Is a crawl space inspection free?

The contractor visit this site arranges is free, because it is the first step of producing a bid rather than a service being sold. An Oregon certified home inspection, the whole-house kind ordered during a sale, is a paid service and the inspector sets the fee. No typical Portland-metro figure for that fee is published on this site, so none is quoted here; ask the inspector directly, and ask whether the crawl space is inside the base fee or priced separately.

What is the difference between a home inspection and a contractor inspection?

A home inspection establishes conditions and is deliberately not required to establish causes, methods, materials or costs. A contractor inspection exists to produce exactly those four things, because it ends in a bid. They answer different questions, and a homeowner who orders one expecting the other ends up frustrated with a report that was correct all along. See crawl space problems in a home inspection .

How do I check that the inspector or contractor is licensed?

Oregon construction work requires an active CCB licence; Washington work requires an active L&I licence, and the two do not transfer across the Columbia. Home inspectors in Oregon are certified by the CCB separately from contractor licensing. How to verify an Oregon contractor licence walks through the lookup and what to check on the record beyond "active".

Will an inspector go into a wet or very low crawl space?

Not always, and that is by the rules rather than by preference. Oregon home inspection standards require entry to the under-floor area except where access is obstructed or entry would be damaging or dangerous, and require the inspector to report the method used and any inaccessible areas. Wet crawl spaces are among the conditions the board itself lists as not inspected. If a report says the space could not be entered, that is information, not an omission.

The report says "moisture present". What do I do with that?

Treat it as an observation and nothing more. It has not established where the water comes from, whether it is seasonal or permanent, how long it has been happening, or whether anything has been damaged. What narrows it down is wood moisture content readings at more than one point rather than air humidity alone, knowing whether the soil is covered, and checking the water meter with every fixture off. Then the scope follows from the cause.

How often should a crawl space be inspected?

For a homeowner's own check, twice a year covers most Portland homes: once in early fall before the rains arrive, and once in spring after the wet season ends, with a mid-winter look after the first major storm if the house has any history of water. Most of what matters can be seen from the hatch with a flashlight. A contractor inspection is for when one of those checks turns something up, or when nobody has opened the hatch in years. The seasonal crawl space checklist sets out what to look at each time and what warrants a call.

Do I need an inspection before selling?

It is not required, but a crawl space finding discovered by the buyer's inspector during the option period is negotiated under time pressure, and one you already have a written scope for is not. If the buyer is financing with an FHA or VA loan, the appraiser can require conditions corrected before the file closes , on a clock you do not control. Selling a house with crawl space repairs covers what is worth fixing first.

Crawl Space Inspection in Portland, OR

Two different things get called a crawl space inspection in Oregon, and only one of them is free. What each one covers, what an inspector is looking at under a Pacific Northwest house, and how to verify the licence of whoever is doing it.

Free Inspection (503) 210-5062

Every inspection, quote, and repair is handled by an independent contractor licensed by the Oregon CCB (or Washington L&I across the river). We do the matching; they do the work.

19 service areas covered

free inspections

Verify any contractor's license: Oregon CCB or Washington L&I

Overview

What a Crawl Space Inspection Actually Covers

Last updated October 2, 2026

Two different things get called a crawl space inspection, they produce different documents, and only one of them is free. Sorting out which one you want is most of the work.

A contractor's pre-quote inspection is what most people mean. A licensed contractor opens the hatch, goes in with a light and a camera, works out what is wrong, and comes back with a written scope and a price. That is the visit the free inspection request books. It is free because it is the opening move of a bid, not a service anyone is selling you.

An Oregon certified home inspection is a different instrument entirely. It is the whole-house inspection ordered during a sale, performed by a CCB-certified home inspector, and your crawl space is one section of a much longer report. The board's standards of practice require the inspector to enter the under-floor space unless access is obstructed or entry would be damaging or dangerous, to report the method they used and any area they could not reach, and to report signs of abnormal or harmful water penetration or condensation. What they are not required to report is the cause of a problem, or the methods, materials and costs of correcting it.

Why that distinction costs people money: a report line reading "moisture present in crawl space" is a complete and correct home-inspection finding. It establishes a condition, on one date, and nothing else. It is not a diagnosis and it is not a quote. Homeowners routinely read it as though it were both, get three bids for three different jobs, and cannot work out why the bids disagree. What each inspection finding does and does not establish goes through the common report lines one at a time.

