Just moved into a home with a brand-new, wide-open basement that is nothing but concrete and studs? Wondering what new basement construction actually involves once the foundation is already poured?
Not sure what has to happen before that bare space becomes a real room?
In this basement finishing guide, you’ll learn how we turn a new, unfinished basement into a finished living space, from moisture and framing to insulation, codes, and the order in which the work happens, across the Denver Metro Area.
One thing up front: we don’t pour foundations or build the shell, we build the finished basement inside it.
What New Basement Construction Really Means
For a homeowner, new basement construction usually means building out an unfinished or brand-new basement into a finished living space within the foundation that already exists.
That means handling moisture and waterproofing first, then framing, insulation, drywall, and finishes, usually over about 6 to 10 weeks across the Denver Metro Area.
At Elevation Basements, we finish the basement but do not pour the footings, foundation walls, or slab, since they are already in place when we start.
Ways to Use Your New Basement
Once the new basement is finished, it can become almost anything.
- Media rooms and home theaters.
- Home gyms and home offices.
- A guest suite or an extra bedroom.
- Wet bars, wine rooms, and luxury bathrooms.
- Hidden rooms, steam rooms, and golf simulators.
A finished basement also turns unused square footage into real living space and can add to your home’s resale value.
The Shell You Start With
A new, unfinished basement begins as a structural shell that the home builder has already finished.
The concrete foundation walls, exterior walls, slab floor, and footings are all in place before we arrive.
Our job is everything that turns that shell into a room, so we plan the new space around the existing concrete walls and any windows or utilities already there.
Moisture, Drainage, and Waterproofing Come First
Before any framing goes up, we make sure the new basement stays dry.
Here in Denver, we plan around expansive clay soils and groundwater that can push moisture through concrete walls.
We treat waterproofing as a required first step, including soil grading away from the foundation, sealed walls and floors, drainage improvements, and a sump pump to prevent water intrusion and slab cracking.
We also account for radon as part of that groundwork.
Framing, Insulation, and the Vapor Barrier
Once the space is dry, we frame the new walls and get them ready for insulation and drywall.
We build stud walls just inside the concrete, insulate them to keep the basement warm through Denver winters, and add a vapor barrier to limit mold growth.
We can also soundproof the space if you want the basement to stay quiet from the rest of the house.
The exact insulation, R-value, and vapor barrier approach follows the energy codes that apply to your project.
Permits, Building Codes, and Egress
A new finished basement has to be code-compliant, and we handle the permits and inspections for you.
Across the Denver Metro Area, from Littleton to Parker, Castle Pines, and Arvada, that covers egress windows, fireblocking, smoke detectors, and a minimum ceiling height for finished rooms.
Any new bedroom needs an egress window large enough to climb out of in an emergency.
The Order the Work Happens
New basement construction follows a set order, so nothing has to be redone, and it follows the same turnkey process we use for every basement.
- Handle the moisture work, then frame the walls and rough in the plumbing, electrical, and mechanical systems.
- Add insulation, the vapor barrier, and drywall, then pass the rough-in inspections.
- Install the flooring and finish the ceiling.
- Paint, then set cabinets, doors, and the finishing touches.
- Pass the final inspection and walk the finished, code-compliant basement together.
We also built in a 10 to 15 percent contingency for any surprises behind the walls.
What a New Finished Basement Costs
We don’t price a new finished basement off a national average.
We design before we price, so the number fits your space, your finishes, and your home’s condition.
| Basement size | Starting rate |
|---|---|
| ~500 sq ft | ~$74 per sq ft |
| ~1,000 sq ft | ~$57 per sq ft |
| ~1,500 to 2,500 sq ft | $48 to $50 per sq ft |
What you add to the basement, and the materials you choose, move the price the most.
| Upgrade | Typical cost |
|---|---|
| Extra bedroom or office | ~$5,000 |
| Half to full bathroom | $8,000 to $19,000 |
| Wet bar, small to large | $5,000 to $25,000 |
| Egress window | $2,600 to $5,600 |
If the full build exceeds the budget right now, we can phase it, and we have helped homeowners stay under budget by starting with framing and flooring.
Why Denver Homeowners Choose Us to Finish the Build
We don’t pour foundations, and we don’t pretend to.
We finish basements, and we were founded in 2021 by Ed and Evan Clark, who managed new home construction for a national homebuilder before starting the company.
One team handles the build from the first floor plan to the final coat of paint, with a free design phase, pre-construction meetings, and a BuilderTrend project portal that keeps your schedule and budget in one place.
You also get more than 35 five-star reviews and a one-year warranty, and you can see how we compare to other Denver basement finishing companies from Centennial to the historic homes of Denver.
The Shell Is Done. The Fun Part Starts With Elevation Basements
We take a new, unfinished basement and build it into a finished living space, handling moisture work, framing, insulation, permits, and finishes as one turnkey team across the Denver Metro Area.
We don’t pour the foundation, but everything that turns that concrete shell into a room is ours to manage.
Fill out our contact form or give us a call to start a free design phase. We will visit your new basement, draw a floor plan in about two days, and map the build around the foundation you already have.
