How to price remodeling jobs from a written scope, phase by phase

A remodeling estimate is a promise about work you can't fully see. The walls are closed, the homeowner hasn't picked tile, the inspector's calendar is unknown, and the plumber's quote shows up next week. Contractors who price by the square foot, or from a gut number for a typical bathroom, find out on the job which of those unknowns they forgot. The fix is a written scope priced line by line: crew hours by phase, subcontractor quotes, materials with waste, allowances, the costs that grow with the calendar, and a margin applied the same way every time. Cost per hour and margin are covered in how to price service jobs, which applies to every trade; this guide is about bathrooms, kitchens, basements and other interior remodels.

What drives a remodeling price?

The scope does. Every line in it has its own unit: square feet of tile and drywall, linear feet of cabinets and trim, sheets of backer board, each fixture, each new circuit, each window. Write the scope room by room, stating what comes out, what goes in and who supplies it. Then price each line from that list.

Floor area is a sanity check, nothing more. Two bathrooms of the same size can differ by a tiled shower pan, a tiled ceiling, a relocated drain and an exhaust fan vented through the roof. A per-foot price hides every one of those decisions, and you pay for the ones it missed. When a homeowner asks for a ballpark at the first meeting, give a range drawn from your own past jobs of similar scope, say clearly that it is not a quote, and move to a written estimate.

How do you estimate labor by phase?

Break the job into the phases your crew actually works in, and estimate hours for each from your own records:

1. Protection and demolition
2. Framing, blocking and rough prep
3. Rough plumbing, electrical and mechanical by subs, then the inspection
4. Insulation, drywall or backer board, and waterproofing
5. Tile, flooring and finish carpentry
6. Cabinets, counters, fixtures and trim-out
7. Paint, punch list and final cleaning

Then add supervision, a line that often goes missing from remodeling estimates. Somebody walks the job with the inspector, meets the countertop templater, answers the homeowner's questions, orders the next delivery and checks each sub's work. Those hours are real, and they grow with the length of the job. Estimate them as hours rather than tucking a vague percentage into overhead.

Log actual hours by phase on every job. After a handful of bathrooms you will know your tile hours for your usual layouts, your demolition hours for a cast iron tub versus a fiberglass unit, and how long punch lists really run. That log is your estimating database, and a job costing habit turns it into numbers you can trust on the next bid.

Costs that grow with the calendar

Some remodeling costs depend on how long the job lasts, not on how much work it holds: dumpster rental, dust and floor protection that has to be maintained, daily cleanup, the drive to the site every working day, supervision, and the overhead your company carries every week a crew is tied up. A job that stretches because cabinets arrived late or an inspection slipped costs more to deliver even when the work itself didn't change.

Estimate duration on purpose. Lay the phases out on a calendar with sub and inspection dates, count the working days, and price the duration-driven lines from that count. Then manage the job to it. Special-order cabinets, tile and fixtures can carry long lead times, so confirm each one with the supplier before you set a start date, and write into the contract what happens when a late selection by the homeowner delays the work.

Travel belongs in the same bucket. A remodel means a trip to the site on every working day, plus runs to the supply house. A project far from your shop adds drive time to every one of those days. Price that extra drive into the hours, or keep your service area tight enough that it doesn't matter. Stacking projects in the same part of town also lets one supervisor cover two sites in a day.

Subcontractors, materials and allowances

Subcontractor quotes. Send each sub the same written scope the homeowner will sign, and get their quote in writing. Their price is a direct cost to you, the same as materials, and your margin applies to it. You schedule them, coordinate them, answer to the homeowner for their work and come back when it fails. Treat a sub's quote as a cost to be priced, never as a pass-through.

Materials. Take quantities off the scope, add waste for cuts and breakage, and include the time to pick up, store and return items. A tile layout with many cuts, a pattern or large-format tile needs more waste than a simple grid. Damaged or wrong deliveries cost hours too; build a little of that time into the phase that receives the material.

