How to Build a Construction Company to Sell.
Building a commercial subcontractor business to sell takes 5 to 7 years of preparation across five areas: clean books with normalized owner compensation, gross margin discipline at 22% to 30%, recurring or repeatable revenue patterns, owner independence (the business runs without the owner in daily decisions), and bonding/banking relationships that transfer cleanly to a buyer. The valuation target for a well-prepared $12M commercial sub is approximately $7.8M.
If you are 5 to 10 years out from a potential sale and want the business to be worth what you have built it to be, this page is the standard you build against starting now.
Five Things, All Trainable.
Buyers of commercial subcontractor businesses evaluate against a short list. None of it is mysterious. All of it takes years to install properly.
1. Clean financials with normalized owner compensation. Three years of P&L, balance sheet, cash flow, and WIP that reconcile cleanly. Owner taking a real salary on payroll, not draws. Personal expenses out of the business. Books closed within 10 business days of month end every month, not just at year end. This is the table-stakes requirement. Without it, the conversation does not start.
2. Gross margin discipline. The CFOS target for commercial subs is 22% to 30% gross. Buyers want to see consistency, not just one good year. Three to five years of gross margin in the target band signals operational competence. Variable gross margin signals a business that runs on luck.
3. Recurring or repeatable revenue patterns. Single-project, one-and-done revenue is hard to value. Master service agreements, multi-year framework contracts, repeat GC relationships, and a backlog that books out 6 to 12 months forward all signal sustainable revenue. Buyers pay multiples on predictable revenue, not on revenue that arrived because the phone rang.
4. Owner independence. The business runs without the owner making every operational decision. PMs run jobs. Estimators win work. A general manager or operations lead handles day-to-day. The owner can be on vacation for two weeks and the business operates normally. A business that requires the owner in daily decisions is worth less because the buyer is also buying themselves a job.
5. Transferable bonding and banking. Bonding relationships that can transfer to new ownership without losing capacity. Bank lines that survive the change of control. Insurance arrangements that travel. The Construction CFO works with bonding agents on this specifically in the 24 months leading up to a sale.
Five to Seven Years Is the Window.
Buyers underwrite against three to five years of clean historical financials. To deliver that, the financial discipline has to start years before the sale conversation begins.
Year 1 to 2 before sale: deep diligence preparation. Final cleanup of any historical accounting issues. CPA confirmation that everything is GAAP-clean. Confidential information memorandum drafted. Broker or M&A advisor engaged.
Year 3 to 5 before sale: operational independence build. Owner steps back from daily operations. Senior team is fully empowered. Customer concentration is diversified if one GC is over 40% of revenue. Backlog visibility extended to 9 to 12 months forward.
Year 5 to 7 before sale: financial system installed. Job costing aligned to estimate. Monthly WIP discipline. Owner salary normalized. Personal expenses separated from business. Gross margin moved into the 22% to 30% target band consistently.
Year 7+ before sale (right now if you are reading this and the timeline matters to you): make the decision to build to sell. Define the target valuation. Reverse-engineer from there to required revenue, margin, and structure.
What a $12M Commercial Sub Is Actually Worth.
Commercial subcontractor businesses sell on EBITDA multiples. Typical range across industries is 2.5x to 4.5x EBITDA, with quality of earnings, owner independence, and customer concentration driving where the multiple lands.
The Construction CFO target structure for a $12M commercial sub:
Revenue: $12M. Net profit at 12% = $1.44M. Owner compensation normalized at $180K base plus distributions. Add-back of any remaining owner-personal expenses. EBITDA approximately $1.7M to $1.9M.
At a 4.0x to 4.5x multiple (achievable with clean books, gross margin discipline, owner independence, and diversified customer base): valuation $6.8M to $8.5M. Midpoint approximately $7.8M.
At a 2.5x multiple (lower end, owner-dependent, concentrated customer base, inconsistent margins): valuation $4.3M to $4.8M.
The gap between $4.5M and $7.8M is roughly $3.3M of value, and it lives entirely in how the business is built. Same revenue. Same crews. Same trade. Different valuation because of how the financial layer and the operating model are structured.
What Sellers Realize Too Late.
Three mistakes show up in nearly every commercial subcontractor sale conversation, and all three are preventable years earlier.
Personal expenses on the company books. The truck the owner drives. The boat at the lake house. The kid's college tuition. All charged to the business over the years and now embedded in the P&L. Buyers identify these, demand add-backs, and the seller fights to defend each one. The conversation goes badly. The fix is to clean this up 3 years before sale, not 30 days before.
Owner compensation not on payroll. The owner has been taking draws for ten years. The P&L shows zero owner compensation. Buyers normalize at $150K to $250K and reduce the valuation accordingly. The fix is to put the owner on payroll years earlier so the historical financials reflect normalized comp from the start.
Single GC concentration over 40%. A $6M sub with 65% of revenue from one GC is hard to sell because the buyer worries the relationship walks when the owner exits. The fix is deliberate diversification 5 years before sale, working down concentration to under 35% before going to market.
One real engagement: a $13.5M marine general contractor wanted to sell and found the business was not worth what they had built it to be. The financial system was lacking. Four accounting staff, no job costing, no per-project reporting. A buyer does not pay for revenue. They pay for provable, sustainable profit. SPM built the job costing structure, tightened spending that had not been scrutinized for years (subscriptions, vendor relationships, material purchasing), and put a twice-monthly reporting cadence in place for every job. Net profit went from 7% to 14% on the same revenue, recovering $917K a year of margin that was already inside the business. Valuation went from $2.3M at a 2.5x multiple to $5.5M at a 3x multiple. Nine months. $3.2M of additional business value, same revenue, same crews, same work.
