Published August 15, 2026
"Add a bedroom" covers four very different projects with very different price tags. Here is what each one actually costs in the Twin Cities in 2026, and how fast the money comes back.
The four ways to add a bedroom
| Approach | Typical cost | Timeline |
|---|---|---|
| Convert an existing room (dining room, den, oversized living room) | $3,500 – $9,000 | 3 – 7 days |
| Split one large room into two | $6,000 – $14,000 | 1 – 2 weeks |
| Finish a basement bedroom (with egress window) | $14,000 – $28,000 | 3 – 6 weeks |
| Convert a garage | $24,000 – $42,000 | 4 – 8 weeks |
| Build an addition | $150 – $300+ per sq ft | 3 – 6 months |
Conversions win on cost per bedroom almost every time. An addition is the only option that adds footprint, and it is 5 to 10 times the price.
Where the money goes on a typical conversion
Rough allocation on a $7,000 dining-room-to-bedroom job:
| Line item | Share |
|---|---|
| Framing, header, door opening | $900 – $1,600 |
| Drywall, tape, texture, paint | $1,200 – $2,200 |
| Door, trim, closet build | $800 – $1,800 |
| Electrical (light, outlets, interconnected alarms) | $700 – $1,600 |
| HVAC supply and return | $400 – $1,200 |
| Flooring | $500 – $2,000 |
| Permit and inspections | $150 – $600 |
Labor is roughly 55–65% of a conversion. Materials on a room this size are not the driver — the trades are.
What pushes the price up
- No egress: add $4,500 – $10,000 for a basement window and well
- Knob-and-tube or an undersized panel: electrical upgrades before you can add circuits
- Load-bearing walls: a beam and posts instead of a simple partition
- Asbestos or lead in an older Minneapolis or St. Paul house: abatement first
- Adding a bath with the bedroom: $12,000 – $25,000 more
The payback math
Take your project cost, divide by the added monthly rent. Ranges below are illustrative — check current listings in your own city before you commit.
| Project | Cost | Added rent/mo | Payback |
|---|---|---|---|
| Dining room conversion | $6,000 | $600 – $800 | 8 – 10 months |
| Basement bedroom w/ egress | $20,000 | $700 – $900 | 22 – 29 months |
| Garage conversion | $35,000 | $900 – $1,300 | 27 – 39 months |
Even the expensive version of this project pays back faster than almost any other remodel, because a bedroom is the unit both renters and buyers actually shop by. A 2-bed that becomes a 3-bed does not just get a nicer listing — it appears in an entirely different set of search results.
Get a real number
Ranges are for planning. We give free written quotes across the Twin Cities metro — tell us the room and we will price the actual work.
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