The Sierra

100 sqft of Modern Cottage with Classic Charm

Choose Your Package:

Steel Frame Package

DIY-friendly structural kit

Actual Structural Engineered Stamped Plans to Turn into Building Dept. (Not just shop drawings)
Complete Steel Frame Kit with OSB Attached Already and Holddowns
Just Erect and Bolt Together
Trusses and Roof Included

Turnkey Delivery

Complete move-in ready home

Everything in Steel Frame Package
Complete Home Kit Ready To Move In!
Just Erect and Bolt Together, Slide in Doors and Windows, Add Siding, etc.

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Product Description

The Sierra is a compact architectural gem that delivers full cottage charm in just 100 square feet. This modern cottage/contemporary farmhouse hybrid features a steep symmetrical gable, white board-and-batten siding, and black metal accents that create an iconic profile perfect for any backyard. With its 58-square-foot covered entry terrace and French door connection, The Sierra transforms a minimal footprint into a welcoming guest suite, home office, or personal retreat that feels larger than its size suggests.

Modern cottage charm - Contemporary farmhouse style
100 sq ft efficiency - Maximum use of minimal space
French door entry - Abundant natural light
Covered terrace - 58% additional living space
Iconic profile - Instagram-worthy design

Specifications

Size Details

100 sq. ft. interior space
Living room: 85.53 sq. ft.
Bathroom: 14.44 sq. ft.
Covered entry terrace: 58 sq. ft.
Total experience: 158 sq. ft.

Design Features

Steep symmetrical front-facing gable for cottage appeal
White board-and-batten vertical siding
Black standing seam metal roofing
Black-framed divided-light French doorsdining terrace
Centered entry with balanced façade
Small gable vent/window for vertical emphasis
Wall-mounted sconces flanking entry• Compact kitchenette or wash area option

What's Included in Steel Frame Package

Precision-engineered 2x6 cold-formed steel framing for walls, roof, and floor system
Pre-cut, pre-drilled members for simplified on-site assembly
Structural system engineered for long-term durability and performance
OSB sheathing pre-attached for rigidity and easier finishing
Engineered drawings included, stamped and tailored to your specific building jurisdiction requirements

Turnkey Inclusions

Full steel frame with weatherproof exterior envelope and premium siding options (stone, wood, or cement fiberboard)
Roofing system with underlayment and standing seam metal or flat membrane roofing
Energy-efficient double-pane windows and designer entry doors
Complete insulation package (R-28 or better)
Interior finishes: drywall, paint, flooring, and trim
Micro kitchen with cabinetry, countertops, sink, faucet, and appliance-ready hookups
Micro bathroom with vanity, toilet, and fixtures
Complete MEP systems: plumbing, electrical, HVAC, and water heater
Outdoor amenities integration: decking, exterior lighting, and architectural detailing for seamless luxury living

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Proof In Practice

Owners who stopped compromising.

We needed extra space for our growing family and a quiet area for remote work. TruHaven ADU provided us with a beautiful, functional addition that perfectly meets both our needs. It’s been a game-changer for our household!

John Clark TruHaven Owner

Adding a TruHaven ADU to our property was one of the best investments we’ve made. It not only provides us with extra living space but also increased our home’s value. Knowing that it offers flexibility for our future plans gives us great peace of mind.

Elizabeth Johnson TruHaven Owner

We were looking for a durable and low-maintenance solution for our backyard. TruHaven ADU exceeded our expectations with its sturdy construction and minimal upkeep. It’s reassuring to know that our new space will last for many years without any issues.

Michael Wim TruHaven Owner