The Design-Build Contract, Change Orders & Scheduling Trades in Occupied Homes

Welcome

Hello, and welcome. This is Super Structures General Contractors — a national general contractor headquartered in Powhatan, Virginia — here to help you and your clients build something that lasts. We're glad you're with us, and we look forward to connecting with you.

Alright, The Design-Build Contract, Change Orders & Scheduling Trades in Occupied Homes. Don't let the plain title fool you. Here's the part that actually matters on the job: Run the remodel on paper before you run it in the house — a two-stage design-build agreement, allowances that get reconciled, change orders signed before the work, and a trade schedule that puts one crew in a room at a time. Learn it well and you'll finish on the date you promised with the margin you priced.

The intro course covered why allowances, contingency, and change orders matter. This lesson is the mechanics: what the two agreements say, how an allowance is written so it cannot be misread, how a change order moves from the first "while you're here" to a signature, and how trades get scheduled inside a kitchen with a family eating dinner in the next room.

The two-stage design-build agreement

Stage one is a design and preconstruction agreement: a fee for measured existing-conditions drawings, the investigation phase, design development, selections assistance, engineering coordination, and a fixed construction price. State whether the fee is credited toward construction and who owns the drawings if the client walks. Stage two is the construction agreement, which should contain:

• Scope by reference — the dated drawings, specifications, and signed selection sheets, so "the kitchen" means a defined list.
• Price and payment schedule — a deposit within any state limit, progress payments tied to visible milestones (demo complete, rough inspections passed, drywall complete, cabinets set, substantial completion), and final payment at completion of the punch list.
• Allowances and exclusions, each stated.
• Schedule — start date, substantial completion date, and what extends them (change orders, concealed conditions, client decisions past deadline, weather on exterior work).
• Concealed conditions and change order clauses.
• Warranty — term, what it covers, and that manufacturer warranties pass through.
• Required consumer disclosures — many states dictate contract contents, deposit caps, and lien notices for home improvement work, and the FTC Cooling-Off Rule gives a three-day cancellation right on many contracts signed in the home.
• Insurance, dispute resolution, and termination. Standard residential forms from the AIA and from builder associations exist; have your attorney adapt one to your state.

Writing an allowance that cannot be misread

A good allowance line reads like a specification: the item, the quantity basis, whether it is material only or installed, whether tax, delivery, and waste are included, and how it is reconciled. "Tile allowance: 180 square feet of field tile, material only, delivered, including tax and 10 percent waste; labor is priced separately for 12-by-24 porcelain in a straight lay; mosaics, natural stone, or patterns are priced by change order." Reconcile every allowance in writing when the selection is made, not at the final invoice, and set realistic numbers for the client's taste; a lowball allowance is a deferred argument.

Change orders, start to signature

Changes come from four places: the client's wishes, concealed conditions, code or inspector requirements, and design gaps. The process is the same for all:

• Identify and stop — if the change affects work in progress, pause that work rather than build something that may be undone.
• Price it fully — labor at your loaded rate, materials, subcontractor quotes, dumpster and protection, supervision time, markup, and the schedule impact in working days.
• Write it — description, price, days added, and the new contract total.
• Sign before the work — the client's signature, by hand or electronically. For true emergencies, a time-and-materials change with a not-to-exceed amount, approved by text and formalized within a day.
• Log it — a running change order log with totals, shared with the client, so the final invoice has no surprises. A verbal "go ahead" is a gift you gave the client, not a change order.

Scheduling trades in a tight occupied space

A remodel schedule is a lookahead, revised weekly:

• One trade per room — stacking a plumber, an electrician, and a drywall hanger in a 10-by-12 bath costs more than it saves. The exception is a planned share with assigned walls.
• Deliveries just in time — there is no warehouse; cabinets arrive the day before they are set, and the garage or a jobsite trailer is the staging area, agreed with the client.
• Long-lead first — custom cabinets, windows, and special-order fixtures set the critical path; order them the day the construction agreement is signed and track confirmed ship dates weekly.
• Inspection windows — book the inspection when the trade commits a finish date, with a day of float.
• Countertop gap — plan the one to two weeks between template and install with work that does not need the tops: tile backsplash prep, trim, paint, lighting.
• Client decision deadlines on the schedule as line items, with the consequence stated.
• Hours and noise — demolition and tile saws in the agreed window; quiet work at the edges of the day. Hold a short daily check-in with the lead and the trades on site, and a weekly meeting with the client that covers progress, the next two weeks, decisions due, and open change orders.

Going Deeper (Intermediate)

Cash flow is the remodeler's quiet risk. The payment schedule should keep you slightly ahead of cost, deposits should cover the long-lead deposits you must place, and subcontractor and supplier lien waivers should accompany each draw where your state uses them. A contract that pays you when the client "is happy" is a contract that pays you late.

Advanced / Pro-Level

Pros build the schedule with buffers at the handoffs, not at the end. A day between the rough inspection and insulation, two days between drywall finish and cabinets for prime and dust to settle, and a week before the client's "must be done by" date absorb the normal friction of an existing house. They also run a weekly production meeting across all jobs so a failed inspection on one house does not strand a tile crew on another.

The change order log is also a management tool: a job with twenty client changes tells you the design phase was rushed, and a job with ten concealed-condition changes tells you the investigation was thin. Review both at closeout and fix the phase that produced them.

Practice Challenge

Two weeks before cabinets arrive, the client asks to add a pot filler at the range and to upgrade the tile from the allowance to a handmade mosaic. The plumbing wall is already closed and inspected. What do you do? (Answer: price both as written change orders before any work — the pot filler needs the wall reopened, a new supply run, a plumbing permit revision and reinspection, drywall patching, and days added, and the tile upgrade reconciles the material allowance plus a separate labor change for mosaic installation — present the costs and schedule impact, get signatures, log them, and only then release the plumber.)

In Practice

A remodeler who signs a two-stage agreement, writes allowances like specifications, and keeps a change order log finishes with a client who knew every number before it hit the invoice. One who works from a one-page proposal and a handshake finishes with the same kitchen, a smaller margin, and a dispute over what "allowance" meant.

Common Mistakes to Avoid

• One contract that mixes design and construction with no decision point between them
• Allowances that do not say material-only versus installed, or how they reconcile
• Doing client-requested extras on a verbal yes and pricing them later
• Stacking trades in a small room to "make up time"
• Ordering long-lead items after demo instead of at contract signing

Takeaway: Run the remodel on paper before you run it in the house — a two-stage design-build agreement, allowances that get reconciled, change orders signed before the work, and a trade schedule that puts one crew in a room at a time.

Educational content only — not structural design, engineering, legal, or safety advice, and not a substitute for hands-on training under a licensed contractor or the judgment of a licensed design professional. Lead, asbestos, and mold work must be performed by certified or licensed firms under federal, state, and local rules. Follow the IRC, IEBC, NEC, and plumbing and mechanical codes as adopted and amended in your jurisdiction, OSHA 29 CFR 1926, the manufacturer's installation instructions, and your company's procedures.