Most renovation regrets don’t come from bad taste. They don’t come from choosing the wrong tile or picking the wrong paint color. They come from decisions made in the wrong order — or made in isolation, without the full picture in view.
After years of designing transitional cottage interiors and walking clients through renovations of every size and scope, I’ve seen the same five mistakes come up again and again. Not because the homeowners didn’t care, but because nobody told them what to watch for before they started.
Consider this that conversation. These are the renovation mistakes I see most often — and exactly how to avoid them before they cost you time, money, and the home you were trying to create.
Mistake One: Starting Demo Before the Design Is Finished
This is the biggest, most expensive renovation mistake I see — and it happens more often than you’d think.
There is an excitement that comes with finally deciding to renovate. The temptation to get started, to tear things out, to feel like progress is being made is completely understandable. But beginning demolition before a complete design plan is in place is where renovation regrets are born.
When walls come down before the design is finished, decisions get made under pressure — often by the contractor on site, not the homeowner. Plumbing ends up in the wrong place. Electrical doesn’t account for the lighting plan. The cabinetry layout hasn’t been fully resolved. And suddenly you’re making permanent decisions on the fly, in the middle of a construction zone, with a crew standing by waiting for answers.
What a finished design plan should include before demo begins:
- A complete layout
- Cabinetry elevations
- Plumbing and electrical locations
- A full lighting plan
- All finish selections
- Tile layouts
Every decision made on paper before a single wall comes down. This matters not just for the outcome — but for the budget. Change orders mid-project are where renovation budgets quietly double. A complete, thoughtful plan upfront is the single most effective way to protect both your timeline and your investment.
Design first, demo second. Always — without exception.
Mistake Two: Choosing Trendy Finishes for Permanent Elements
Trends belong in the layers you can change. Not in the things that stay for twenty years.
This is one of the most common renovation errors I encounter, and one of the most painful to watch — because by the time a homeowner realizes it, the tile is already set and the cabinetry is already installed.
Permanent elements — tile, cabinetry, countertops, plumbing fixtures, flooring, millwork — should be chosen for timelessness, proportion, and material quality. Not for what’s trending on Pinterest right now. Not for what every new build in your neighborhood is doing this year. These are the bones of your home, and they deserve decisions that will still feel right a decade and a half from now.
A test I give every client: Would this finish still feel beautiful and resolved in fifteen years? If the answer is “probably not,” it belongs in the layers — a pillow, a piece of art, an accessory. Somewhere you can swap it when the moment passes.
The materials that consistently pass this test are the ones I return to again and again in my own work: honed marble and natural quartzite countertops, unlacquered brass and polished nickel hardware, white oak, hand-glazed ceramic tile, classic subway and diamond patterns. These materials earn their cost because they age beautifully — they develop character and patina rather than looking dated.
Intentional renovation planning means making permanent decisions with a long view. Trends are a wonderful thing — just let them live where they belong.
Choose permanent elements for timelessness and material quality — save the trends for the layers you can change.
Mistake Three: Treating Lighting as an Afterthought
If there is one designer renovation tip I could hand to every homeowner before they started, it would be this: take your lighting seriously from the very beginning.
Most homes are dramatically under-lit. And the ones that aren’t under-lit are often over-reliant on recessed ceiling cans — which, on their own, are the fastest way to make a beautifully finished room feel flat and impersonal. Recessed lighting has its place, but it was never meant to carry the whole room.
Every room needs layered lighting — and it needs to be planned during the design phase, not selected at the end when the budget is stretched and the walls are already closed. Switch placement, dimmer zones, and junction box locations all have to be determined before drywall goes up. Once they’re in, changing them is a significant undertaking.
