Replacement Window Installer (Subcontract) Business
Install double-pane windows and doors for window dealers and general contractors, with no showroom or sales needed.
- $3k-12k
- Part-time
- Out and about
- Licence or permit needed
Estimates for a small start in the US, not guarantees.
Official data
6,945 US businesses with employees in this field, +2.8% in a year
NAICS 238150 “Glass and glazing contractors”. Source: U.S. Census Bureau, County Business Patterns 2023.
What it is
You fit double-pane replacement windows and doors that someone else has sold and ordered. That means measuring, removing old units, installing, sealing, flashing and trim. You work as a subcontractor for window dealers, remodelers and general contractors.
Your first three steps
- Check your state and city contractor licensing rules for window installation, and whether a subcontractor needs its own license
- Get general liability insurance and, if the homes may be older, ask about EPA lead-safe (RRP) certification
- Contact local window dealers and remodelers, show photos of your work and offer a paid trial install
Who pays
Window dealers, home improvement companies, remodeling contractors and property managers who need reliable installers.
How it makes money
Usually a set price per window or door installed, or a day rate. Faster, cleaner work means more installs per week and repeat jobs from the same contractors.
Skills that help
- Carpentry and finishing basics
- Accurate measuring
- Working safely at height and with heavy glass
- Reliable and tidy around customers' homes
Watch out for
- State or local contractor license rules vary a lot, so check with your state licensing board and city or county
- EPA lead-safe work rules may apply in homes built before 1978, so check requirements and training
- General liability insurance, and workers' compensation if you hire helpers
- Window damage, leaks and callbacks can come out of your pay, so agree warranty terms in writing
- Heavy lifting and ladder work, so plan for safety and a helper on large units
- Relying on one or two contractors for most of your work is risky
🔒 Full research report for US
Real cost breakdown with current prices, licences and registration checklist, local competition, pricing, break-even and a 30-day launch plan, with sources.
Coming soonQuestions people ask
How much does it cost to start a window installation subcontracting business?
Startup costs are typically around $3,000 to $12,000, depending on your tools, vehicle setup and insurance. These are estimates, not quotes, so price your own tools and coverage before you commit to any spending.
How much can a subcontract window installer earn?
Monthly revenue is typically around $4,000 to $18,000, depending on how many hours you work, how many installs you book and whether you use a helper. This is an estimate of revenue before your costs.
Do I need a license to install windows as a subcontractor in the US?
Contractor license rules vary a lot, so check with your state licensing board and your city or county. Also check EPA lead-safe work rules for homes built before 1978, and what insurance you need, including general liability.
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