So: buying a house, you want the home inspection, and then a contractor to look at whatever it flags. Already own the house and something under it is wet, cold, or smells, and the contractor visit is the one that ends with an answer and a number.

“Free” means the visit is paid for by the work it finds

Nobody is donating an hour under your house. The cost of these visits is recovered from the jobs that come out of them, which is ordinary trade economics rather than a trick — but it has one consequence worth carrying into the appointment: the person diagnosing the problem is the person who would be paid to solve it.

That matters less than it sounds for whether you have a problem. A crawl space diagnosis is mostly observation, and a competent contractor looking at standing water and a torn barrier is generally right about what they are seeing. Where the incentive shows up is in the size of the recommended scope. Replacing a failed vapor barrier and encapsulating the whole assembly with a dehumidifier can both be defensible answers in the same crawl space, and they are several thousand dollars apart.

Four questions cost nothing and move the conversation from a pitch to a diagnosis:

What did you rule out, and how? A plumbing leak ruled out by checking the meter with every fixture off is different from one ruled out by looking around.
What is the smallest thing that would fix the problem I actually called about? There is almost always an answer, and it is worth hearing even if you go on to buy more.
Which line items solve a problem I have, and which prevent one I might get? Both can be worth buying. They are not the same purchase.
What happens if I do nothing for a year? Rot and active water get a real answer here. Some findings get an honest “not much”.

If you want a diagnosis with nothing attached to it, that is a thing you can buy: a CCB-certified home inspector for the condition report, or a licensed structural engineer where framing, posts or settlement are the question. Paying for an opinion is the only reliable way to get one from someone with no scope to sell.

Where this site stands: Portland Crawlspace Pros is not a contractor and performs no crawl space work — the matching service and how it is funded is set out in full. Contractors in the network pay a flat monthly fee for coverage in the areas they choose, not a share of the work and not a per-lead price, so nothing here earns more when a larger scope is sold. That is the reason this page can describe a free inspection the way it actually works.

Signs to Watch For

Signs You May Need a Crawl Space Inspection

A musty or earthy smell coming up through floor vents, baseboards, or the stairwell
Floors above the crawl space are cold in winter with the heat running
Standing water, or soil that stays soft and muddy between rain events
Visible insulation hanging down, or lying on the ground
Rodent droppings, nesting material, or shredded insulation near the access hatch
Floors that flex or bounce underfoot, or doors that have started sticking
A home inspection report that flagged the crawl space without saying what caused it
You are listing the house, or under contract, and want to know what a buyer will find
Nobody has opened the hatch in the years you have owned the house

Portland Context

Why a Crawl Space Inspection Matters in Portland

A crawl space inspection in the Willamette Valley and the Columbia corridor is mostly a moisture investigation. The metro sits under 36 to 45 inches of rain a year, most of it between October and March, and a crawl space here spends half the year within a few degrees of the dew point. Five things get looked at, roughly in this order, because each one changes what the next one means.

1. Water, and where it is coming from

Standing water is the finding that changes everything, and the first question is never "how do we seal it" but "where is it from". A plumbing supply or drain leak is the cheapest cause to rule out and the one that rewrites the whole scope. After that: downspouts discharging at the foundation, negative grade, a failed area drain, groundwater rising through the soil in the wet season, or a perimeter drain that has failed or was never there. An inspector who tells you the cause without checking the meter with every fixture off has skipped a step. Note also that a wet crawl space is one of the conditions that can make a space inaccessible to a home inspector — a report that says less about a flooded crawl space than a dry one is not a worse report.

2. The vapor barrier

What is on the ground, whether it is intact, whether it runs up the stem walls, and whether the seams are sealed. Oregon Residential Specialty Code R408 requires a continuous Class I vapor retarder over exposed earth, with joints overlapped and sealed, and edges extending not less than 12 inches up the stem wall. Most pre-1990 metro homes have either nothing, or a torn 4-mil sheet laid loose decades ago, which is a different finding from "no vapor barrier" and leads to a different scope. Vapor barrier installation is the narrow fix; encapsulation is the whole-assembly one.

3. Insulation

Sagging batt, wet batt, batt on the ground, or none at all. Wet fiberglass has lost most of its R-value and is a symptom rather than the problem — insulation gets wet because of item 1, and replacing it without fixing item 1 buys you a few winters. The inspector should record the existing R-value before anything is removed, because rebate paperwork depends on documenting what was there. Rim joists get their own look: condensation along the perimeter is one of the most common findings in 1970s-to-2000s metro tract homes.

