Older homes are one of the things I love most about Denver real estate.

A 1920s bungalow in Platt Park. A classic Denver Square in Congress Park. A Tudor in Bonnie Brae. A Victorian in one of Denver's historic neighborhoods.

These homes can offer something that's difficult to recreate with new construction: original architecture, mature trees, established neighborhoods, craftsmanship, and character that's been around for generations.

But if you're thinking about buying an older home in Denver, Colorado, there's another side of the equation you need to understand.

What could this house actually cost you to own?

After more than 43 years living in Colorado and touring a LOT of Denver-area homes with buyers, I've learned that some of the biggest potential expenses aren't the things you'll notice when you first walk through the front door.

They're often hidden behind the walls, underneath the house, underground, or buried in an insurance quote.

So before you fall in love with the original hardwood floors and beautiful front porch, here are five things I think every buyer should investigate when purchasing an older Denver home.

Quick Answer: When buying an older home in Denver, pay particular attention to the electrical system, sewer line, foundation and soil conditions, historic or landmark restrictions, and homeowners insurance. These issues don't necessarily make an older house a bad purchase, but discovering them before closing can help you avoid potentially expensive surprises after the home becomes yours.

1. Older Electrical Systems Can Become an Expensive Surprise

One of the first major systems I'd want to understand when buying an older house in Denver is the electrical system.

A home that's 80, 100, or even 120 years old was obviously built for a very different world.

Think about how much electricity we use today:

• Central air conditioning
• Large refrigerators
• Dishwashers
• Microwaves
• Computers
• TVs
• Home offices
• EV chargers
• Hot tubs
• Modern kitchen appliances

The electrical demands of a modern household are dramatically different from when many of Denver's historic homes were originally constructed.

And while many older Denver homes have had their electrical systems updated over the years, you shouldn't automatically assume everything has been modernized.

What Electrical Issues Can Be Found in Older Denver Homes?

Depending on the age of the property and previous renovations, there may be older electrical components that deserve further evaluation.

One of the better-known examples is knob-and-tube wiring.

Knob-and-tube wiring was commonly used in older homes and may still exist in portions of some properties today.

There may also be questions involving the home's:

• Electrical panel
• Wiring
• Grounding
• Outlets
• GFCI protection
• Electrical capacity
• Previous DIY electrical work
• Electrical work associated with additions or basement renovations

The important point isn't to diagnose these issues yourself during a showing.

It's to recognize when you need more information.

Older Wiring Can Also Affect Homeowners Insurance

This is where an electrical issue can become more complicated.

It's not only:

“How much would this cost to update?”

You also want to know:

“Will my insurance company insure the house in its current condition?”

Depending on the property and insurance carrier, older electrical components may affect insurability, premiums, or requirements for coverage.

That's something I'd much rather discover during your inspection and due-diligence period than a few days before closing.

And if significant electrical modernization is necessary, the cost can potentially become a five-figure project, depending on the home and scope of work.

My advice for Denver home buyers:

If there are questions about the electrical panel or older wiring, consider getting a qualified electrician involved during your inspection period.

And contact your homeowners insurance professional early.

Don't wait until the end of the transaction.

2. Sewer Lines: What's Underground Can Matter Just as Much as What's Inside the House

This may be one of the easiest things for a buyer to forget.

You can spend an hour touring a beautiful Denver home and never see one of its most important—and potentially expensive—components.

The sewer line.

Many older Denver homes have sewer lines that have been underground for decades.

Depending on the age and property, you may encounter older sewer materials, including clay sewer lines.

Now combine that with something else Denver's established neighborhoods have plenty of:

Big, mature trees.

Beautiful?

Absolutely.

But tree roots and aging sewer lines aren't always the best combination.

What Can Go Wrong With an Older Sewer Line?

A sewer scope may reveal conditions such as:

• Root intrusion
• Cracks
• Separation
• Deterioration
• Blockages
• Low spots or "bellies"
• Damaged sections
• Other defects

Sometimes the solution may be relatively straightforward, such as cleaning the line and continuing to monitor it.

Other situations can require repair or replacement.

And that's when costs can increase quickly.

Depending on the location, accessibility, length, and extent of the problem, sewer repairs or replacement could potentially cost thousands or even tens of thousands of dollars.

That's not the kind of surprise you want immediately after moving in.

Should You Get a Sewer Scope When Buying an Older Home in Denver?

