Cozy Homes for a Healthier Planet

Explore our collection of modern straw bale homes and accesory dwelling units – compact, efficient, and naturally designed.

CRAFTED WITH NATURAL MATERIALS

A Focus on Locally Sourced Living

Our Casitas redefine regenerative living. Built with locally sourced Vermont wood and straw, your Casita home is as resilient as it is contemporary in design. Personalize your interior with an optional natural clay and lime plaster finish, and embrace the healthy living environment created by sleek, non-toxic wood finishes.

We prioritize climate-friendly living and comfort, integrating advanced heating, cooling, ventilation, water, and power systems that are fossil-fuel free and all-electric. Off-grid options also available. Discover a new era of modern accessory dwelling units.

Browse our five different Casita models below.

Take a 3d tour of our Terra 600 Casita

Request a Casita Quote

Exterior shot of the Cabañita, a 300SF prefab adu kit.

Our Casitas

Read about our five models of prefabricated ADU and house kits

COMFORTABLE PRIMARY RESIDENCE

Árbol 1200

The spacious Árbol 1200 boasts 1200 square feet of conditioned living space, 3 bedrooms, an impeccably designed full kitchen and 1.5 bath, and advanced mechanicals.

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A 3D rendering of our 1200 SF prefab two story home kit.

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A 3D rendering of our 1200 SF prefab two story home kit.

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Mudroom and hallways of our 1200 SF prefab two story home kit.

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Bedroom depiction of our 1200 SF prefab two story home kit.

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Depiction of the bedroom in our 1200 SF prefab two story home kit.

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The kitchen in our 1200 SF prefab two story home kit.

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Another view of the kitchen in our 1200 SF prefab two story home kit.

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The view of the loft in our 1200 SF prefab two story home kit.

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Office/flex space in our 1200 SF prefab two story home kit.

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View from the loft in our 1200 SF prefab two story home kit.

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First-floor floor plan of the Árbol 1200 prefab two story ADU kit.

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2nd-floor floor plan of the Árbol 1200 prefab two story ADU kit.

In addition to the features included in all Casitas, the Árbol 1200 uniquely features:
- 1200 square feet of interior living space
- (1) 1st floor bedroom
- (2) 2nd floor bedrooms
- 2nd floor office/flex space, and under-eave storage space
- Full kitchen
- Swing door for bathroom for increased privacy
- Open-concept dining-living area with cathedral ceiling
- Full L-shaped stairs with landing
- Under-stair storage space
- 2 entrances: one single door entrance with covered stoop, and a full lite glass door that opens onto the sitting porch
- Mudroom entrance space provides an organized portal in and out of your home
- Storage closets
The cost of the health-conscious, climate responsive Arbol 1200 does not include site & utility construction expenses, as requirements vary by site location. Give us a call or an email to discuss your particular situation further and we are happy to help with an estimate.
The Árbol was inspired by the beloved features of the Flora model. It was created in response to customer requests for a larger, single-family home that builds on those cherished elements.

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Casitas FAQ

SPACIOUS LIVING BLOSSOMS

Flora 900

The opulent Flora 900 boasts 900 square feet of conditioned living space, an impeccably designed full kitchen and bath, and advanced mechanicals.

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A 3D rendering of our two story prefab home or ADU kit.

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1st floor plan of our 900 SF prefab home or ADU kit, the Flora.

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2nd floor plan of our 900 SF prefab two story home or ADU kit.

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A 3D rendering of the bedroom in the Flora, our 900 SF two story prefab home or ADU kit.

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A 3D rendering of the living room in the Flora, our 900 SF prefab two story home or ADU kit.

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A 3D rendering of the living room in the Flora, our 900 SF two story prefab home or ADU kit.

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A 3D rendering of the kitchen in the Flora, our 900 SF two story prefab home or ADU kit.

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A 3D rendering of the stair case and living room in the Flora, our 900SF, two story prefab home or ADU kit.

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A 3D rendering of the mud room and living room in the Flora, our 900SF, two story prefab home or ADU kit.