4. Pests

Rodent runs, droppings, nesting material shredded out of the insulation, and the entry points that let them in. This matters to the scope well beyond the mess: contaminated insulation is handled and disposed of differently from clean material, and the exclusion work is a separate trade from the crawl space work. Wood-destroying organisms are a further separate inspection again.

5. Structure

Rot at the sill plate and rim joist, fungal growth on the underside of the subfloor, rusted hangers, sagging or bouncing floors above, and the condition of posts, piers and beams. In inner Portland's pre-1940 stock this is where the expensive findings live: original old-growth joists over a dirt floor with no barrier, sometimes on post-and-pier or rubble foundations.

One Pacific Northwest specific worth knowing before anyone recommends sealing: closing a crawl space changes how soil gas moves into the house. Oregon restricts unvented crawl spaces in new construction in the counties named in ORS 455.365 where radon-mitigating construction is required — which includes Multnomah, Clackamas and Washington — absent an approved mechanical ventilation system. Closed vs vented crawl spaces covers the code text and the exception.

Process

How a Crawl Space Inspection Works With a Licensed Contractor

Request the visit

Send your ZIP and a short description of what you are seeing through the free inspection form. It routes to a licensed contractor covering your area. Say up front if there is active water rather than a longstanding damp smell, and flag any closing date.
The inspection itself

The contractor enters the crawl space, photographs conditions, checks the five areas above, and identifies the moisture source rather than only its symptoms. Ask them to show you the photographs, not just describe them.
Written scope and quote

You receive a line-item scope: what is being installed, over what square footage, to what specification, and what it costs. No verbal-only quotes. If the visit produced a diagnosis you disagree with, this is the document a second contractor can price against.
Compare before you commit

Two quotes for the same house that describe different work are not really comparable. Run them through the bid checker, or work back through what the inspection actually established before deciding which scope is right.

Pricing Factors

How Much Does a Crawl Space Inspection Cost?

The contractor visit this site arranges costs nothing: it is the first step of producing a bid. An Oregon certified home inspection is a paid service, the inspector sets the fee, and the crawl space is one section of the report; no typical Portland-metro fee is published here because none has been sourced. Inspections for wood-destroying organisms, radon and mold sampling are separate again, each with its own specialist and its own fee.

Which inspection you are buying : A contractor's pre-quote visit is free. An Oregon certified home inspection is a paid service priced by the inspector, and the crawl space is one section of it.
Accessibility : A crawl space with an obstructed hatch, under 18 inches of clearance, or standing water may not be fully enterable. An inspector is required to report what they could not reach and why.
Whether a specialist is needed : Wood-destroying organisms, radon, and mold sampling are separate inspections by separate specialists, each with its own fee.
What the inspection leads to : Inspection findings translate into scopes with published ranges: vapor barrier $3,225 to $4,425, drainage $3,825 to $6,800, mold remediation $1,525 to $3,825, full encapsulation $10,100 to $12,325.
Square footage and clearance : The same variables that drive repair cost also drive how long an inspection takes and how much of the space actually gets seen.

See the full Portland metro cost guide

After the Visit

What a written estimate should contain

An estimate is not a contract, and the difference decides which rules apply to it. Oregon law is specific about what the contract has to say once the price passes $2,000 — the licence number, the seven required terms, the three notices — and the bid checker walks each provision against the document in your hand. Nothing specifies what an estimate must contain. That gap is why two bids for the same crawl space so often cannot be compared at all.

Six things make an estimate comparable. Ask for any that are missing before you get a second quote, because the second contractor should be pricing the same thing:

The square footage being priced. Without it there is no price per square foot, and price per square foot is the only way two differently-scoped bids can be set side by side.
Materials as numbers, not adjectives. Liner thickness in mils, insulation R-value, pump horsepower and switch type, pipe diameter, membrane product. “Heavy-duty vapor barrier” is a description, not a specification, and two contractors using that phrase may be 14 mils apart.
Where the work stops. How far up the stem wall the liner runs, whether piers are wrapped, which elevations the drain covers, where the discharge goes. Most disputes after the fact are about an edge nobody wrote down.
Exclusions, in writing. The common ones are drainage, rodent sanitising, mold remediation and rot repair — each of which can appear later as a change order. What each published range includes and excludes is the list worth reading the estimate against.
The findings the price rests on. Which conditions were measured and which were inferred: wood moisture content at more than one point, relative humidity, a water-meter check with the fixtures off. A scope built on measurements survives a second opinion; one built on impressions may not.
Which items are code and which are preference. A Class I vapor retarder over exposed earth is required by Oregon R408. A dehumidifier in a vented crawl space is a choice. Both may be right for your house; only one of them is not optional.

