How to Bid a Residential Construction Job as a Small GC

This is about pricing and submitting your own bid to build a new home for a client, not remodel pricing, and not evaluating bids you’ve received from subs (we cover that separately in how to compare construction bids). Bidding a ground-up custom home has its own structure, and most generic bidding guides blur it together with remodel work and commercial jobs, where the scope, the payment structure, and the risks are all different. Get the structure right and you win jobs on the strength of your documentation. Get it wrong and you either lose the bid to a sloppier but lower number, or win it and quietly lose money for the next nine months.

What Makes Bidding a New Home Build Different

A remodel bid deals with unknowns: what’s behind the wall, what condition the existing systems are in, surprises you can’t fully see until demo starts. A new home build starts from a complete, known scope, a stamped plan set with every dimension and system specified before you price a single line. What it adds instead is more trades, more phases, and a payment structure usually tied to the client’s construction loan, meaning a lender’s inspector is verifying your progress before you get paid, not just the client signing off.

What to Gather Before You Price the Job

Don’t start pricing until you actually have these in hand. Bidding off an incomplete plan set or a verbal description of the scope is how a good number turns into a bad one three months into the job.

• The full plan set: stamped architectural and structural drawings, plus the civil or site plan
• Finish selections, or allowance numbers if selections aren’t finalized yet. See our construction allowances guide for how to set these correctly so they don’t cost you later
• A site visit. Topography, access, and existing conditions all move your price
• The local permit and impact fee schedule, since these vary by jurisdiction and are easy to underprice if you’re bidding outside your usual area
• The client’s financing and draw expectations, especially if their lender will control the payment schedule

Building the Bid Line by Line

Price it the same way you’d build a full estimate, not a lump sum and not a single per-square-foot number. See our cost breakdown by trade for the full category list. Get real sub quotes wherever you can instead of relying on allowances for anything beyond finish selections. Include your general conditions (supervision time, tools, temporary facilities, insurance) as their own line, not folded invisibly into another category. State your overhead and profit as an explicit percentage, not a number you back into after the fact. And carry a real contingency, not a token one, since new construction bids submitted before every selection is locked in carry more scope risk than the plans alone suggest.

A Worked Example: Pricing Overhead, Profit, and Contingency

Say your direct costs, every trade line item added up, come to $380,000 for a new home build. Add general conditions at roughly 5 percent ($19,000) to cover your supervision, tools, and temporary facilities during the build. Add a contingency of 8 percent on total direct costs ($30,400) to cover the scope risk that comes with pricing off plans before every selection is locked. That brings your subtotal to $429,400.

Now add your overhead and profit. A common structure for a small residential GC is 10 percent overhead (covering your office costs, insurance, and business expenses) plus 10 percent profit, applied to that subtotal. That’s roughly $85,880 combined, bringing your total bid to approximately $515,280.

The point isn’t that these exact percentages are right for your market, they vary by region and by how competitive your bidding environment is. The point is that every one of these numbers is its own visible line, not a markup you’re guessing at or burying inside your material costs. A client, or their lender, can see exactly what they’re paying for.

Fixed-Price or Cost-Plus: How the Structure Changes Your Bid

The contract type you’re bidding under changes how you present the number itself. A fixed-price bid needs to be airtight on scope and allowances since you’re carrying the risk of anything you missed. A cost-plus bid shifts that risk to the client but requires you to be transparent about your fee structure from the first page. We break down the full tradeoffs in our fixed-price vs cost-plus guide. Decide which structure you’re bidding under before you build the number, not after.

What to Include in the Bid Document Itself

• A clear scope of work the client can read without a construction background
• Every allowance listed by name and dollar amount, not buried in a footnote
• A proposed payment or draw schedule, tied to milestones, not just monthly. Our construction draw schedule guide covers how this typically gets structured
• Explicit exclusions: what’s not included is as important as what is
• A bid validity window, 30 to 60 days is typical, since material prices move and an open-ended bid is a bid you might have to honor at a loss
• Proof of license and insurance, included proactively instead of waiting to be asked

Common Pricing Mistakes That Cost Small GCs the Job or the Profit

• Bidding off a stale per-square-foot number instead of an actual line-item takeoff for this specific plan set
• Leaving overhead and profit implicit instead of stated as a clear percentage you can defend if a client questions it
• Ignoring the financing cost of retainage. Money held back until closeout, often for months, has a real carrying cost if you’re floating payroll and material costs in the meantime
• Underpricing to win the job and planning to make up the margin on change orders. It works exactly once with a given client, and it’s how GCs earn a bad reputation fast
• Skipping the bid expiration date and eating a material price swing on a bid you submitted two months before the client actually signed
• Quoting the same overhead percentage on every job regardless of size or complexity. A small, tight-site custom build often deserves a higher overhead percentage than a large, straightforward one, since your supervision time doesn’t scale down proportionally with square footage

Winning the Job Without Racing to the Bottom

The lowest number doesn’t always win, and it shouldn’t be your only lever. A clean, detailed, line-item bid signals to a client that you know exactly what you’re building and what it costs, the same way a lender wants to see a detailed estimate before releasing a construction loan. If you’re bidding jobs off a rough spreadsheet or a gut-feel number, the Residential Construction Estimating System breaks every trade category out the way a serious bid document should look, so your proposal reads like it came from someone who’s done this before, because you have.

How is bidding a new home build different from bidding a remodel?

A new build starts from a complete, known scope defined by stamped plans, with fewer hidden-condition surprises than a remodel. What it adds is more trades, more phases, and typically a payment structure tied to the client’s construction loan and its draw inspections.

What should I include in a bid for a residential construction job?

A clear scope of work, every allowance listed by name and amount, a proposed payment or draw schedule, explicit exclusions, a bid validity window, and proof of license and insurance.

Should I bid fixed-price or cost-plus?

It depends on how confident you are in your scope and allowances. Fixed-price puts the risk of anything you missed on you, while cost-plus shifts that risk to the client in exchange for full transparency on your fee structure. Decide the structure before you build the number.

How do I price overhead and profit into a construction bid?

State it as an explicit percentage line item rather than folding it invisibly into your other numbers. This makes it defensible if a client questions your price and keeps you from accidentally underpricing your own time and risk.

What’s the biggest mistake small GCs make when bidding jobs?

Underpricing to win the job and planning to recover margin through change orders. It damages trust with the client and rarely works more than once before your reputation catches up to you.

How long should my bid stay valid?

30 to 60 days is typical. An open-ended bid with no expiration date is a bid you might be stuck honoring at a loss if material prices move before the client signs.

Bidding a residential construction job is its own skill, separate from the skill of actually building the house. Price it line by line, structure it clearly, and put a shelf life on the number, and you’ll win jobs on the strength of your documentation, not just your price. The GCs who last in this business aren’t the ones who bid the lowest. They’re the ones whose bids hold up once the job actually starts.