Answer 6 questions about your crawlspace for a Portland 2026 price estimate. Free, instant, and no email required.
Answer 6 quick questions for a modelled 2026 Portland-area price range. How these figures are produced.
This estimate is based on Portland metro 2026 pricing for projects of this size and scope. Actual costs vary by specific conditions and contractor. Get a free in-person inspection to confirm.
The whole method fits in one line: take the base range for the service you pick, multiply it by a size factor, add a flat amount for each of four conditions, and round both ends to the nearest $100. Nothing else happens, and it all happens in your browser.
Where the base ranges come from. They are modelled editorial estimates of the 2026 Portland metro market — not collected contractor quotes, and not an average of real bids. This site holds no database of Portland quotes. The calculator reads the same figures the cost guide publishes, and the cost methodology sets out how a range is built, what reference project it prices, and what it cannot do. Adjusting a modelled range returns a modelled range: a calculation performed on an estimate is still an estimate.
Why the reference project matters. Each base range prices one specific job: a 1,200 to 1,500 sq ft crawl space, damp but without standing water, with easy access and sound insulation, booked one to three months out. Those answers are the calculator’s neutral settings — marked below — and with all of them selected it returns the published range unchanged. Every other answer is measured from that job.
Crawl space sizeMultiplies the whole base range
Current conditionAdded to both ends
AccessAdded to both ends
Existing insulationAdded to both ends
TimelineAdded to both ends
“I don’t know” on size returns the reference size rather than a guess above or below it: if the size is unknown, the honest thing to quote is the job the published range describes. Dry and damp both add nothing because the ranges already price a damp crawl space and a dry one does not make the materials or labour cheaper.
Four sets of answers run through the same function the calculator above uses. Enter the same answers and you will get the same result.
Encapsulation · 1,000-1,500 sq ft · Damp, some moisture · Easy (full-height hatch) · Yes, in good condition · 1-3 months
$10,100 to $12,300
($10,100 to $12,325) ×1.00, rounded to the nearest $100
Every answer at the setting the published ranges describe. The calculator returns the published encapsulation range itself, rounded to the nearest $100 — a build-time check fails the release if it ever does not.
Vapor Barrier Only · Under 500 sq ft · Damp, some moisture · Very tight (under 18") · Yes, in good condition · Just planning ahead
$2,700 to $3,400
($3,225 to $4,425) ×0.58 + $850, rounded to the nearest $100
A small space scales the range down, but low clearance is a flat addition, so it takes a larger share of a small job.
Waterproofing · Over 1,500 sq ft · Standing water present · Tight (low clearance) · Yes, but wet or damaged · Within 2 weeks
$9,400 to $13,000
($3,825 to $6,800) ×1.23 + $4,670, rounded to the nearest $100
Size, standing water, wet insulation and a two-week start all stack. This is how an estimate lands well above the typical band without anything being wrong with it.
Not Sure / Full Assessment · 1,000-1,500 sq ft · Damp, some moisture · Easy (full-height hatch) · Yes, in good condition · 1-3 months
$4,300 to $12,800
($4,250 to $12,750) ×1.00, rounded to the nearest $100
With no service chosen, the calculator uses a deliberately wide band for "some combination of work". It is the least informative answer the tool gives, and the strongest argument for an inspection.
For comparison, the published typical range for encapsulation is $10,100 to $12,325. For what several wet crawl space scopes cost together, and the same size-by-condition arithmetic laid out as a table, see wet crawl space repair costs in the cost guide.
An estimate built from six questions is a planning number, not a quote. It is blind to the things that most often move a real Portland bid, including rotted joists or beams that need structural repair, a foundation crack that needs injection, a discharge line that has to run a long way downhill to daylight, an active rodent or pest problem, and asbestos or vermiculite in older insulation. Any of those can change the picture, which is why every contractor quote follows an in-person look at the actual space.
Treat the output as a budgeting range that tells you whether you are facing a four-figure or five-figure project. For the full price-by-service breakdown, what pushes each service to its high end, and how the ranges are produced, see the 2026 crawl space cost guide.
Request a free in-person inspection directly and a licensed contractor will assess your crawlspace.