Allowances. When the homeowner hasn't chosen finishes, carry an allowance: a stated dollar amount for the vanity, the tile or the light fixtures. Write down what it includes (product only, or product and installation) and the rule when the final pick costs more or less. Price overages with the same margin as the rest of the job, and say so in the contract before anyone falls in love with a faucet.

Markup or margin. Plenty of remodelers think in markup on cost, while the job price calculator works in margin on price. The same dollars give two different percentages. A 30% markup on cost works out to about a 23% margin on price, so a contractor who needs a 30% margin and adds a 30% markup comes up short on every job. Choose one, use it on every line, and price change orders the same way.

Lead paint, asbestos and other old-house costs

Remodels disturb old materials, and the rules around them add real hours and supplies.

Lead-safe work. Under the EPA's lead Renovation, Repair and Painting program, anyone paid to disturb painted surfaces in a home or child-occupied facility built before 1978 needs lead-safe certification, and EPA has authorized some states and tribes to run their own programs. The work practice rules at 40 CFR 745.85 include warning signs; removing or covering objects in the work area; closing and covering ducts with taped plastic; covering the floor with taped-down plastic sheeting at least 6 feet beyond the surfaces being worked on; a ban on open-flame burning or torching of painted surfaces; a ban on sanding, grinding, power planing and other high-speed paint removal unless the machine has a shroud or containment and a HEPA vacuum attachment; HEPA vacuuming and wet cleaning; and a cleaning verification step at the end. The exclusion for minor repair and maintenance in 40 CFR 745.83 stops at 6 square feet per room of painted surface disturbed indoors (20 square feet on the exterior) and never applies to window replacement or demolition of painted surface areas, so a remodel that tears out painted walls or trim in an older home will usually fall under the rule.

In the estimate, that means hours to set up and take down containment, plastic and tape, HEPA vacuum time, wet cleaning, the verification step and slower demolition. Put them on their own lines so the homeowner can see why the older house costs more.

Asbestos. The EPA suggests homeowners planning a remodel consider having the home inspected by a trained and accredited asbestos professional, says that removal belongs with people trained and qualified to handle asbestos, and advises against taking samples yourself. Asbestos flooring and its backing, and pipe, furnace and boiler insulation, are among the materials the page discusses. When the scope includes demolition of suspect materials, price professional testing first, then carry any abatement on its own line or as a quote from an abatement contractor.

Silica. Cutting tile, stone and concrete puts fine silica dust in the air. For stationary masonry saws, the control listed in the silica standard OSHA wrote for construction (29 CFR 1926.1153) is a saw whose built-in water delivery keeps the blade wet the whole time it cuts. A proper wet saw and a cutting station outside the living space are a cost of every tile job.

Use these paragraphs to build the estimate. They are general information, not legal advice, so check the specifics with your state, particularly if it runs its own lead program.

Worked example: a hall bathroom

All figures here are hypothetical, invented to show how the lines add up: the hours, wage, overhead, sub quotes, material costs, allowance and margin. They are not market prices or benchmarks. Use your own scope, logs and quotes. The example home was built after the RRP rule's cutoff year, so no lead-safe lines appear; for an older home, add them.

Look at how much of the price isn't tile and fixtures. Supervision is a full line of hours. The subs are a large share of cost and still carry the job's margin. And the change order at the bottom uses the same formula as the contract, so the homeowner gets the same deal on extra work that they got on the original scope, and you keep the same margin on it.

Change orders and hidden conditions

Unwritten changes are where remodeling margins disappear. Set the rule in the contract and hold to it: every change is requested in writing, priced before the work, and signed before it starts. Price it with the same hours, materials, overhead and margin as the original job, plus the time to write it up and reorder anything it affects. Small changes aren't free because they're small. A request that stops the crew for an hour costs an hour.

For conditions you can't see until demolition, such as rotted subfloor, a damaged joist or old wiring that won't pass inspection, write unit prices into the contract: a price per sheet of subfloor replaced, per joist sistered, per circuit replaced. Photograph what you find and get a signature before fixing it. A general contingency line is the alternative, but unit prices are easier for homeowners to understand and much harder to argue about.

