A contractor’s perspective on fixed prices and how to handle changes to work orders.
I was recently asked to provide a quote and then carry out a fairly small job: tidy a basement cosmetically, build a partition wall to create a new room, lay some flooring, and paint the garage floor. At the time I suspected this work might lead to additional tasks for the clients, but I had no idea how much more. Nine months later I was still working at the property. No, I don’t work slowly — and yes, I did complete the original brief.
Every morning I arrived to the homeowner greeting me with, “Good morning, I’ve been thinking about….” Eventually we both agreed there was no point in preparing fresh quotes every time the specification changed. Instead I charged a fixed daily rate for the work.
This experience made me think about how “organic” many renovation jobs become, and how that can put homeowners at risk when choosing a contractor. In this case the homeowners were fortunate — they had me. But I’ve seen other contractors respond very differently when a job evolves. Tasks that should take a single day can stretch into two or more, and the cost can balloon.
A clear word of warning to homeowners: when you change the scope of work mid-job, your contractor may accept the change but expect to be paid for the extra time. Unless you agree a fixed price for the additional work up front, those changes will typically be charged at an hourly rate, and the total quickly adds up. I’ve seen small extras accumulate to a sum greater than the original estimate.
The safest approach is to treat every change as a separate contract and request a written quote. Don’t simply accept an offhand or verbal price because the contractor is on site and can do the work immediately. A formal quote clarifies expectations, protects your budget, and prevents misunderstandings about time, materials, and costs.
Practical tips for homeowners when work expands beyond the original brief:
– Ask for a written change order or quote for each new task. Even a short email confirming price and scope helps.
– Decide whether you want the extra work done at a fixed price or charged by the hour. If you choose hourly, ask for an estimate of time and cost.
– Confirm who will supply materials for the additional work and whether their cost is included.
– Set clear priorities so you can defer nonessential extras if costs begin to climb.
– Keep a simple record of agreed changes, dates, and prices to avoid disputes later.
For contractors and tradespeople, consider these guidelines to preserve trust and maintain profitability:
– Communicate openly about scope changes and how they will be charged.
– Offer the client the choice between a firm quote for the extra work or time-and-materials billing with a realistic estimate.
– Put all agreed variations in writing, however small. This reduces confusion and keeps both parties aligned.
– Be transparent about potential knock-on effects: some changes can create additional work that isn’t obvious at first glance.
Renovation and repair work rarely follow a perfectly fixed plan. When projects evolve, clear agreements and written quotes protect both homeowners and contractors. Treat each change as a separate decision, agree the price up front, and keep communication open. That way, you avoid surprises, preserve good working relationships, and ensure the job finishes with everyone satisfied.