Commercial Door Service
Every loading dock, automatic door, and fire door in America needs annual service
Bottom line
Worth studying, but do not buy without strong local proof.
Commercial door service companies install, repair, and maintain the full range of commercial doors: automatic sliding/swing doors at retailers and hospitals, overhead rolling steel doors at warehouses, high-speed fabric doors at distribution centers, and loading dock equipment. Critically, fire doors are required by NFPA 80 to be annually inspected and certified — creating a mandatory recurring revenue stream. A 10-technician operation servicing a mix of retail, industrial, and healthcare clients generates $1M–$3M in annual revenue with stable 30–40% gross margins.
Avg Revenue
$1.2M
Profit Margin
35%
Acquisition Multiple
2.5x - 5x
Startup Cost
$50K - $200K
How It Works
Technicians respond to emergency repair calls (a broken door is an emergency for a retailer or warehouse) and perform scheduled preventive maintenance under annual service contracts. Fire door inspection is code-mandated: any building with fire-rated doors must have them inspected and tagged annually. You build a book of service contracts (monthly recurring), respond to emergency repairs (high margin), and quote new door installations (capital project). Emergency calls carry 2–4x premium labor rates.
Revenue Range
BizBite underwriting snapshot
Watch / verify
Commercial Door Service has enough high-level data for a first look, but BizBite has not assigned a category-specific operating model yet. Treat the score as preliminary.
Category-level fit before lender-specific diligence.
Weak source data caps the final score.
Why it may work
- +Attractive 35% estimated margin profile
- +SBA dataset shows 59 recent comparable loans
Be careful
- !Source link status has not been verified yet
- !No last-checked date yet
- !No category operating model yet
- !No category model yet
Real Acquisitions in This Category
SBA 7(a) change-of-ownership loans · NAICS 811310 · Commercial and Industrial Machinery and Equipment (except Automotive and Electronic) Repair and Maintenance
Deal Size Distribution
Deal Flow Over Time
Financing Profile
Recent Comparable Deals
| Closed | State | Loan | Implied deal |
|---|---|---|---|
| Mar 2026 | NY | $3.3M | $3.8M |
| Mar 2026 | FL | $2.8M | $3.2M |
| Feb 2026 | WA | $900K | $1.1M |
| Feb 2026 | AZ | $1.4M | $1.7M |
| Feb 2026 | TX | $1.2M | $1.4M |
| Feb 2026 | TX | $250K | $294K |
| Jan 2026 | TX | $200K | $235K |
| Jan 2026 | NY | $500K | $588K |
| Jan 2026 | TX | $1.3M | $1.5M |
| Jan 2026 | MD | $965K | $1.1M |
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
- +Emergency-driven demand: a broken loading dock door or jammed automatic entry is always urgent
- +NFPA 80 fire door compliance creates mandatory annual inspection revenue
- +Service contract model (recurring) plus emergency repairs plus new installs — three revenue streams
- +Strong acquisition multiples for established businesses with recurring contract bases
Cons
- -Requires certified technicians (AAADM for automatic doors, DHI for door hardware)
- -Capital intensive — service vans, inventory of door parts, and test equipment
- -Emergency calls require 24/7 on-call coverage, which adds staffing complexity
Best For
Operator-investors comfortable with skilled-trade service businesses; strong fit for those with construction or mechanical service backgrounds
Operating Costs
Service vans (~$40K–$60K each), parts inventory, and technician wages (union or certified technicians earn $60K–$90K/year) are primary costs. Service contracts anchor recurring revenue; emergency calls and project work are the margin drivers.
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
Commercial door and specialty contractor businesses for sale nationally
M&A advisory firm specializing in service business acquisitions including mechanical/specialty contractors
Industry association for commercial door and hardware professionals with buyer/seller contacts
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
- $3.0M–$6.0M
Buyer's Toolkit
Essential tools to get started
Some links may be affiliate links. We only recommend tools we'd use ourselves.
Ready to Buy? Start Here →
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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