We convert and legalize basement spaces with practical planning for permits, egress, moisture considerations, and mechanical scope. This service is built for homeowners who need compliant living-space outcomes.
“Thomas and his team completely transformed our home. The craftsmanship is exceptional.”
Free consultation & estimate
Our Basement Conversion Approach
Basement conversions fail when egress, moisture, and mechanical requirements are treated as afterthoughts. We evaluate every below-grade condition before scope is set so permit, waterproofing, and ventilation details are resolved before framing starts.
You get a defined path from unfinished space to compliant habitable rooms with permits, inspections, and trade coordination handled on one timeline.
We evaluate existing basement conditions and define what is required for compliant habitable conversion.
Code, egress, and trade requirements are aligned before conversion work proceeds.
Work is delivered in phases that match permit and inspection milestones through turnover.
Portland Basement Conversions
N Portland
Basement-level rooms brought to code compliance with egress windows, updated finishes, and coordinated mechanical work.
Exterior & Egress
Exterior updates and egress window installation as part of full code-compliance renovation scope.
N Portland
Structural foundation work and garage relocation supporting below-grade space improvements tied to lot subdivision.
Our Guarantee
We stand behind our work. Every H&C project includes a written one-year workmanship warranty backed by our Oregon contractor bond and insurance.
Every joint, cut, and connection we make is backed for 12 months from substantial completion. If our work fails, we fix it at no cost to you.
You receive a signed warranty document at closeout. No verbal promises. No fine-print surprises. The scope is clear before you sign off.
Report a defect in writing or by email within 30 days of discovery. We schedule an inspection, confirm the issue, and handle the repair.
Project Financing
H&C Design-Build now offers financing options through U.S. Bank Avvance. If you are evaluating a remodel, you can review pre-approval options before final scope decisions are locked.
Financing is offered through U.S. Bank
Common Questions
Yes, if the space can meet Portland code for ceiling height (minimum 7 feet), egress, ventilation, moisture control, and fire separation. We evaluate these conditions before setting scope.
Every habitable basement bedroom needs an egress window or door. The opening must be at least 5.7 square feet with a maximum 44-inch sill height, and below-grade windows need a code-compliant well.
Permitting runs 4 to 8 weeks. Construction for a single-room conversion takes 4 to 8 weeks. Full basement finishing with bathroom addition and multiple rooms typically runs 8 to 14 weeks.
Finishing adds livable space. Legalization brings unpermitted or non-conforming work up to current code with proper permits, inspections, and documentation.
Basic finishing starts around $30,000 to $50,000. Full conversions with egress windows, bathroom additions, and mechanical upgrades typically run $50,000 to $100,000.
From Our Crew
Portland remodeling is what we do every day. These guides cover the real decisions homeowners face: permits, costs, materials, and trade coordination.
All guides
Portland basement finishing guide from a contractor. Realistic costs, permit requirements, moisture management, and code compliance for 2026.
Read guide
Portland permit requirements explained by a contractor. What work needs a permit, what is exempt, and why skipping permits costs more long-term.
Read guide