Efficient. Durable. Affordable.

Next generation ADUs

Efficient. Durable. Affordable.

Next generation ADUs

Engineered.
Configurable.
Yours in months,
not years.

The Olerra Difference

*compared to typical site-built construction

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Affordable

Up to 30-50% less than site-built construction, avoiding high insurance premiums and operating costs.

Durable

Engineered steel frame built to last 3x longer than a typical 40-year, site-built home.

Energy Efficient

4" continuous closed-cell insulation with MGO board and Type X drywall throughout, for lower bills year-round.

Fire Resistant

The 100% steel frame with no structural wood won't fuel or accelerate a fire.

Storm Rated

Engineered for 165-180 mph winds and 90 lbs/ft² snow loads — far beyond standard residential code.

Earthquake Resistant

Built to California seismic standards, while most site-built homes have no seismic design at all.

Mold Resistant

Steel framing, MGO board, and fiber cement cladding won't rot, warp, or feed mold and pests like wood.

Move In Sooner

Ready in just 4-6 months instead of the typical 12-18.

Explore Models

490 — The Epitome of Versatility

Olerra 490 sq ft studio unit

Designed for efficiency, this space can serve multiple purposes: Whether you need a cozy guest house, a private home office, a rental unit for additional income, or a serene artist's retreat, this studio offers endless possibilities.

735 — Functionality and Luxury

Olerra 735 sq ft one or two bedroom unit

Spacious 1-bed and 2-bed layouts are perfect for luxurious living. With high-quality materials, state-of-the-art technology, and sustainable construction, our 735 sq ft unit is a smart, stylish, and substantial addition to any property.

Use Cases:

Top 5 Reasons People Choose Olerra's Modular Flex Flats

#1 They’re Affordable.

Olerra Flex-Flats offer savings of 40-50% over traditional builds and around 25% over prefab competitors, delivering cost-effectiveness without compromising on quality. 

#2 It’s Easy.

With Olerra, every step is handled under a single, fixed-cost contract. From design and permits to site work, manufacturing, and installation, Olerra seamlessly manages it all—making the process simple and stress-free for customers. 

#3 They’re Beautiful.

Olerra Flex-Flats enhance any backyard with sizes from 245 sq ft studios to 735 sq ft two-bedroom units. Optional features like rooftop patios, and pergolas allow for style customization. With Nichiha and Ceraclad fiber cement systems and a flexible frame, each Flex-Flat offers over 10,000 unique design possibilities, ensuring it’s beautifully tailored to your vision. 

#4 Flex Flats Are Better.

Built with steel-frame construction, Olerra Flex-Flats are exceptionally durable—resistant to 165 mph winds, rated for 1-hour fire resistance, and designed to support 105 lbs of snow and wind load. With spray foam insulation for energy efficiency, our steel frames offer a sturdier, longer-lasting structure than the wood frames used in traditional builds. 

#5 We’re FAST.

Olerra completes most projects in just 3-6 months—half the time of traditional or competitor builds. Flex-Flats are 90% factory-built in under a month and installed in a day using helical pile foundations. With only final touches like roofing and utility connections left for on-site, the process is smooth and minimizes disruption. 

The Olerra Process

We manage every detail from your first feasibility check to the final inspection — typically 20–24 weeks from start to finish.

01Property Check & QuoteStart here
  • On-site visit and feasibility study to confirm your lot.
  • AHJ requirements: zoning, setbacks, floodplain, and solar-shadow analysis.
  • Site plan, interior and exterior renders, and floorplans.
  • Estimated budget with financing options.
02Contract & Permitting8–12 weeks
  • Two contracts: a preliminary planning agreement, then a fixed-price build agreement.
  • ISP survey, soils report, and foundation design.
  • Architectural and structural engineering drawings.
  • Permit application and submission to your local authority.
  • Five-stage payment schedule, from deposit to final completion.
03Manufacturing6 weeks
  • Steel frame with mechanical, electrical, and plumbing.
  • Drywall, flooring, cabinetry, and fixtures — finished to 90%.
  • 200+ quality-control checks.
  • State-inspected for quality and code compliance.
04Site Work & Shipping6 weeks
  • Excavation, underground utilities, and foundation — run in parallel with the build.
  • Fully insured, monitored transport to your site.
05Installation & Completion4 weeks
  • One-day crane placement onto the foundation.
  • Matelines closed, roof set, utilities connected, and landscaping.
  • Final inspection and adjustments to Olerra's standards.

Built around the
way you live

One flexible steel frame, configured many
ways — from compact backyard studios to
garage units and multi-room suites.

Exposed steel frame structure of an Olerra 490 Flex-Flat
Modern Olerra ADU with an attached garage, shown at dusk

Garage Configurations

Combine finished living space with an integrated garage or workshop for storage, hobbies, or a home shop.

