Attic Remodeling costs
Compare the project, repair and planning references below before choosing the work for your property. Confirm measurements, existing conditions and the services included in each proposal.
Cost scope: Benchmarks were reviewed October 24, 2026. Figures apply to the scope and market named by each reference. City/state examples outside Portland Metro are not Portland quotes. Labor, equipment, recurring expenses and complete projects are different budgets.
Installation and project costs
Compare alternatives separately. A range includes installation only when its scope says so. Do not add overlapping totals together.
| Project or reference | Published benchmark | Basis and scope |
|---|---|---|
| Cost to add a dormer | $90 – $150 | per sq ft installed |
| Cost to add a dormer | $3,000 – $25,000 | total to install |
| Loft conversion cost | $150 – $350+ | per sq ft |
| Loft conversion cost | $45,000 – $105,000+ | total conversion (300 sq ft) |
| Cost to finish an attic | $50 – $150 | per sq ft |
| Cost to finish an attic | $15,000 – $75,000 | total to finish |
Related RemodelRates cost guides
Explore the related RemodelRates guides for project benchmarks and planning details.
Before requesting bids
Share measurements, photos, location, existing conditions and the desired result. Ask for a written scope covering preparation, permits, removal, material specifications, installation, disposal and finish repairs where relevant. Compare bids using the same quantities and exclusions.
Material cost
No separate material-only purchase range was verified for this collection. Ask for an itemized allowance with quantities, product specifications and delivery; do not infer it by subtracting unrelated ranges.