Longmont, Colorado · Garage Conversions
Garage Conversion Contractor in Longmont, CO
Turn your garage into a bedroom, home office, gym, studio or in-law suite. We handle the permit, insulation, heating, windows and finish work under one contract.
What a Garage Conversion Includes
- Framing in the garage door opening with a wall, window or door
- Insulating walls and ceiling to living-space standards
- Raising or leveling the floor over the slab, with a moisture barrier
- Heating and cooling, often a ductless mini-split
- Electrical, outlets and lighting for a living space
- Egress window if the room will be a bedroom
- Drywall, flooring, trim and paint
- Optional bathroom or kitchenette
Permits and Zoning
Converting a garage to living space changes how the space is used, so it needs a building permit from the City of Longmont, or your city or county. Some neighborhoods and HOAs also have off-street parking rules. We check the zoning and permit requirements before you commit.
How Much Does a Garage Conversion Cost?
Cost depends on the garage size, whether you add a bathroom or kitchenette, the floor work and the heating system. A simple office or bedroom costs much less than a full in-law suite with plumbing. We give a free, itemized written estimate after we see the space.
Garage Conversion vs. ADU
A garage conversion keeps the space attached to your home. A detached garage apartment or ADU is a separate unit with its own rules. Read what is allowed for ADUs and garage apartments in Longmont.
Why Longmont Homeowners Hire Us
- Licensed general contractor: Boulder County CON-24-0152 (Class C), Jefferson County Class C, Douglas County Class A
- In business since 2014; Josh has worked in construction since 1996
- One contract covers every trade, so there is no juggling separate subs
- Free, itemized written estimates before any work starts
- Senior and veteran discounts on every project
Need more room another way? See second story addition cost or our home additions page.
Frequently Asked Questions
Do I need a permit to convert my garage in Longmont?
Yes. Converting a garage into living space needs a building permit. Josh Brooks Construction checks zoning and pulls the permit.
Can a converted garage be a legal bedroom?
Yes, if it meets code for a bedroom, including an egress window, insulation, heat and proper ceiling height.
How do you heat a converted garage?
Many garage conversions use a ductless mini-split for heating and cooling. We size it for the space.
Get a Free Written Estimate in Longmont
Josh Brooks Construction and Renovation Inc. has been in business since 2014, and Josh has worked in construction since 1996. One licensed contractor, one contract, and the owner accountable for the job. Senior and veteran discounts on every project (details).
Call 720-828-7997 or text 720-453-5095.