The three layers every room needs:
- Ambient lighting — general illumination, your chandelier, your semi-flush mount, your recessed cans used sparingly
- Task lighting — focused light where you work, cook, or read; under-cabinet lighting in a kitchen, a reading lamp beside a chair
- Accent lighting — the layer most people skip entirely. Sconces, picture lights on art, library lights on built-ins, table lamps. This is the layer that creates warmth, intimacy, and the glow that makes a room feel like home rather than a showroom
A well-lit room with modest finishes will always feel more beautiful than a perfectly finished room that is poorly lit. Light is that powerful.
Plan your lighting during the design phase — layered, intentional, and never dependent on overhead cans alone.
Mistake Four: Getting Scale and Proportion Wrong
This is the mistake that most people can feel but can’t name. A room that seems to have all the right elements but still feels somehow off — unresolved, slightly uncomfortable, not quite right. Nine times out of ten, the culprit is scale and proportion.
Proportion is what makes a room feel intentional. It’s also what’s most often missed when plans are made without a designer’s eye on the full composition.
The most common offenders I see:
- Pendants over an island hung too small or too high — as a general rule, island pendants grouped together should fill roughly two-thirds of the island length
- Rugs that float rather than ground the furniture — your rug should sit under at least the front legs of all main seating pieces
- Range hoods that look slight next to the range below — the hood should match or exceed the visual weight of the range, not disappear above it
- Vanity mirrors sized to the wall rather than the vanity — the mirror should relate to the width of the vanity beneath it, not the full wall width
These details seem small in isolation. Together, they are the difference between a room that feels resolved and one that feels perpetually unfinished — even after the renovation is complete. Avoiding renovation mistakes like these comes down to slowing down and considering the full composition before anything is ordered or installed.
Proportion is invisible when it’s right and impossible to ignore when it’s wrong — take the time to get it right before anything is ordered.
Mistake Five: Skipping Millwork and Architectural Detail
A renovation can include all the right finishes — beautiful stone, considered cabinetry, layered lighting — and still feel flat if the architecture itself is forgettable.
Builder-grade trim, hollow-core doors, and bare drywall ceilings are where personality goes to die. And yet millwork and architectural detail are consistently the first things cut when renovation budgets get tight — which means they’re also consistently one of the biggest renovation regrets I hear from clients who wish they’d prioritized differently.
Millwork is one of the highest-impact, longest-lasting investments you can make in a renovation. Paneled walls, picture frame moulding, beefed-up baseboards, beadboard ceilings, custom built-ins, solid interior doors with quality hardware — these are the details that make a new build feel like it has always been there, or a tired older home feel like it was always meant to look this way.
This is especially true for a transitional cottage home, where the architectural bones are as important as any finish selection. The millwork is what gives the home its soul — its sense of age, craft, and permanence. It’s what separates a house that was renovated from a home that was truly designed.
My timeless renovation tip here is simple: don’t spend the entire budget on the kitchen and forget the bones of the rest of the house. A beautifully detailed hallway, a paneled dining room wall, a beadboard ceiling in a bathroom — these moments are what guests notice and what families remember.
Millwork and architectural detail are where a home gets its character — don’t let budget pressure talk you out of the details that matter most.
What It All Comes Down To
Every one of these renovation mistakes shares something in common: they come from rushing, or from working in isolation without the full picture in view.
Renovations work best — and renovation regrets are rarest — when the whole plan is considered together, in the right order, with a thoughtful eye on proportion, longevity, and the life that will actually be lived inside the finished space. That’s what intentional renovation planning looks like in practice. Not just beautiful selections made in isolation, but a cohesive vision executed in the right sequence, with every decision serving the whole.
Whether you’re renovating a kitchen in Kansas or a cottage anywhere in the country, these principles hold. Good design isn’t regional — but having a designer who understands your home, your family, and your vision makes every one of these decisions easier, more intentional, and more enduring.
That’s how you get a home that ages beautifully instead of one that needs to be redone in seven years.
Thinking about a renovation and want to avoid these mistakes from the start? Browse my LTK for the timeless finishes and materials I return to again and again — and if you’re ready to work through your renovation with a designer who will get every detail right, I’d love to hear about your project.
