General contractor serving Boulder
We build decks, pergolas, basement finishes, additions and ADUs in Boulder and across Boulder County.
What we build in Boulder
Composite Decks
We design and build composite and wood decks across Loveland and Northern Colorado: new decks, full tear-out replacements, stairs, railing and covered sections.
See composite decks →Pergolas & Patio Covers
A pergola or solid patio cover turns a deck or patio into a space you can use on a July afternoon.
See pergolas & patio covers →ADUs
An accessory dwelling unit gives you a rental, a place for family, or a guest house on your own lot.
See ADUs →Home Additions
When you need more room but don't want to move, an addition is often the better deal.
See home additions →Basement Finishing
An unfinished basement is the cheapest square footage in your house.
See basement finishing →Fence Installation
We install residential and commercial fencing across Northern Colorado: wood, vinyl, privacy, composite and chain link.
See fence installation →Basement finishing and remodeling in Boulder
Many Boulder homes have an unfinished or dated basement, and it is usually the least expensive way to add a bedroom, bathroom or family room without changing your footprint. We handle the layout, permits, egress windows and every trade from framing to trim, and give you a fixed price before we start. See basement finishing or read our Northern Colorado basement cost guide.
Why Boulder homeowners hire JFI Builders
- Licensed general contractor, fully insured, building since 2006
- Fixed-price, line-item proposals, so the number doesn't move
- You deal with the owner and the same crew the whole way through
- BBB Accredited with an A+ rating
Recent projects
Permits and wildfire rules in Boulder County
Boulder County has wildfire building rules that affect deck materials and how they go together. We're licensed with the City of Boulder and Boulder County, and we check the requirements before we design your project.
What homeowners say
★★★★★Finished basement came out better than expected, and the price held even after we changed things.
Chantelle C. · Basement finish
★★★★★Handled the permits and drawings, tore out the old deck, and stuck with it until it was done.
Larry N. · Deck replacement
★★★★★A shower leak turned into nearly a full bathroom remodel. Fast, great crew, beautiful tile.
K. S. · Bathroom remodel
Get a fixed-price estimate
Tell us a little about the project. We reply within one business day, or call (970) 272-1187 Monday to Friday, 8 AM to 7 PM.
- Fixed-price, line-item proposal before any work starts
- Permits, drawings and inspections handled
- Licensed general contractor, fully insured, since 2006
- BBB Accredited, A+ rating
- Discounts for veterans & first responders
- Financing available