Printable bid worksheet

Radon mitigation bid checklist for comparing contractor scopes.

Use this page during estimate calls, inspection negotiations, or final bid review. The goal is to make each proposal show the same system details before you compare price.

Open checklist Estimate cost first

Collection design Suction point count, pressure-field testing plan, foundation areas covered, and what changes if the slab or crawl space does not communicate.

Routing and fan Fan model, interior or exterior pipe route, roofline discharge location, electrical connection, condensate handling, and visible manometer placement.

Included adders Sump lid, crawl-space membrane, seam tape, edge sealing, slab patches, permits, finished-wall repair, cleanup, and warranty labor.

Verification Post-mitigation test timing, who supplies the kit, acceptable result threshold, retest cadence, and what happens if the first post-work test is still elevated.

Calculator-derived worksheet

Printable contractor comparison checklist

Use this checklist to compare mitigation bids and frame a seller-credit discussion. It is a planning aid, not legal advice, a contract demand, or a substitute for a contractor inspection.

Questions to ask each contractor

1 Confirm suction point count, fan model, pipe route, and exterior discharge location.
2 Ask whether sealing, sump lid work, permits, electrical work, and cleanup are included.
3 Require a post-mitigation test plan and written warranty terms before comparing final bids.
4 Basements vary by slab condition, finished-wall routing, and whether the fan can stay outside.
5 Will the bid include a written post-mitigation test window and who pays for the kit?
6 What parts, labor, fan, sump-lid, sealing, and discharge-route items are excluded from this number?

Scope

Suction points, pressure-field testing, pipe route, fan location, discharge height, and cleanup.

Add-ons

Sump lid, crawl-space membrane, electrical outlet, permits, sealing, and finished-wall repairs.

Proof

Post-work radon test, warranty length, fan model, installer certification, and expected timeline.

Assumptions to verify before relying on the range

Basement: Sub-slab suction, fan, PVC route, crack sealing, and post-work verification test.
Default for most planning estimates when the local bid environment is unknown.
Typical finished-home constraints with a manageable pipe route and normal sealing work.
Open or loose sump pit needs a sealed, serviceable cover.

Side-by-side bid review

Fill the same line items for every proposal

A cheaper bid is only useful if it includes the same foundation areas, sealing work, testing plan, and warranty response as the more complete proposal.

Line item	Bid A	Bid B	Bid C
Installed price and payment schedule	Notes	Notes	Notes
Suction points and fan model	Notes	Notes	Notes
Pipe route and discharge location	Notes	Notes	Notes
Sump, crawl-space, and sealing scope	Notes	Notes	Notes
Permit, electrical, and repair allowances	Notes	Notes	Notes
Post-mitigation test and warranty response	Notes	Notes	Notes

Scope clarifications

Treat these bids as not comparable until the missing details are written down

Many mitigation estimates use similar words but price different work. Before using the cheapest total for a seller credit, repair negotiation, or contractor selection, separate exclusions from true savings.

The bid only says "sub-slab system"

That can hide whether the contractor priced one suction point, pressure-field testing, sump integration, slab patching, or a route that works for the actual foundation.

Ask: Ask for the suction point count, planned test holes, fan location, pipe route, and what happens if one point does not communicate under the slab.

Crawl-space or sump work is listed as allowance

Allowances can make a low total look comparable even though membrane square footage, seam tape, edge sealing, sump lid work, and access labor are still unresolved.

Ask: Ask for the crawl-space square footage, membrane thickness, seam treatment, sump lid model, and the unit price for any added sealing work.

Testing and warranty are vague

A bid without a written post-mitigation test window or warranty response leaves you guessing who pays if the first result remains elevated.

Ask: Ask who supplies the test, when it should be run, what result threshold triggers follow-up work, and how long fan and labor coverage lasts.

Testing and disclosure

Document the result after the fan is running

This worksheet is a planning aid, not a contractor quote, inspection report, health determination, or legal opinion. Use current state and EPA guidance when deciding how to act on a radon result.

Use a post-mitigation test to document that the system lowered indoor radon after installation.
EPA consumer guidance says a post-mitigation radon test should be done within 30 days of system installation.
Plan periodic retesting, especially after renovations, lower-level occupancy changes, or an older sale-ready test.
Keep the test result, warranty, fan model, manometer photo, and contractor invoice together for resale or disclosure conversations.

EPA action level guidance EPA home retesting guidance EPA Consumer Guide to Radon Reduction

Verification products

Test kits and monitors by scenario

Use products like these to confirm an initial reading, document a post-mitigation check, or watch longer-term trends after work is complete.

Affiliate disclosure

Partner tracking is not configured right now, so these product links use non-affiliate fallback URLs.

Initial check

Short-term radon test kit

mail-in short-term test kit

The homeowner needs a low-cost initial or post-work spot check before comparing bids.

View option

This product link is a non-affiliate fallback while partner tracking is not configured.

Post-work verification

Long-term radon test kit

alpha-track long-term test kit

The homeowner wants a seasonal average after mitigation or during negotiations.

View option

This product link is a non-affiliate fallback while partner tracking is not configured.

Ongoing tracking

Continuous radon monitor

connected continuous monitor

The homeowner wants ongoing trend visibility after a failed test or new mitigation system.

View option

This product link is a non-affiliate fallback while partner tracking is not configured.

Ongoing tracking

Radon-only smart monitor

plug-in radon monitor

The homeowner wants a radon-focused monitor instead of a broader air-quality device.

View option

This product link is a non-affiliate fallback while partner tracking is not configured.

Installation cost guide

See the foundation and routing factors that move installed prices.

System cost guide

Review fan, pipe, sump, crawl-space, permit, and testing line items.

Calculator

Estimate installation and 10-year ownership before comparing bids.

FAQ

Bid checklist questions

How should I compare radon mitigation bids?

Compare the written scope before comparing the total. Suction points, fan location, discharge route, sealing work, sump lids, crawl-space membranes, permits, post-work testing, and warranty response should be visible.

Can this checklist be used for a seller credit?

It can frame a planning conversation, but it is not legal advice or a contract demand. Real estate terms, disclosures, and repair credits should be reviewed with qualified local professionals.

What proof should I ask for after mitigation?

Ask for a post-mitigation test plan, system documentation, warranty terms, fan model, manometer or warning device details, and clear next steps if the result remains elevated.