Turn a basement into a real second living unit — separate entrance, kitchenette, bath, and egress — for rental income, an in-law suite, or multi-generational living.
An apartment or ADU is more than a finished basement — it's a self-contained home, which means a handful of specific pieces have to come together.
A basement apartment is one of the few renovations that can generate income — a legal rental unit in a high-demand area like Boulder is a genuine asset, not just nicer space.
It's also the most practical answer to multi-generational living: a private, self-contained suite for aging parents, an adult child, or long-term guests, with its own entrance and bath so everyone keeps their independence.
And it's flexible over time — rent it now, house family later, or use it as a guest suite in between. Few projects add this much optionality to a home.
Most projects combine a few of these into one cohesive lower level — our design-first process makes sure they work together.
Raw concrete and framing to complete, code-compliant living space — start to finish.
Learn moreReconfigure or modernize an existing finished basement into something better.
Learn moreCode-compliant egress windows for a safe, legal, light-filled basement bedroom.
Learn moreAdd a full or half bath downstairs, including the below-grade plumbing.
Learn moreMedia rooms, wet bars, and home gyms — wired, soundproofed, and laid out right.
Learn moreTell us how you want to use the space and we'll help you plan the right approach.
Call (720) 340-2032Boulder regulates ADUs closely. Whether you can add a basement apartment or accessory dwelling unit, and exactly what it must include, depends on Boulder's zoning and ADU regulations — which cover things like separate entrances, parking, size, owner-occupancy, and licensing. These rules change and vary by zone, so the right first step is confirming what's allowed for your specific property. We help you navigate that process and build to the standard a legal unit requires.
What it costs. A basement apartment or ADU is among the larger basement projects, because it combines a kitchen, a full bathroom, egress, a separate entrance, soundproofing, and code-driven systems. Cost varies widely with scope and site conditions, so we assess your specific basement and give you a clear, itemized estimate — and we're honest up front about what your property's zoning will and won't allow.
We see the actual space, talk through your goals, and measure. No pressure, no charge.
We turn the conversation into a real plan and a clear, line-by-line estimate.
We pull permits and build, managed start to finish by one accountable team.
We confirm every detail with you and hand over a space that's ready to use.
In many cases yes, but Boulder regulates accessory dwelling units closely — rules cover separate entrances, parking, size, owner-occupancy, and licensing, and they vary by zone and change over time. The right first step is confirming what's allowed for your specific property, which we help you do.
Generally yes. A legal dwelling unit typically needs its own code-compliant entrance, often through a walk-out or a new exterior access, plus egress for any bedroom. We design the entrance as part of the project.
Yes. We install a kitchenette or full kitchen — cabinetry, counter, sink, and appliances — with the plumbing and electrical handled, sized to what the unit and the rules call for.
A legal unit has to meet code and zoning: a compliant entrance, egress, a bathroom, often a kitchen, proper ventilation and detection, and the licensing your jurisdiction requires. We build to those standards and handle the permitting.
It's one of the larger basement projects, since it combines a kitchen, full bath, egress, a separate entrance, and code-driven systems. Cost varies widely with scope and site conditions, so we give you an itemized estimate after assessing your specific basement.
Often yes, if it's a legal, permitted unit and you meet Boulder's licensing and zoning requirements. Because those rules are specific and change, we help you understand what your property allows before you build.
Schedule a free, no-pressure in-home estimate. We'll measure your space and give you a clear, itemized quote.
(720) 340-2032Free, no-pressure in-home estimates across Boulder