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A 3D rendering of the loft in the Flora,our 900SF, two story prefab home or ADU kit.

In addition to the features included in all Casitas, Flora 900 uniquely features:
- 900 square feet of interior living space
- 1st floor bedroom
- Full kitchen
- Swing door for bathroom for increased privacy
- Open-concept dining-living area
- Full L-shaped stairs with landing
- Under-stair built in shelving for integrated storage
- 2 entrances: one single door entrance with covered stoop, a double glass door that opens onto the sitting porch
- Mudroom entrance space provides an organized portal in and out of your home
- Storage closets and built in shelving
- Loft with sleeping space, optional home working space, and under-eave storage space
The cost of the blossoming, climate responsive Flora 900 does not include site & utility construction expenses, as requirements vary by site location. Give us a call or an email to discuss your particular situation further and we are happy to help with an estimate.
Click to view the BEAM model.

Click to see the overview flyer

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Casitas FAQ

GROUNDED ELEGANCE WITH LOFTY LIVING

Terra 600

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A detailed 3D rendering of the Terra, our 600SF, two story prefab home or ADU kit.

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A detailed 3D rendering of the exterior of the Terra, our 600SF, two story prefab home or ADU kit.

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First floor plan of the Terra, our 600 SF, two story prefab home or ADU kit. ,

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2nd story floor plan of the loft in the Terra, our 600SF, two story prefab home or ADU kit.

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A 3D rendering of the living room in the Terra, our 600SF, two story prefab home or ADU kit.

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A 3D rendering of the living room and hallway in the Terra, our 600SF, two story prefab home or ADU kit.

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A 3D rendering of the living room and kitchen in the Terra, our 600SF two story prefab home or ADU kit.

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A 3D rendering of the loft in the Terra, our 600SF two story prefab home or ADU kit.

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A 3D rendering of the storage loft in the Terra, our 600SF, two story prefab home or ADU kit.

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A 3D rendering of the mudroom in the Terra, our 600SF, two story prefab home or ADU kit.

Our elevated Terra 600 offers 580 square feet of conditioned living space, featuring a loft, a fully designed kitchen and bath, and advanced mechanicals, electrical, and plumbing.

In addition to the features included in all Casitas, Terra 600 uniquely features:
- 580 square feet of interior living space
- Full kitchen
- Swing door for bathroom for increased privacy
- Open-concept dining-living area
- Full L-shaped stairs with landing
- Under-stair built in shelving for integrated storage
- 2 entrances: one single door entrance with covered stoop, a double glass door that opens onto the sitting porch
- Mudroom entrance space provides an organized portal in and out of your home
- Storage closets and built in shelving
- Loft with sleeping space, optional home working space, and under-eave storage space
The cost of the earthy, climate responsive Terra 600 does not include site & utility construction expenses, as requirements vary by site location. Give us a call or an email to discuss your particular situation further and we are happy to help with an estimate.
Click to view the BEAM model.

Click to see the overview flyer

Request a Casita Quote

Casitas FAQ

Tour the Terra 600, virtually, below:

SINGLE FLOOR SERENITY

Agua 400

Step into luxury with the Agua 400. Revel in 400 square feet of conditioned living space, boasting a fully designed kitchen, complete bathroom, and top-tier mechanical, electrical, and plumbing features.

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Exterior 3D rendering of the Agua, our 400SF prefab ADU kit.

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A detailed 3D rendering of the bedroom inside the Agua, our 400SF prefab ADU kit.

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A detailed floor plan of the Agua, our 400SF prefab ADU kit.

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A detailed building section of the Agua, our 400SF prefab ADU kit.

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3D rendering of the living room in the Agua, our 400 SF prefab ADU kit.

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A detailed 3D rendering of the Agua, our 400SF prefab ADU kit.

Experience the convenience of universal design and one-floor living, all on a low-carbon concrete slab foundation or pier foundation with ramp for barrier-free entrance. Enjoy sustainable luxury with our base model.

