Crawl Space Encapsulation
Selling peace of mind, one vapor barrier at a time
Crawl space encapsulation businesses seal off the underside of homes with heavy-duty vapor barriers, insulation, and dehumidifiers to prevent moisture damage, mold, and structural decay. Average job value runs $3,000–$8,000, and franchises like Crawlspace Medic report average operator revenues of over $1 million annually at 60% gross margins. The $1.2 billion market is growing at 9% per year as aging housing stock and climate anxiety push homeowners to act. Customers rarely shop on price — they shop on fear.
Avg Revenue
$850K
Profit Margin
22%
Acquisition Multiple
2.5x - 3.75x
Startup Cost
$50K - $200K
Difficulty
3/5
How It Works
Homeowners call when they notice moisture, musty odors, or pest activity under their home. A technician inspects and quotes a job ($3,000–$8,000 on average). The crew lays a thick polyethylene vapor barrier across the crawl space floor and walls, seals vents, installs insulation, and adds a dehumidifier. Work takes 1–2 days per job. Revenue compounds as customers refer neighbors and add annual maintenance contracts.
Revenue Range
Real Acquisitions in This Category
SBA 7(a) change-of-ownership loans · NAICS 238310 · Drywall and Insulation Contractors
Deal Size Distribution
Deal Flow Over Time
Financing Profile
Recent Comparable Deals
| Closed | State | Loan | Implied deal | Jobs | Franchise |
|---|---|---|---|---|---|
| Dec 2025 | GA | $550K | $647K | 3 | Koala Insulation |
| Nov 2025 | WA | $150K | $177K | 14 | — |
| Apr 2025 | WA | $713K | $839K | 21 | — |
| Mar 2025 | GA | $5.0M | $5.9M | 15 | — |
| Mar 2025 | GA | $728K | $857K | 9 | — |
| Feb 2025 | MA | $1.4M | $1.6M | 16 | — |
| Feb 2025 | OH | $4.5M | $5.3M | 57 | — |
| Feb 2025 | OH | $500K | $588K | 57 | — |
| Jan 2025 | MA | $3.9M | $4.6M | 31 | — |
| Dec 2024 | CA | $1.0M | $1.2M | 9 | — |
Source: SBA 7(a) FOIA dataset, filtered to acquisitions (loans where business age is "Change of Ownership"). Implied deal size assumes an 85% loan-to-purchase ratio, a common SBA change-of-ownership structure. Charge-off rate shown only when 10+ loans have resolved (paid in full or charged off). Interest rates reflect last 24 months only. Actual deal values vary with equity injections, seller financing, and working capital terms.
Pros
- +High average ticket ($3,000–$8,000) with short job duration (1–2 days)
- +Franchise data shows 60% gross margins at scale
- +Recession-resistant — homeowners protect their biggest asset regardless of the economy
- +Repeat revenue from dehumidifier maintenance contracts and annual inspections
- +Market growing 9% per year driven by aging housing stock
Cons
- -Physical, unpleasant work in tight, dark, dirty spaces
- -Customer acquisition cost is high — most leads come from paid ads or referrals
- -Licensing and insurance requirements vary significantly by state
- -Seasonal slowdown in colder markets (crawl spaces freeze, work pauses)
Best For
Tradespeople or entrepreneurs with home services experience looking for high-ticket, fast-cycle jobs with strong upsell potential
Operating Costs
Major costs: crew wages (40% of revenue), materials (vapor barrier, insulation, dehumidifiers — 15–20%), vehicle and equipment costs (5%), and marketing/lead gen (8–12%). Net owner earnings on a $850K revenue business typically run $120–$180K. Franchise models (Crawlspace Ninja, Crawlspace Medic) lower startup risk but take 7–10% royalties.
SBA Financing Estimator
Adjust the deal — see if it cash flows after debt service
Estimates only. Excludes owner compensation, capex, working capital draws, and taxes. Margin assumes average occupancy and volume. Actual SBA terms vary by lender and borrower profile.
Where to Buy
Search active listings for crawl space and waterproofing businesses for sale
Franchise option with disclosed average revenue over $1M at 60% gross margin
The largest acquirer in the crawl space and basement waterproofing space — benchmark for exit multiples
Acquisition Score
Scores margin (30), entry multiple (25), SBA market depth (20), category risk (15), and deal momentum (10). Higher = better acquisition candidate.
Quick Facts
- Category
- service
- Difficulty
- 3/5
- Buy price
- $2.1M–$3.2M
Buyer's Toolkit
Essential tools to get started
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Largest business-for-sale marketplace in the US
SBA loans and business acquisition financing — get funded fast
ROBS financing — use retirement funds to buy a business tax-free
Bookkeeping for small business owners — hands-off financials
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