I'm a big believer in considering one.

A sewer scope uses a camera to inspect the sewer line from the house toward the municipal connection.

It's one of those inspections that can provide information you simply can't get by walking around the house.

The sinks might drain.

The toilets might flush.

Everything may appear perfectly normal.

That doesn't tell you what the pipe looks like underground.

For many older Denver-area homes, I want my buyers to at least consider having a professional sewer scope performed during the inspection period.

A relatively small amount spent investigating the sewer line before closing can potentially help you identify a much larger expense before it becomes yours.

3. Foundations and Colorado's Expansive Soil

Next up is one of my favorite Colorado real estate topics:

Our soil.

If you're moving to Denver from another part of the country, you may not realize how important soil conditions can be when evaluating a Colorado home.

Parts of Colorado have expansive soils, which can change volume as moisture conditions change.

Combine soil movement with a home that's been standing for 80, 100, or 120+ years, and seeing some evidence of movement or cracking isn't necessarily shocking.

The important question is:

What does it mean?

Are Foundation Cracks Normal in Older Denver Homes?

This is where context matters.

Not every crack means:

“The foundation is failing.”

Concrete cracks.

Homes settle and move.

Older homes have had decades to experience changing soil conditions, weather, moisture, renovations, and normal aging.

The challenge is distinguishing between:

“This is an old house being an old house.”

and

“We should probably get a structural engineer involved.”

That's not a distinction I want to guess at.

Foundation Warning Signs Buyers May Notice

During a home tour or inspection, things that could warrant a closer look may include:

• Significant foundation cracks
• Cracks that appear to have changed
• Previously repaired cracking
• Uneven floors
• Doors that don't close properly
• Separation around doors or windows
• Wall or ceiling cracking
• Evidence of water intrusion
• Basement moisture
• Exterior drainage issues
• Visible movement or displacement

None of these individually proves there's a major structural problem.

They are clues.

And clues tell us when it's time to ask more questions.

How Much Can Foundation Repair Cost in Denver?

This varies enormously depending on what's actually happening.

A relatively simple repair is very different from a property requiring substantial structural stabilization or foundation work.

Major repairs can potentially reach tens of thousands of dollars.

That's why I wouldn't try to diagnose a questionable foundation myself.

Get the appropriate professional involved before your inspection deadline.

The goal is to understand the issue—and the potential cost—while you still have options.

4. Buying a Historic Denver Home? You May Not Be Able to Change Everything You Want

This is one that can surprise buyers.

Some of Denver's most beautiful older homes are located within historic districts, and individual properties may also have historic or landmark protections.

That's part of what can make these neighborhoods so special.

Historic preservation can help maintain the architectural character that attracted you to the neighborhood in the first place.

But if you're buying a historic home in Denver, it's important to understand that your renovation plans may be subject to additional requirements.

What Changes Could Be Affected on a Historic Denver Home?

Depending on the property's specific status and applicable regulations, exterior projects involving things such as:

• Windows
• Doors
• Additions
• Roofs or roofing materials
• Porches
• Exterior materials
• Demolition
• Other significant exterior alterations

may require additional review or approval.

That can potentially mean additional rules, additional costs, and a longer renovation timeline.

So imagine finding a beautiful historic Denver house and thinking:

“This is perfect. We'll just replace all the windows and build an addition off the back.”

Maybe you can.

Maybe there are restrictions.

Find out before you buy—not after.

How Do I Know if a Denver Home Is in a Historic District?

This is something I'd investigate during the home-buying process if historic status could affect your plans for the property.

Don't assume that because neighboring homes have been remodeled, your exact project will automatically be approved.

And don't assume that an old house is automatically historically protected simply because it's old.

Those are two very different things.

The specific property matters.

If significant exterior renovations are part of your plan, understand the property's status and applicable requirements before making assumptions about what you can change.

5. Get Your Colorado Homeowners Insurance Quote EARLY

This has become an increasingly important part of buying a home in Colorado.

And with an older home, there can be additional factors for an insurance company to consider.

Your insurer isn't only thinking about:

“What did Adam's buyer pay for this house?”

They're also evaluating risk and what it could potentially cost to repair or rebuild the property.

That can become particularly interesting with older homes.

What Can Affect Insurance on an Older Denver Home?