One practical test: a single total with no line items cannot be reduced a line at a time. If the number is more than you want to spend, an itemised estimate lets you drop or defer something specific, and a lump sum leaves you with nothing to negotiate except the whole job.

Before You Sign

Getting a second opinion

A second opinion is worth the fortnight it costs when one of these is true: the recommended scope is much larger than the problem you called about; the quote is the first and only one you have; the diagnosis and the fix do not obviously connect to each other; the total sits well outside the published range for that service; or you were asked to sign during the inspection itself.

It is usually not worth it for small single-scope work where the finding is plain and the number is in range — bare soil and no barrier, priced at the going rate, does not need adjudicating.

How to get a useful one. Give the second contractor the same information, not the first one's conclusion. Opening with “another company says I need encapsulation” sets an anchor, and the most common outcome is a bid built to beat that number rather than an independent read of the crawl space. Describe what you have seen, let them look, and compare afterwards.

When the two bids differ mainly on price, the cheaper one is often simply a smaller scope — read the exclusions. When they differ on the diagnosis, that is the more serious disagreement and the one worth spending money to settle: a paid home inspection or, where framing is in question, a structural engineer gives you a reading from someone with no work to win.

Two things about the way this site works are worth knowing here. An inquiry is routed to one contractor rather than auctioned to several, so a second opinion is something you arrange rather than something that arrives on its own — approach a second firm directly, or say that is what you want. And if you have already signed, Oregon gives a property owner until midnight the next business day to cancel an initial residential contract in writing, unless work was agreed to start immediately or has substantially begun. That right and its exceptions are set out in full on the bid checker.

Common Issues

See all crawl space problems and what causes them

More Crawl Space Repair

Related Crawl Space Repair Services

Sources

Oregon home-inspection standards, R408 code provisions, the ORS 455.365 radon-county exception, and Portland-area rainfall normals cited above.

Oregon Construction Contractors Board, Home inspector standards of behavior and standards of practice (OAR 812-008-0200 through 812-008-0214) Checked August 28, 2026

What an Oregon certified home inspection is required to cover and, more usefully, what it is not. OAR 812-008-0203(1) makes inspections visual and not technically exhaustive. OAR 812-008-0204(1)(b) and (c) state that inspectors are not required to report the causes of the need for a repair, or the methods, materials and costs of corrections — which is the rule behind the observation/diagnosis/scope/quote distinction the inspection article is built around. OAR 812-008-0205(2)(b)–(d) require the inspector to enter under-floor crawl spaces except where access is obstructed or entry would be damaging or dangerous, to report the method used and any inaccessible areas, and to report signs of abnormal or harmful water penetration or condensation. OAR 812-008-0213 covers insulation, vapor retarders and foundation-area ventilation in unfinished spaces. OAR 812-008-0202(2)(c)(F) requires the report to state that no person other than the purchaser of the inspection may rely on it.
Oregon Building Codes Division, 2023 Oregon Residential Specialty Code (ORSC) (2023 edition, based on the 2021 IRC) Checked October 7, 2026

Section R408 under-floor space requirements: ventilation openings and ratios for vented crawl spaces, Class I vapor retarder coverage and lap dimensions, and the three conditioning methods that permit an unvented crawl space: continuously operated mechanical exhaust or a conditioned air supply, each at 1 cfm per 50 square feet, or dehumidification sized in accordance with the manufacturer’s specifications (R408.3 item 2.3), which sets no pints-per-day figure. Also R408.2.4, which lists the six permitted ventilation-opening coverings and caps their least dimension at 1/4 inch — the figure that decides whether a code-compliant foundation vent screen excludes mice as well as rats.