In addition to the features included in all Casitas, Agua 400 uniquely features:
- 400 square feet of interior living space, plus covered porch
- Storage closets
- Swing door for bathroom for increased privacy
- Full ADA-compliant design for aging in place and all abilities
  - Barrier-free entrance
  - Roll-in shower and full turn-arounds in bathroom
  - Counter, sink heights, and kitchen design set for wheelchair-user and following principles of universal design
The cost of the accessible, climate responsive Agua 400 does not include site & utility construction expenses, as requirements vary by site location. Give us a call or an email to discuss your particular situation further and we are happy to help with an estimate.
Click to view the BEAM model.

Click to see overview flyer.

Request a Casita Quote

Casitas FAQ

PETITE PERFECTION

Cabañita 300

Meet the Cabañita 300, where miniature elegance blossoms in 314 square feet of contemporary living space. Upgrade to the Cabañita Plus to include a bathroom.

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3D rendering of the Cabañita Casita, our 300SF two story prefab ADU kit.

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First floor plan of the Cabañita, our 300 SF, two story prefab home or ADU kit.

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A detailed floor plan of the Cabañita+, our 300 SF, two story prefab home or ADU kit.

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Interior loft floor plan of the Cabañita, our 300 SF, two story prefab home or ADU kit.

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Interior first floor of the Cabañita, our 300 SF, two story prefab home or ADU kit.

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3D rendering of the Cabañita, our 300 SF, two story prefab home or ADU kit.

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3D rendering of the interior first floor of the Cabañita, our 300 SF, two story prefab home or ADU kit.

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3D Rendering of the Cabañita+, our 300 SF, two story prefab home or ADU kit.

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3D rendering of the Cabanita+, our 300 SF, two story prefab home or ADU kit.

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3D rendering of the Cabañita, our 300 SF, two story prefab home or ADU kit.

In addition to the features included in all Casitas, Cabañita 300 uniquely features:
- 314 square feet of interior living space, plus covered porch
- Alternating tread stair (code compliant)
- Pocket door for bathroom for space-saving, functional ease
The cost of the simplistically climate responsive Cabañita 300 does not include site & utility construction expenses, as requirements vary by site location. Give us a call or an email to discuss your particular situation further and we are happy to help with an estimate.
Click to view the BEAM model.

Click to see overview flyer for 300

Click to see overview flyer for 300+

Request a Casita Quote

Casitas FAQ

Step into a Casita and feel what it means to be held by a home.

Throughout the year, we host tours of our local Casita models at various stages in the construction process so you can explore the thoughtful details, the variety of models and designs, and imagine what's possible when homes are built with care, intention, and love for this earth.

Tour a Casita

Why Casitas?

Our mission with the Casitas is to help bridge the gap in accessible, sustainable housing by bringing thoughtfully designed homes and ADUs to the missing middle—those too often left out of high-performance building conversations. Every Casita is crafted to be healthy and non-toxic, fully electric for a fossil-fuel-free future, and made with carbon-storing materials that actively support climate resilience. We're building for the folks who want their homes to reflect care for their bodies, their communities, and the planet.

Casitas FAQ

Two packages for Casita Kits:

Our starting prices for Casita kits range from $58,900 - $152,500, with options for additional or alternative selections at extra cost.
Shipping costs can be estimated by requesting a Casita quote.
We can ship our Casita (prefab small home and ADU) kits anywhere in continental North America.
With a Casita Kit, you’re purchasing a ready-to-assemble high performance building enclosure.
See more details in What’s included in a Casita Kit.

Kit-Only

Photo of the Cabañita 300 prefab adu kit being installed in Burlington, VT

Our pricing for kit installation is $15-$24/SF.
Installation and shipping costs vary by site. Please request a Casita quote for more information.
Generally we can install Casita kits anywhere within 2 hours of any of our Seed Collaborator offices in Essex Junction, Vermont; Easthampton, MA; Baltimore, MD; Columbia, MO; Arvada, CO; and Bellingham, WA, with more offices coming online in 2026.
Beyond What’s Included in a Casita Kit, the installation package includes assembly of the building enclosure, complete with a layer of Solitex Adhero (Weather Resistant Barrier).