5 Mistakes to Avoid in Home Renovation Projects
Every homeowner I meet has a renovation horror story. A contractor who disappeared after the deposit. A kitchen that took six months instead of six weeks. A bathroom that looked great in the showroom and nothing like that in real life.
Most of these stories share the same five mistakes. Here's how to avoid them.
1. Hiring on Price Alone
The lowest bid is almost never the best deal.
A contractor who quotes $15,000 for a job everyone else quoted at $25,000 is telling you something. Maybe they're cutting corners on materials. Maybe they're planning to hit you with change orders once the walls are open. Maybe they've never actually done this type of project before.
Get three quotes. If one is dramatically lower, ask why — in detail. "I run a lean operation" is not an answer. Line items are.
2. Skipping the Permit
I know. Permits feel like bureaucracy designed specifically to slow down your project and cost you money. Sometimes they are.
But unpermitted work follows the house. When you sell, the buyer's inspector finds it. The unpermitted square footage disappears from your appraisal. You either tear out finished work for a retroactive inspection or drop your price. The permit that cost $800 suddenly costs you $15,000.
In Montgomery County, most renovation work that goes beyond painting requires a permit. Frame walls, touch electrical, add plumbing — you need one. I pull permits on every project. It's not optional.
3. Changing Your Mind Mid-Project
You picked the tile. We ordered the tile. Demo started Monday.
Then you saw something on Instagram.
Design changes mid-project are the single biggest cause of budget overruns and schedule blowouts. Not bad contractors. Not surprise conditions behind walls. Homeowners who change the plan after work has started.
Spend the extra time upfront. Look at samples in your actual space, under your actual lighting. Sleep on the decision. Change your mind before we order materials, not after.
4. Underestimating What's Behind the Walls
Old houses hide things. Knob-and-tube wiring from 1940. Cast iron pipes that have been quietly rusting since Reagan was president. Mold behind a shower that looked perfectly fine from the outside.
A good contractor tells you this upfront and builds a contingency into the budget — typically 10 to 15 percent for older homes. If your contractor gives you a quote with zero contingency and zero mention of potential surprises, they're either inexperienced or they're planning to call you with bad news once demo is done.
Ask before you sign: what happens if we find something unexpected? The answer tells you everything.
5. Not Getting It in Writing
Verbal agreements feel fine when everyone is excited about the project. They feel less fine six weeks in when you and your contractor remember the conversation differently.
A real contract covers scope, materials (by brand and model number, not just "tile"), payment schedule, timeline, what happens if there are delays, and how changes get priced. If a contractor resists putting details in writing, that's your answer.
The contract protects both of you. A contractor who won't sign one is a contractor who expects things to go sideways.
Renovation projects go wrong in predictable ways. The homeowners who avoid these five mistakes don't have better luck — they ask better questions before the project starts.
Planning a Renovation in the DMV?
I give detailed, line-item quotes, pull every permit, and put it all in writing before a single wall comes down. Call or text me at (240) 387-8186 for a free estimate.
Serhii Kudelkin is the owner of Build Dog Construction LLC (MHIC #157062), a licensed general contractor serving Bethesda, Potomac, Rockville, McLean, and the broader DMV area.