Building Home Additions & ADUs Across Lakewood, CO

Home Additions & ADU Builders in Lakewood, CO

Your home works — it just doesn’t have enough of it. Maybe you need a second bedroom, a proper home office, or a separate living space for a parent who shouldn’t be across town. Whatever’s driving the need, an addition or ADU is the fix that doesn’t ask you to move.

We build home additions and accessory dwelling units across Lakewood, Golden, and the surrounding West Denver metro. Every project is designed to match your existing roofline, siding, and foundation style — so the new space looks like it was always part of the house. We handle permitting, structural engineering coordination, and every trade from foundation to finish.

Additions & ADUs Built Around How You'll Actually Use the Space

Not every project needs the same thing. A second-story addition for a growing family is a completely different build than a detached ADU meant to generate rental income. We scope each project based on what you’re solving for, not a template. We staff every project with a licensed electrician and plumber instead of one person covering all three trades. See how we staff every project on our services page.

Room Additions — Extra bedrooms, expanded living areas, or a new primary suite added onto your home’s existing footprint. We tie into your current foundation and roofline so the addition reads as original construction, not an afterthought.

Second-Story Additions — When your lot doesn’t allow you to build out, we build up. Second-story additions require structural assessment of your existing foundation and framing — we handle that evaluation before design begins.

Attached ADUs — A self-contained unit connected to your main house with its own entrance, kitchen, and bathroom. Common for aging parents or adult children who want independence without full separation.

Detached ADUs — A standalone structure on your property — essentially a small home. These are the most common choice for homeowners looking at rental income or a fully private guest space. Recent Colorado legislation has made ADU permitting more accessible, and we’ll confirm exactly what’s allowed on your lot before anything gets designed.

How Your Addition or ADU Gets Built

We design every addition or ADU to match your home’s existing roofline and siding — not a boxy add-on that looks bolted to the side of the house. From there: design, permitting, framing, then finish work, in that order, so you always know what stage you’re in.

Design

We map out your floor plan, material selections, and structural tie-ins based on your existing home. Everything is scoped and agreed upon before a single permit gets pulled.

Permitting

We manage the full permitting process through Jefferson County and your local municipality — zoning clearance, structural plans, utility connections. You don't deal with the city.

Framing

Foundation and framing go up to match your home's existing structure. This is where the addition or ADU takes physical shape and you can walk the actual space.

Finish Work

Electrical, plumbing, drywall, flooring, paint, and fixtures — all coordinated under one point of contact through final walkthrough and handoff.

Frequently Asked Questions

What's the difference between a home addition and an ADU?

A home addition adds space onto your existing house, think an extra bedroom or a second story. An ADU (accessory dwelling unit) is a separate, self-contained living space on your property, attached or standalone, with its own kitchen and bathroom. Which one makes sense depends on what you’re trying to solve for.

Recent Colorado legislation has made it easier for homeowners to add ADUs, but the specific rules still vary by city and county. We’ll walk through what’s allowed on your property before we design anything, so you’re not guessing.

Both are common reasons homeowners build one. Some clients want a place for parents or adult children close by, others want the rental income. We design the space around how you actually plan to use it.

Additions typically run 2 to 4 months depending on size and scope. ADUs, especially standalone units, can take 4 to 8 months once permitting is complete. We’ll give you a firm timeline for your specific project and city during the consultation.

Size, foundation work, and whether you need new utility connections are the biggest factors. Permitting requirements can also add cost depending on your city. We’ll break down what applies to your specific project during the consultation.

Ready to Add Space Without Moving?

Tell us what you’re working with — your lot, your house, and what you need the new space to do. We’ll tell you what’s buildable, what it’ll take, and what it’ll cost. No pressure, no obligation.