Note: Effective October 1, 2023 (construction provisions mandatory April 1, 2024). The 2026 edition took effect October 1, 2026. Under OAR 918-480-0005 this 2023 edition, apart from Chapter 1, stays adopted through March 31, 2027, and building departments must accept plans designed to either edition until then, so confirm which one a permit is reviewed under before relying on a section number. What did and did not change for crawl spaces is tracked at /oregon/2026-crawl-space-code-changes/.
Oregon Building Codes Division, 2026 Oregon Residential Specialty Code — RMSB review code review matrix (Structural, Fire and Life Safety, Mechanical) (26orsc-matrix.pdf, 17 pages) Checked October 2, 2026

Every crawl space entry in the 2026 code tracker: the R408.2 under-floor vapor retarder, ventilation ratio, vent placement and vent covering amendments (page 9, outcome Retain); the committee’s approved add-back permitting a continuously operated mechanical ventilation system at 1.0 cfm per 50 square feet in place of foundation vents (page 9, outcome Approve); the R408.3 unvented crawl space amendment (page 9, outcome Retain); the deletion of R408.8 (page 9, outcome Approve); and Appendix BE (AF) Radon Control Methods (page 15, outcome Retain).

Note: A record of what the code review committee recommended, which the Residential and Manufactured Structures Board approved and sent to public hearing. It is not the adopted code text. The adopting rule takes the 2024 IRC “as further amended by the Division”, and this site has not yet been able to read the published 2026 ORSC to confirm that each outcome recorded here carried through unchanged.
Oregon Health Authority, Radon Program Checked September 1, 2026

Radon testing guidance and action levels for Oregon homes, referenced because sealing a crawl space changes how soil gas enters a house.
NOAA National Weather Service, Portland, Portland Climate Book — precipitation normals (1991–2020 climate normals) Checked August 20, 2026

Portland-area rainfall totals and their seasonal distribution, the basis for every statement on this site about the wet season and its timing.

Sources last checked between August 20, 2026 and October 7, 2026; the date beside each one is when it was last opened. Where a figure comes from a document that is revised on a schedule, the edition or version is named above so you can confirm it against the current one yourself.

Questions, Answered

Crawl Space Inspection FAQs

: The contractor visit this site arranges is free, because it is the first step of producing a bid rather than a service being sold. An Oregon certified home inspection, the whole-house kind ordered during a sale, is a paid service and the inspector sets the fee. No typical Portland-metro figure for that fee is published on this site, so none is quoted here; ask the inspector directly, and ask whether the crawl space is inside the base fee or priced separately.
: A home inspection establishes conditions and is deliberately not required to establish causes, methods, materials or costs. A contractor inspection exists to produce exactly those four things, because it ends in a bid. They answer different questions, and a homeowner who orders one expecting the other ends up frustrated with a report that was correct all along. See crawl space problems in a home inspection.
: Oregon construction work requires an active CCB licence; Washington work requires an active L&I licence, and the two do not transfer across the Columbia. Home inspectors in Oregon are certified by the CCB separately from contractor licensing. How to verify an Oregon contractor licence walks through the lookup and what to check on the record beyond "active".
: Not always, and that is by the rules rather than by preference. Oregon home inspection standards require entry to the under-floor area except where access is obstructed or entry would be damaging or dangerous, and require the inspector to report the method used and any inaccessible areas. Wet crawl spaces are among the conditions the board itself lists as not inspected. If a report says the space could not be entered, that is information, not an omission.
: Treat it as an observation and nothing more. It has not established where the water comes from, whether it is seasonal or permanent, how long it has been happening, or whether anything has been damaged. What narrows it down is wood moisture content readings at more than one point rather than air humidity alone, knowing whether the soil is covered, and checking the water meter with every fixture off. Then the scope follows from the cause.
: For a homeowner's own check, twice a year covers most Portland homes: once in early fall before the rains arrive, and once in spring after the wet season ends, with a mid-winter look after the first major storm if the house has any history of water. Most of what matters can be seen from the hatch with a flashlight. A contractor inspection is for when one of those checks turns something up, or when nobody has opened the hatch in years. The seasonal crawl space checklist sets out what to look at each time and what warrants a call.
: It is not required, but a crawl space finding discovered by the buyer's inspector during the option period is negotiated under time pressure, and one you already have a written scope for is not. If the buyer is financing with an FHA or VA loan, the appraiser can require conditions corrected before the file closes, on a clock you do not control. Selling a house with crawl space repairs covers what is worth fixing first.

Ready to Fix Your Crawlspace?

Get matched with a licensed local contractor - Oregon CCB, or Washington L&I across the river - for a free in-home inspection, with no obligation.