Boulder County, Colorado Boulder & Longmont

Barndominium Builders in Boulder, Colorado

Inside Boulder's city limits a barndominium is an unusual project, and we would rather say so up front. Lots are small and expensive, the city caps building coverage and floor area, and its own energy code goes well beyond the model code most Colorado jurisdictions start from. What does work here is a compact shop-style home: a steel or timber frame with a tall garage bay, metal cladding and an all-electric mechanical plan, drawn to fit the lot's zoning numbers from day one. We plan and build those, and we tell owners early when the parcel they have in mind is better suited to a conventional frame. Many of the enquiries we get from the city end in a search for land outside it, and we help with that too. Permits for any lot within the city come from the City of Boulder's Planning & Development Services, not from Boulder County, so the drawings answer to city code and city review. To see whether your lot can take it, start the survey with the address.

Boulder at a glance

Principal county: Boulder County
Building permit: City or town building department
Local facts on this page: 5, each linked to its source

Tell us about your land

Before you build in Boulder

The local answers that shape a build here, each taken from the office or document that publishes it. Rules change, so we confirm them again against your parcel before drawing.

City or town permitWho issues the permit

City of Boulder Planning & Development Services

The City of Boulder issues building permits for new single-family homes and accessory buildings inside city limits. A new structure needs a scope of work form, a lot area declaration and a zoning data worksheet covering building coverage and floor area ratio. Unincorporated land outside the city answers to Boulder County instead.

Source: Residential Building Permit Guide | City of Boulder (bouldercolorado.gov)

Building code in force: City Council adopted the 2024 International Code Council codes with local amendments on 20 March 2025, effective 1 August 2025; the amendments sit in Title 10 of the Boulder Revised Code. The 2024 City of Boulder Energy Conservation Code took effect 1 December 2024.
New homes must be all-electric: The city's energy code FAQ states there are no exceptions for residential projects or additions: they must be all-electric. Homes of 3,000 square feet and larger must be net-zero energy, and smaller homes must reach an Energy Rating Index of no more than 30 with renewables.
Wildland-urban interface code: Boulder first adopted the International Wildland Urban Interface Code in 2014 and has adopted the 2024 edition with local amendments, applying to building permits in the mapped WUI area from 1 August 2025. It sets three classes of ignition-resistant construction by fire hazard severity, and new fence sections within 8 feet of a structure must be noncombustible.
Lot coverage and floor area: New structures require a zoning data worksheet checked against the Boulder Revised Code's maximum building coverage (section 9-7-11) and floor area ratio (section 9-8-2) rules, plus a stormwater and flood management fee form when hard-surface area changes.
Deconstruction on scrape-and-rebuild lots: Under the 2024 city energy code, full demolition and deconstruction projects must show how 75% of the project's waste by weight will be diverted from landfill through reuse, donation or recycling, backed by a refundable deposit.

Building on land near Boulder

Open acreage near Boulder is rare: the city is ringed by open space, and the unincorporated land that does sell carries Boulder County's own review. A city lot that already has a house usually means a scrape and rebuild, with the deconstruction rules that come with it. Owners who want several acres and a real shop generally look further out, to [Boulder County](/areas/boulder-county-co/) parcels on the plains or across the line into [Weld County](/areas/weld-county-co/), where land prices ease. Wherever you land, our [site preparation](/services/site-preparation/) work sorts out the pad, drive and utilities first.

Where we build in this part of Colorado

Boulder & Longmont

What we build in Boulder

Kits, custom plans and turnkey builds. The parcel decides the budget more than the floor area does, so we price against your land rather than a rate card.

Custom Plans

Custom barndominium plans for Colorado: floor plans drawn around your land, snow load and soils, ready for a licensed engineer's seal where required.

Barndominium Kits

Barndominium kits for Colorado land: steel or pole barn shell packages drawn to the snow load your own county or city sets for your elevation.

Turnkey Builds

Turnkey barndominium builds in Colorado: one team from land and permits through well, septic, shell and finishes to a house you move into.

See every service

Have land in or near Boulder? Tell us about the parcel and what you want to build, and we will check it against the local rules before anything is drawn.

Start your build survey

Building in Boulder: questions

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How much does it cost to build a barndominium in Boulder?

Inside the city, the land and the code weigh more than the frame: all-electric equipment, the energy-rating target with renewables, WUI construction on some lots, and deconstruction if an old house comes down. We price against the actual lot and design, not a rate card. The barndominium cost guide covers sourced ranges and the drivers, and the survey tells us enough to start.

Do I need a building permit for a barndominium in Boulder?

Yes. Inside city limits the City of Boulder's Planning & Development Services reviews and permits the home under the 2024 codes and the city's energy code, with zoning checks on coverage and floor area. If the land is outside the city, the county issues the permit under a different code. Our permitting service prepares the city submittal.

Can post frame homes or steel homes meet Boulder's energy code?

Yes, if the envelope and mechanical plan are designed for it from the start. Post frame homes take thick insulated walls well, and steel homes need careful thermal breaks at the frame. Either way the heating, hot water and cooking must be electric, and a rooftop solar array is usually part of reaching the city's rating target. See post frame homes for our approach.

Are barndominium kits allowed in the City of Boulder?

The city reviews the building, not the source of its parts, so barndominium kits are workable when the package is drawn to the 2024 codes, the WUI class for the lot and the city's energy rules. Most off-the-shelf kits need changes before they get there. Whether you buy from us or from other barndominium contractors, have the package checked on those terms before anything is ordered; metal building homes shipped for a warmer market often need a new insulation plan.

Keep reading

What usually comes next once you know what Boulder allows.

Barndominium Cost Guide

Sourced per-square-foot ranges by tier and size, and what moves the number on your land.

Read it

Is a Barndominium Legal in Colorado?

Zoning, septic and who inspects, before you buy the land.

Read it

How Long Does It Take?

From parcel to move-in, and which steps set the clock.

Read it

Sources for this page

The published pages behind the Boulder facts above. Rules change, so check the current version with the office before you rely on it.

Barndominium builders near Boulder

Nearby places we also build in. Across a city limit or a county line the permit office, zoning and septic rules can change, so each has its own page.

Boulder County

Colorado county

Longmont

Boulder and Weld Counties, Colorado

Jefferson County

Colorado county

Building in Boulder?

Start with the survey. Tell us where the land is and what you want on it, and we will come back with which office permits it, what it will allow, and a plan to fit.

Start the survey