coordinate the drawings and respond to the city’s review.
- Construction. Allow approximately 3–5 months for a garage conversion or 5–8 months for a detached ADU after permits are issued, subject to scope and site conditions.
- Final walkthrough. Review the finished work and complete the required inspections.
Know what you are comparing
Your property shapes the final price.
The model price is a starting estimate for construction. Your written proposal will itemize design, permits, construction, kitchen and finish allowances.
City fees, utility runs, electrical upgrades, demolition, grading, soils or hillside work, solar, appliances and landscaping can change the final cost.
Design and permitting time is separate from the construction estimate.
Good questions to start with.
Can a model be adapted to my property?
Yes. These concepts are starting points. The final layout, openings and exterior are developed around the site, your priorities and the required approvals.
Are these photos of completed projects?
These are original design concept renderings. Visit our project portfolio to see completed Green Design and Build work.
Is the starting price a fixed quote?
No. The final price follows a property review and a written scope of work. Garage conversions also depend on the condition of the existing structure.
What does the starting price include, and what is left out?
The starting estimate covers construction of the model as shown, with installation labor and the standard material allowances included. Site-dependent costs, city fees, utility extensions, electrical panel upgrades, solar, demolition, unusual foundations, appliances and landscaping are not included unless your written proposal lists them.
Does the starting price include design and permit fees?
No. The starting estimate is for construction only. Design and permit fees are separate and are itemized in your written proposal. Design and permitting time also comes before the construction timeline begins.
How long does it take from the first call to move-in?
Most ADU projects take six months to a year in total. Design, engineering and plan check come first. Construction then takes about 3–5 months for a garage conversion or 5–8 months for a detached ADU after permits are issued.
Garage 400 and Studio 400 are both 400 sq ft. Why do the prices differ?
Garage 400 reuses the slab, walls and roof of your existing garage. Studio 400 is a new detached building, so it needs its own foundation, new utility runs and solar panels. That is why it starts at $160,000 rather than $100,000.
Can I add a bedroom or a second bathroom to a model?
Yes. The Garden 600 two-bedroom layout adds $10,000 to the starting estimate. The second bathroom on Courtyard 800 and the third bedroom on Haven 1000 and Retreat 1200 do not change the starting estimate. Other changes are priced in your written proposal.
Are these models prefab or modular units?
No. Every model is site-built. Electrical, plumbing and HVAC are performed by licensed tradespeople under our permits, and you have one project manager from the site walk through final inspection.
Can I use a model as a home office, gym or guest house instead of a rental?
Yes. We build ADUs and garage conversions used as offices, gyms, studios and guest space as well as rentals. The layout and finishes are developed around how you plan to use the space.
What happens after I request a consultation?
We review the property, visit the site and send a written proposal within 48 hours of the site visit. You receive a 3D rendering of your design before construction begins.
Can you help with financing?
We are a builder, not a lender, but we can explain the financing paths our ADU clients typically use and provide the written feasibility summary and budget that lenders ask for. The ADU page describes the options in more detail.
Let’s explore your property
Which model feels like home?
Tell us the model you like and what you want your ADU to do. We’ll help you understand the next steps.
Request your ADU consultation