Depending on the property and insurer, factors may include things such as:

• Roof age and condition
• Roofing materials
• Previous claims
• Electrical systems
• Plumbing
• Home age
• Replacement cost
• Unique architectural details
• Building materials
• Property condition
• Other underwriting considerations

Colorado weather adds another layer.

Hail and severe weather can make the roof and insurance conversation particularly important for Denver-area buyers.

That's why I don't like treating homeowners insurance as something you deal with a few days before closing.

When Should You Get a Homeowners Insurance Quote When Buying in Denver?

Early.

Once you're under contract and have the information your insurance professional needs, start investigating coverage and pricing.

You don't want to spend weeks going through:

• Inspections
• Appraisal
• Loan approval
• Negotiations
• Title work
• Closing preparation

only to discover an insurance issue that changes the financial equation.

The monthly mortgage payment is only one part of what it costs to own a home in Denver.

Taxes, insurance, maintenance, repairs, utilities, HOA fees when applicable, and future capital expenses all contribute to your actual cost of ownership.

Know as much of that number as possible before you close.

What Are the Biggest Expenses When Buying an Older Home in Denver?

There's no universal answer because two homes built in the same year can be in completely different condition.

One may have had decades of thoughtful maintenance and modernization.

The other may still have multiple original systems.

When I'm helping someone evaluate an older Denver home, some of the potentially expensive areas I'd want them to understand include:

• Electrical system
• Sewer line
• Foundation
• Roof
• Plumbing
• HVAC
• Drainage and moisture
• Windows
• Previous renovations
• Insurance
• Historic renovation requirements when applicable

Notice something?

The kitchen countertops aren't on that list.

That's intentional.

Cosmetic updates can certainly cost money, but when you're deciding whether a house is a good purchase, I want to understand the expensive things that aren't nearly as fun to look at on Zillow.

How Much Should You Budget for Repairs on an Older Denver Home?

I wouldn't use one blanket percentage for every property.

A beautifully maintained 1925 bungalow with updated electrical, plumbing, sewer, roof, HVAC, and windows is completely different from another 1925 bungalow where very little has changed.

Instead, I'd try to identify the home's major systems and their remaining useful life.

Ask questions such as:

• How old is the roof?
• How old is the furnace and air conditioner?
• Has the electrical system been updated?
• What type of plumbing is present?
• What does the sewer scope show?
• Are there foundation concerns?
• How is water managed around the property?
• What renovations have been completed?
• What major expenses could be approaching?
• What will homeowners insurance cost?

That allows you to build a much more realistic picture of what this particular Denver home could cost to own.

Should You Avoid Buying an Older Home in Denver?

Absolutely not.

In fact, some of my favorite homes in Denver are the ones that have already been standing for 80, 100, or even 120+ years.

You're often getting things that can be difficult—or incredibly expensive—to recreate today:

• Original architecture
• Mature landscaping
• Large trees
• Established neighborhoods
• Original hardwood floors
• Detailed millwork
• Front porches
• Unique floor plans
• Walkable locations
• Genuine character

And here's something else that's important:

Old doesn't automatically mean bad.

I've toured century-old Denver homes that have been meticulously maintained and thoughtfully updated.

I've also toured much newer homes with plenty of problems.

The year on the tax record is only the beginning of the conversation.

Condition matters. Maintenance matters. Updates matter. And how those updates were completed matters.

What Inspections Should You Consider When Buying an Older Denver Home?

Your specific inspection strategy should depend on the individual property.

But with an older Denver home, there are several areas I may want my buyers to investigate more closely.

Depending on what we find, that could include:

General home inspection: A broad evaluation of the home's major components and systems.

Sewer scope: Camera inspection of the sewer line.

Radon testing: Particularly important to understand in Colorado because radon can't be detected by sight or smell.

Roof evaluation: Helpful when roof age, hail damage, wear, or insurability are concerns.

Electrical evaluation: Particularly if older wiring, panels, or questionable previous work are identified.

Structural evaluation: When cracking, movement, foundation conditions, or other structural concerns warrant expert review.

HVAC evaluation: When the heating or cooling systems raise concerns.

Plumbing evaluation: When older materials, water pressure, drainage, or other plumbing issues deserve additional investigation.

Not every house needs every specialist.

The house tells us which questions we need to ask.

My Older Denver Home Inspection Checklist

When I'm helping a buyer evaluate an older home, I don't expect to personally diagnose all of its systems.

That's what qualified inspectors, contractors, engineers, electricians, plumbers, insurance professionals, and other specialists are for.

