If you’ve spent any time researching what to do with an older home, you’ve probably seen these words used interchangeably: preservation, restoration, renovation, rehabilitation. They’re not the same thing. The approach you choose shapes every decision that follows — who you hire, what you keep, what you change, and how much it costs.

Here’s how to tell them apart.

Historic Preservation

Preservation is the most protective stance you can take with a historic property. The goal is to maintain what exists — original materials, original finishes, original form — with as little intervention as possible. Repair rather than replace. Stabilize rather than improve.

In practice, preservation is often legally defined. If your home sits within a historic district or carries a landmark designation, certain changes require approval, and some are off the table entirely. Denver has several locally designated historic districts — Potter-Lawson, Curtis Park, and Country Club among them — where exterior alterations go through a review process before a permit is issued.

Even without a legal designation, preservation is the right framework when a property has significant architectural or cultural integrity that would be diminished by change. The question isn’t can we update this — it’s should we.

Historic Restoration

Restoration takes a specific moment in time as its target. The goal is to return a property to how it looked and functioned during its most historically significant period — which often means removing things that later owners added and aren’t original to the house.

That drop ceiling in the dining room. The aluminum siding someone installed in the 1970s. The replacement windows that don’t match the profile of the originals. Restoration work pulls those layers back and works from what’s underneath.

This is exacting work. It requires research — historic photographs, Sanborn fire maps, paint analysis, original permit records — to establish what “original” actually looked like. It’s also the approach most likely to involve period-appropriate materials and craft techniques that aren’t easy to source.

Restoration makes the most sense when a home’s historic integrity is largely intact and the goal is to recover what’s there, not reimagine it.

Historic Renovation

This is where most of Studio Olio’s work lives.

Historic renovation keeps the character of an old house — its proportions, its architectural logic, its materials — while updating it to function well for the people who live in it now. New systems. Code-compliant electrical. A kitchen that works. A bathroom that doesn’t require a history degree to operate.

The discipline is in knowing what to touch and what to leave alone. Original millwork, old-growth fir floors, plaster walls with good bones, built-ins that have survived a hundred years of use — those stay. A non-original partition wall, a bathroom addition from the 1960s with no relationship to the rest of the house, a layout that makes the home genuinely hard to live in — those are candidates for change.

Studio Olio is currently working in Curtis Park — one of Denver’s oldest intact neighborhoods — where nearly every block has a home worth getting right.

Historic renovation is not about making an old house look old. It’s about making an old house work — without erasing the reason it was worth keeping.

Rehab (Without the Historic Consideration)

Rehab, in the conventional sense, means bringing a property up to livable or marketable condition. There’s nothing wrong with that goal. But when it’s applied to historic homes without any regard for what made them worth saving, the results tend to be the same everywhere: original details stripped out, surfaces covered in materials that have no relationship to the house’s era or character, front porches enclosed to add square footage.

The house still stands. But the thing that made it irreplaceable is gone.

Denver loses historic fabric this way more often than it should. It’s usually not malicious — it’s a cost calculation made without full information about what was there or what it was worth.

Which Approach Is Right for Your Home?

The answer depends on your home’s condition, its designation status, your goals for the space, and — honestly — how much of its original character is still intact. Most historic homes in Denver that haven’t been landmarked sit somewhere in the renovation category: enough original fabric to be worth protecting, enough that needs updating to require real decisions.

That’s exactly the kind of project Studio Olio was built for. If your home was built before 1960 and you’re trying to figure out what to keep and what to change, that’s where we start.

→ Learn more about how Studio Olio approaches historic home renovation in Denver

Watch

Want to go deeper? Lora covered this topic on the Meaningful Design podcast — watch the episode below.