Interior of a compact Olerra studio fitted out as a home gym

Compact Studios

Smaller footprints sized for a home office, gym, or guest space without sacrificing comfort or daylight.

Bedroom interior of a two-bedroom Olerra Flex-Flat

Family Suites

One- and two-bedroom layouts that keep family close while preserving everyone's independence and privacy.

Exterior of an Olerra Flex-Flat in a landscaped backyard

Outdoor Living

Optional rooftop patios and pergolas extend the footprint into the backyard and shape the exterior.

What homeowners are saying

A few words from the people we've built backyard spaces for.

"Shockingly smooth. The Flex Flat arrived 90% done—all the finishes already in place. We watched them crane it into our backyard, and in five or six hours the whole structure was together. All in one day. Pretty amazing to see."
Chris J. Homeowner · Boulder, CO
"Olera turned our home into our dream home. We've got this amazing rooftop deck where we watch sunrises and sunsets—the kids even have breakfast up there. It fills a void we had before, giving us the space we always needed. ”
Tracy G. Homeowner · Boulder, CO
"We were a little worried about whether a new structure in the backyard would clash with our custom home—but the Olerra team helped tie everything together. It feels completely cohesive now, like it was always meant to be here.”
Jerard R. Rental owner · Boulder, CO

Frequently Asked Questions

A Flex-Flat is a modular, smart Accessory Dwelling Unit (ADU) designed by Olerra Living Innovations. It offers a technology-laden, energy-efficient, and luxurious living space that's quick to build and install — superior in construction, speed, and design compared to traditional ADUs.
Flex-Flats range from 245 sq ft studios to 735 sq ft one- and two-bedroom layouts. There is also a 490 sq ft studio.
Flex-Flats are priced competitively, costing 40–50% less than traditional site-built homes and 25% less than other prefab or modular competitors. Pricing is determined by the model, site preparation, and any additional customizations.
From contract signing to final installation, most Flex-Flats can be completed in 3–6 months — much faster than traditional builds. Manufacturing takes less than one month, and on-site installation is typically completed in one day.
Yes. Olerra offers architectural elements and customization options, including more than 10,000 design combinations utilizing premium materials like Nichiha and Ceraclad fiber cement systems.
The process begins with a free property check and quote. After signing a fixed-price contract, Olerra handles design, permit applications, manufacturing, site work, and installation.
Flex-Flats feature steel frame construction, providing 165 mph wind resistance, 1-hour fire resistance, and 105 lbs snow load capacity. Spray foam insulation ensures energy efficiency, and exterior finishes include Nichiha and Ceraclad fiber cement systems.
Yes. Flex-Flats are designed with sustainability in mind. They are energy-efficient, use eco-friendly materials, and are built with minimal waste.
Flex-Flats are built to last. They have steel frame construction, are resistant to fire and wind, and come with warranties: 10 years for the structure, 5 years for the building envelope, and 2 years for systems.
Yes. Flex-Flats are designed to comply with most local building codes. Olerra handles all permitting and ensures the unit meets local requirements.
Most Flex-Flats use helical piles for the foundation, which is quick to install and provides strong support for the unit. Site conditions will determine the best foundation type.
Olerra handles all site preparation, including soil reports, utility connections, and foundation work, as part of their comprehensive service.
On-site installation usually takes one day, with the unit arriving 90% complete from the factory. Final site work, including utility hookups and landscaping, typically takes 2–3 weeks.
Flex-Flats are transported fully built (or in sections, if larger) from Olerra's advanced manufacturing facility. Delivery and placement on-site are included in the installation process.
Yes. Many homeowners use Flex-Flats for generating rental income, either through long-term leases or short-term rentals like Airbnb. Flex-Flats offer privacy and safety, making them attractive rental units.
Yes. Flex-Flats increase property value by adding additional living space and potential income. They also improve the homeowner's quality of life.
Yes, permits are generally required — but Olerra takes care of the entire permitting process, ensuring compliance with local regulations.
Absolutely. Flex-Flats are perfect for expanding your living space with a home office, gym, yoga studio, or guest suite without the hassle of moving or undergoing a lengthy construction project.
Yes. Financing options are typically available through various lenders. Olerra can provide recommendations for financing based on your location and project.
Olerra offers several warranties, including a 10-year structural warranty, 5 years for the building envelope, 2 years for systems (HVAC, electrical, plumbing), and 1 year for materials and workmanship.
Yes, in most cases you can add a Flex-Flat to your property. However, you may need to check with your mortgage lender to ensure compliance with any terms related to property additions.
Yes. A Flex-Flat can typically be covered by your existing home insurance policy or added as a separate structure. Check with your insurance provider for specific coverage details.

Let’s build something you’ll love for decades.