How much is a windows and doors business worth?

Short answer: most owner-run window and door replacement companies sell on SDE — the cash the business throws off for one owner — at the small-deal multiples in the IBBA ladder below, not on revenue and not on your best month of signed contracts. There is no verified trade-specific realized multiple for this trade, so this page says so and builds the number from category data instead. Start with the Windows & Doors page, then run your own figures in the valuation calculator.

The number

BizBuySell's trailing-five-year realized data does not break out window and door replacement as its own category, so there is no honest trade multiple to quote you. What exists is category data, labeled as category data. Size moves the multiple more than almost anything. The IBBA Market Pulse survey (Q2 2026) puts realized pricing at 2.0x SDE for deals under $500K, 2.8x SDE at $500K-$1M, 3.1x SDE at $1M-$2M, 4.8x EBITDA at $2-5M, and 5.8x EBITDA at $5-50M. Same trade, same margins — a bigger, less owner-dependent business simply gets a different multiple.

For an anchor, public companies in Engineering/Construction trade at 17.18x EBITDA — Damodaran Online, January 2026. No public company sells replacement windows door-to-door the way you do; this bucket is a proxy. That is not your price. It is the opportunity-cost anchor a buyer measures your shop against: money parked in large, liquid companies earns that multiple, so a small, illiquid one has to be cheaper per dollar of earnings.

Worked example — shown math, assumptions labeled:

• Revenue: $1,200,000
• SDE margin: 20% — an assumption, not a benchmark; in-home sales models spend heavily on leads and commissions, so test yours
• SDE: $1,200,000 x 20% = $240,000
• Multiple: 2.8x SDE — the IBBA tier for a deal priced at $500K-$1M (Q2 2026)
• Indicated value: $240,000 x 2.8 = $672,000, before debt, and before any showroom real estate, which is priced separately

How buyers actually value a windows and doors business

Buyers in this trade do not buy your revenue. They buy three things, in this order. First, the costed backlog: signed contracts, each tied to a deposit, a product order, and an install date. A deposit you already spent on overhead is a liability, not an asset, and buyers reconcile deposits to jobs one by one. Second, the lead machine: what does a signed contract cost you? A shop spending 15% of revenue buying leads from marketplaces owns a bill, not a channel. A shop generating referrals and repeat neighborhood work at 5% owns something transferable. Buyers underwrite your cost per appointment, close rate, and whether anyone besides you can close in the living room. Third, the lines you carry: an exclusive dealer territory for a manufacturer homeowners actually ask for by name is worth money; a line the manufacturer can pull or hand to the shop across town is worth almost none.

What raises the price — and what kills it

Raises it:

• A sales team that closes without you in the home — documented close rates by rep, not by memory
• A backlog of 8-12 weeks, costed job by job, with deposits intact in the account
• Owned lead flow: referrals, past-customer rehash, and neighborhood canvassing that costs a fraction of purchased leads
• A repair and service department — small tickets, yes, but recurring contact with every past customer
• Exclusive or protected dealer territory with the paperwork to prove it

Kills it:

• You are the top closer and the measure tech and the complaint department
• Deposits spent before the product is ordered
• One manufacturer line carrying the whole business, terminable at will
• Warranty callbacks with no reserve and no log
• A showroom lease (or building) priced into the deal as if it were earnings

Move your number

Three levers, all specific to this trade. Cut lead cost, keep the closes. Every point of revenue you stop handing to lead marketplaces drops straight into SDE, and SDE is what gets multiplied. Automated follow-up on the estimates that did not close on night one — day 2, day 7, day 21 — is the cheapest recovered revenue in this business; that is the kind of system the ClaroPro team builds for owner-operators. Fix the deposit-to-payment chain. Big tickets paid by card, staged deposits, and balances collected at install instead of 45 days later change your cash conversion; the Finix payments team works on exactly that cost and timing problem for home-services companies. Turn the backlog into a system. A real pipeline — lead, appointment, contract, order, install, warranty — that a buyer can read without you narrating it is what a Nova engineering team builds when off-the-shelf tools stop fitting. Run your new math in the calculator, prefilled for windows and doors.

This is an educational framework with the math shown — not an appraisal, and not a promise of what your company will fetch. A real price is set by a real buyer on a specific day. The caveats on this page exist to protect you, the owner: so you do not overpay for an acquisition, accept an undersell on your own exit, or sign a deal whose backlog math you never checked. We are on the side of the business owner — that is the whole point of showing the work.