My role is to help my buyer recognize the questions that need answers and build a strategy for getting those answers before making a final decision.

For an older Denver property, there are a handful of calls or investigations I particularly don't want to overlook:

1. Electrician, if the electrical system raises questions.
2. Sewer scope, particularly with an older sewer line.
3. Structural professional, when appropriate.
4. Insurance professional, early in the transaction.
5. Historic/landmark research, if applicable to the property and the buyer's plans.

Those few steps could potentially prevent a five-figure surprise after closing.

Frequently Asked Questions About Buying an Older Home in Denver

Are older homes in Denver worth buying?

They certainly can be. Older Denver homes can offer architecture, mature landscaping, established neighborhoods, and character that's difficult to recreate. The key is understanding the property's condition, major systems, maintenance history, renovation quality, and potential future expenses before buying.

What should I look for when buying a 100-year-old house in Denver?

Pay particular attention to the electrical system, plumbing, sewer line, foundation, roof, drainage, basement moisture, HVAC, previous renovations, insurance, and any historic restrictions that could affect future improvements.

Should I get a sewer scope on an older Denver home?

I strongly encourage buyers to consider one, particularly with older properties. A sewer scope can identify conditions that aren't visible during a normal home showing or general inspection.

Is knob-and-tube wiring common in older Denver homes?

Knob-and-tube wiring may still exist in some older properties or portions of properties. If older wiring is identified or suspected, a qualified electrician and your homeowners insurance professional can help you understand its condition, potential costs, and insurance implications.

Are foundation cracks normal in older Denver houses?

Some cracking or movement doesn't automatically mean a home has a major structural problem. The type, location, severity, and surrounding conditions matter. If there are significant concerns, an appropriate structural professional can help determine what's happening.

Does Colorado soil cause foundation problems?

Some Colorado soils are expansive and can change volume with changes in moisture. Soil conditions are one of several factors that can affect a home's foundation, making drainage and structural evaluation important when concerns are present.

Are historic Denver homes harder to renovate?

They can be. If a property is individually landmarked or located within a historic district, certain exterior alterations may be subject to additional requirements or review. Research the specific property before assuming a planned renovation will be allowed.

Is homeowners insurance more expensive on older Denver homes?

It can be, but the answer depends on the individual property and insurance company. Factors such as roof condition, electrical and plumbing systems, replacement cost, prior claims, building materials, and other characteristics can affect coverage and pricing.

What are the most expensive problems in an older house?

Major structural problems, sewer replacement, electrical modernization, roofing, plumbing, HVAC, water intrusion, and other large-system repairs can potentially become significant expenses. The actual risks vary dramatically from one property to another.

Should I avoid a Denver home because it has one of these issues?

Not necessarily. An identified problem can sometimes become a negotiation issue rather than a deal breaker. The important thing is understanding the condition, repair options, approximate costs, your contract rights, and your comfort level before deciding how to proceed.

Don't Be Afraid of an Old House. Understand the House You're Buying.

That's really the lesson.

When people tour homes, it's natural to focus on what they can see.

The kitchen. The flooring. The bathroom. The backyard.

But when I'm touring an older Denver home with a buyer, I'm also thinking about what's behind the walls, underneath the floors, below the foundation, and underground.

Because choosing the right home isn't just about answering:

“Can I afford to buy this house?”

It's also:

“Can I comfortably afford to own this house?”

Those are two very different questions.

Buying an Older Home in Denver? Let's Build Your Strategy Before You Write an Offer.

I'm Adam Lang, a Denver-area Realtor®, Colorado native, Certified Real Estate Negotiation Expert, and creator of the Living in Denver YouTube channel.

After more than 43 years living in Colorado, I've had the opportunity to watch Denver's neighborhoods and housing stock change dramatically.

Today, I help buyers throughout the Denver metro understand not only which neighborhoods and homes fit their lifestyle, but also what questions they should be asking before they make one of the largest purchases of their lives.

If you're thinking about buying a home in Denver—especially a bungalow, Denver Square, Tudor, Victorian, mid-century ranch, or another older property—I offer a free 30-minute Denver Real Estate Strategy Session.

We can talk about your budget, timeline, neighborhoods, home styles, current Denver inventory, inspection strategy, and what you should be looking for before you ever write an offer.

The goal isn't to scare you away from Denver's older homes.

It's to help you buy one with your eyes wide open.