Not a contractor. Lead referral platform covering Portland's 10 deepest cost markets.
Almost universal on Hawthorne Craftsmans and foursquares. Per-sheet plywood overlay rate should be specified in contract before signing.
More accurate than national calculators because it routes your ZIP to the closest of 10 PDX cost markets and applies that market's specific cost drivers. Pre-1925 Hawthorne Craftsmans automatically include skip-sheathed deck overlay; West Hills addresses include steep-pitch labour premium and crane staging; historic district properties include design review fees. Range reflects typical 20% contractor variance on identical scope.
Pre-1970 Portland homes frequently have skip-sheathed decks (1×4 boards with gaps) that require full plywood overlay before modern shingles can be installed. 1980s-1990s homes have CDX plywood that delaminates under sustained moss in canopied neighborhoods. The age-based allowance reflects what a reputable Portland contractor would build into a quote pre-bid; ones that don't are setting up a change order.
Steep hillside lots in Council Crest, Forest Park, and West Hills frequently have driveway access on one side only, with upper-roof areas inaccessible from ground-level material staging. Crane day adds $1,400-$3,500 but is meaningfully cheaper than manually carrying material up steep slopes — and OSHA fall-protection requirements make manual staging legally questionable on 10:12+ pitches.
Properties in Pearl District (Central City review), Eastmoreland Historic District, Irvington Historic District, Ladd's Addition, or on Portland's Historic Resource Inventory require Type II Historic Resource Review before BDS issues a roofing permit. Review fees run $400-$700 depending on jurisdiction; the timeline adds 4-6 weeks for cedar in kind, 6-9 weeks for material substitution.
For typical scope on a kept-market property, yes — within ~20%. For unusual situations (major structural retrofit, flat-to-pitched conversion, premium custom materials), get actual contractor quotes. The calculator does not know about: existing structural deficiencies, asbestos remediation requirements on pre-1980 homes, HOA-mandated material restrictions, or solar panel removal/reinstall costs.
