An ADU project in Longmont typically takes 3–6 months from signed contract to move-in. Here's how the timeline breaks down and what happens at each stage.
This is the "kitchen table" phase. No commitment until you sign.
Longmont's ADU permit process is well-established. Pre-approved plan elements help. Typical review is 4–6 weeks; 8 weeks is conservative.
Panelized construction significantly compresses the framing phase. You get weekly photo updates throughout.
Longmont has one of the most straightforward ADU ordinances on the Front Range. Here's what makes it work:
longmont.detail.1.desc
longmont.detail.2.desc
longmont.detail.3.desc
longmont.detail.4.desc
longmont.detail.5.desc
longmont.detail.6.desc
The property finder shows your lot, setbacks, and which plans fit — in 30 seconds.
Keep exploring
ADU rules by city
Cited, city-by-city ADU rules across the Front Range.
Rental income potential
Real numbers on what ADUs earn.
ADUs for family
Aging parents, multigenerational living, childcare.
How to finance an ADU
HELOC, construction loans, and CHFA options.
Floor plans & pricing
Three sizes, three tiers, two styles.
About Addwell
Who we are and how we build.