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A new Know Before You Hire series - Project Gotcha’s
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Expect the Unexpected in Contracting
Problems You May Not Be Considering
The Know Before You Hire Series
You've signed the contract, the permits are applied for, and your contractor is ready to break ground. Everything is lined up — so what could go wrong?
A lot, actually. After years of working in engineering, construction management, and real estate, I've seen the same surprises catch homeowners off guard over and over again. These aren't the big dramatic failures — they're the sneaky gotchas that blow your timeline, your budget, and your patience.
1. Material Delivery Delays — Especially Roof Trusses
Trusses can take 6 to 12 weeks to manufacture and deliver. They're custom-built for your project — there's no warehouse full of them waiting for you. I've seen framing crews finish walls, pack up, and move to another job while the homeowner waits months for trusses to arrive. When they finally show up, that crew may not be available for weeks.
What to do: Ask when long-lead materials are being ordered — ideally the moment permits are approved. Get the order confirmation and delivery window in writing.
When a contractor opens up walls, digs trenches, or modifies your home's structure, they will encounter your existing utility lines — sewer, water, gas, electrical, and low-voltage wiring like ethernet, security systems, and thermostat controls. I've seen sewer lines cracked during foundation work, water lines nicked by screws causing hidden leaks, electrical wiring cut and drywalled over, and low-voltage lines severed and abandoned because the contractor didn't consider them "their problem."
What to do: Insist on utility mapping before demolition begins. Photograph everything inside walls before they're closed up. After the project, test every system in the house — every faucet, outlet, and low-voltage device.
3. Permit and Inspection Delays
Homeowners assume the contractor handles permits seamlessly, but approvals can take weeks — sometimes months in busy municipalities. And if an inspection fails? Everything stops until corrections are made and the inspector returns, which could be another week or two. One failed rough-in inspection can cascade into weeks of delays.
What to do: Ask your contractor for a realistic permit timeline before work begins, and make sure inspections are scheduled proactively — not as an afterthought.
4. Scope Creep — "While We're In There"
The contractor opens a wall and finds knob-and-tube wiring, water damage, or undersized framing. Now you're facing an unplanned $5K–$15K addition. It's legitimate work that needs to happen, but nobody budgeted for it. This is the number one reason projects go over budget.
What to do: Always build a 15–20% contingency into your project budget. When surprises come up, get a written change order with the cost and timeline impact before approving the work.
5. Subcontractor Scheduling Conflicts
Your general contractor relies on electricians, plumbers, HVAC techs, and other subs. When one sub is late or no-shows, it creates a domino effect — drywall can't start until electrical passes inspection, the painter can't start until drywall is done, and suddenly you're three weeks behind because one plumber had a scheduling conflict.
What to do: Ask your contractor how they manage sub scheduling and what happens when someone doesn't show. A good GC has backup subs lined up. If they don't have an answer, that tells you something.
6. Landscaping and Exterior Damage
Heavy equipment, dumpsters, and material deliveries destroy your yard, driveway, and sometimes your neighbors' property. Contractors rarely include landscape restoration in their scope, so you're left with rutted grass, cracked driveway edges, and compacted soil where nothing will grow.
What to do: Photograph your yard and driveway before work starts. Include exterior restoration expectations in your contract, or budget separately for landscaping repairs after the project wraps.
7. Mismatched Finishes and Materials
Paint that doesn't match the rest of the house, flooring transitions that look like an afterthought, trim profiles that are slightly different, or tile grout that's a different shade. Contractors focus on structural and functional — the aesthetic details often get treated as "close enough." You won't notice until the project is done and the light hits it differently.
What to do: Specify exact product names, colors, and model numbers in your contract — not just "match existing." Buy extra of your current materials if they're still available, and do a visual walkthrough in daylight before final sign-off.
8. The Post-Project "Cleanup" That Isn't Really a Cleanup
Your contract says the contractor will clean up. They'll haul away scraps, sweep the floors, and run a shop vac. But they won't actually make your house livable again. Construction dust — especially drywall dust — gets into your HVAC system, coats the inside of every cabinet, and films over surfaces in rooms nowhere near the work area. I've had homeowners still finding dust six months later.
What to do: Budget $500–$1,500 for a professional deep cleaning. Replace your HVAC filters immediately after construction ends and again two weeks later. Really seal off the construction zone with plastic sheeting during the work if possible.
The Bottom Line
These gotchas are real, and most of them are preventable with the right planning. Ask the hard questions before work begins, build contingency into your budget and timeline, document everything, and don't sign off on completion until you've personally verified that your home is whole again.
Have a construction project gotcha of your own? Hit reply and share it — I'd love to feature reader stories in a future issue.
Want to go even deeper? Check out this past newsletter on hidden messages in contractor quotes!
The KnowYourHome author, Adam Rich, is a licensed Professional Engineer (P.E.) and Real Estate Salesperson in Ohio, with a background in engineering, construction management, property management, and real estate investing.
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I’m Adam Rich, a licensed Professional Engineer (P.E.) and Real Estate Salesperson in the state of Ohio. I help discerning homeowners like you take control of the complexity behind your home.
With a background in engineering, property management, construction, and real estate investing, I specialize in helping understand the systems that make your home work.
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The content of this newsletter is for informational purposes only and does not constitute professional advice. Always perform your own due diligence before making any financial decisions.