Cost $170,000Adds $59,500
Your estimate
Cost
$64,000
Adds at resale
$33,920
Recouped
53%
National planning figure: $64,000 cost, 53% recouped. Ranked #20 of 27 projects by ROI.
A bathroom addition builds a new full bath, either by bumping out the house or carving space from an existing room. It includes plumbing runs, a tub or shower, toilet, vanity, tile and ventilation.
Why it scores where it does
- Bathroom count is a filter on listing sites: a second bath can put a house in front of more buyers.
- New plumbing runs and possible foundation work are costly.
- Converting existing space is far cheaper than a bump-out.
Get the most from it
- Look for space near existing stacks (a closet or under-stair area) to keep plumbing short.
- A half bath adds convenience for much less than a full bath.
- Permits and inspections are essential for plumbing work.
Bathroom addition ROI by region
| Region | Cost | Value added | % recouped | Level |
|---|---|---|---|---|
| Pacific | $76,800 | $43,418 | 57% | |
| Mountain | $64,000 | $35,955 | 56% | |
| South Atlantic | $60,800 | $32,563 | 54% | |
| New England | $71,680 | $37,312 | 52% | |
| West South Central | $58,880 | $29,510 | 50% | |
| East South Central | $57,600 | $28,493 | 49% | |
| Middle Atlantic | $70,400 | $34,598 | 49% | |
| West North Central | $62,720 | $29,850 | 48% | |
| East North Central | $63,360 | $29,171 | 46% |
Frequently asked questions
How much value does adding a bathroom add?
On average around half the cost is recovered, but going from one bathroom to two in a three-bedroom house can have an outsized effect because many buyers filter out one-bath homes.
Is a half bath worth adding?
Often yes. A powder room costs a fraction of a full bath and solves the "one toilet for the whole family" objection.