Site visits, photos and paid design

Remodeling estimates need a site visit. Photos and a short video call help at first contact: you see the room, hear the homeowner's goals and decide whether the project fits your crew and their budget before you drive out. Ask for photos of each wall, the ceiling, the floor, the electrical panel and the water heater, and ask what year the home was built, since that answer decides whether lead-safe lines belong in the estimate.

A detailed estimate takes hours: measuring, scoping, calling subs, pricing materials, writing it up. Those hours are overhead on every job you win and lost time on every one you don't. Some remodelers charge a design or estimating fee on larger projects and credit it toward the contract if the homeowner signs. Whatever you decide, track how many estimating hours each signed job took, and use that number to decide which leads get a full estimate and which get a ballpark first. Once a full estimate is out, keep in touch while the homeowner decides; our guide to following up on quotes lays out a schedule.

Deposits, payments and the cooling-off window

Long jobs need a payment schedule tied to milestones, so you never carry the whole project on your own cash. Tie payments to points the homeowner can see: signing, rough-in inspection passed, cabinets set, substantial completion. Check whether your state limits deposits on home improvement contracts before you set the first payment.

Timing matters when the contract gets signed at the kitchen table. Under the FTC's Cooling-Off Rule, many contracts signed in a buyer's home can be cancelled through the end of the third business day (midnight), and the seller must hand over a copy of the contract plus two copies of a cancellation form. If the buyer cancels, the FTC says the seller has ten days to return any check the buyer signed and refund the money. Ordering custom cabinets before that window closes puts the cost of a cancellation on you. The FTC notes that some state laws give buyers more rights than its rule, so check your state's home improvement contract requirements as well. This is a general summary; a lawyer should review your contract before you use it.

Repeat clients in a one-time trade

Each remodel is a one-time job, but the household isn't. A homeowner whose bathroom went well still has a kitchen, a basement and friends. Keep the full job record: scope, selections, paint colors, photos and the subs you used. Follow up after completion on a schedule, first with a warranty check-in and later with the next room.

Small requests after the project (a grab bar, a vanity light, a touch-up) are easy to give away. Price them at your minimum, which covers a trip, setup and your margin. Landlords and property managers who need unit turns can be steady work at a set price per unit type; build that price from your logged turn hours rather than their target number.

Warranty, punch lists and callbacks

A punch list is a phase, not an afterthought. Estimate its hours from past jobs and include them, as the example does. Warranty work comes later: a grout joint that cracks, a door that rubs after the first heating season, a leak at a sub's connection. Track every return visit by cause, total the cost each year and divide it by the number of projects. Carry that figure as a warranty reserve on every job. When one sub or one detail keeps bringing you back, deal with that sub or change that detail; a bigger reserve only pays for the problem.

Remodeling pricing mistakes

• Square-foot pricing. It hides the decisions that drive cost.
• No supervision hours. Somebody runs the job, and that time costs money.
• Sub quotes passed through at cost. Coordination and warranty exposure deserve the job's margin.
• Allowances with no overage rule. Write down how overages and credits are priced.
• Duration left out. Dumpster days, protection and site trips grow when the job slips.
• Old-house costs folded into a guess. Lead-safe work, asbestos testing and abatement need their own lines.
• Free change orders. Every change gets a price and a signature first.
• Estimating hours ignored. Unpaid estimates are overhead. Track them and qualify leads before writing full estimates.

For how remodeling clients choose a contractor and what we build for this trade, see our remodeling industry page. New companies can find licensing, insurance and tool basics in the guide to starting a remodeling business. Flooring is often part of a remodel, and the flooring installation pricing guide covers it in detail. Use the hourly rate calculator to set the labor and overhead rates every estimate starts from. A custom CRM can keep scopes, change orders, sub quotes and actual hours on one job record, so the next estimate starts from real numbers. Our first build was for our own service companies.

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