Home Inspection Red Flags in Older Ann Arbor Homes

Sept 13

Quick answer: Sewer scopes, electrical panel capacity, roof and HVAC age, and plumbing material are the four things that actually move the needle on an older Ann Arbor home. None of them should scare you off the purchase — they should shape your offer and your repair credit request.

A lot of what makes older Ann Arbor homes desirable — original construction, established landscaping, character you can't build new — comes paired with inspection items a 2020 build simply doesn't have. Here's the full picture of what to actually pay attention to.

Sewer scope

This is one is a non-negotiable on any Ann Arbor home.

Many established Ann Arbor neighborhoods have mature trees, and tree roots can find their way into older sewer lines through joints, cracks, and deteriorating sections of pipe. A sewer line can appear to be functioning normally while still having significant issues underground.

Another major concern in older homes is Orangeburg pipe.

Orangeburg is a type of sewer pipe made primarily from layers of wood pulp and pitch. It was commonly installed in the mid-1900s and was never intended to last indefinitely. Over time, Orangeburg can soften, deform, flatten, blister internally, or collapse.

If a sewer scope identifies Orangeburg, I would want my buyer to understand that this isn't simply about whether the line is flowing properly today. Orangeburg is an obsolete material that should be planned for replacement. The question becomes when replacement will be necessary and what it is likely to cost.

Depending on the location and length of the line, sewer replacement can become a significant expense.

A sewer scope is relatively inexpensive compared with discovering a failed sewer line after closing. Make sure the technician scopes the entire accessible line toward the city connection and identifies the pipe material whenever possible.

Electrical panel

Older Ann Arbor homes weren't designed around the electrical demands of a modern household.

Central air conditioning, multiple televisions and computers, large appliances, home offices, hot tubs, EV chargers, and other modern conveniences can place significantly more demand on an electrical system than what existed when many of these homes were built.

Pay attention to the electrical service size, panel condition, and whether the home still contains older wiring.

Some older homes may still have knob-and-tube wiring or other outdated electrical components. These don't necessarily mean you can't purchase the home, but they may require additional evaluation and could potentially affect renovation plans or insurance.

If your general inspector identifies concerns, having a licensed electrician evaluate the system is usually money well spent.

Roof and HVAC age

Michigan weather is tough on houses. Our roofs deal with snow, ice, rain, wind, summer heat, and repeated freeze/thaw cycles. Rather than relying solely on how a roof looks from the ground, ask about its age, installation history, and any previous repairs.

The same goes for the furnace and air conditioning. Ask for documented replacement dates, not just a visual "looks fine" from the seller. If either system is past its typical lifespan — generally 15-20 years for a roof, sometimes longer with a three dimensional shingle, and 12-15 years for an AC unit — that's a real negotiating point, and it's worth getting a specific quote for replacement to bring to the negotiating table rather than a vague estimate.

Plumbing material

Plumbing is another area where the age of the home matters. Some older Ann Arbor homes still contain galvanized plumbing. Galvanized pipes corrode internally as they age, meaning a pipe can look relatively normal from the outside while becoming increasingly restricted inside. That can lead to reduced water pressure, discoloration, leaks, and eventually the need for replacement. If galvanized plumbing is present, find out how much of the home's plumbing is still galvanized and whether portions of the house have already been updated.

Older plumbing isn't automatically a deal breaker. You simply want to understand what you're buying and account for future replacement in your budget.

Foundation and settling

Basements deserve particular attention in Michigan. An older basement isn't expected to look like a brand-new poured foundation, and some cracking or signs of previous moisture may not indicate a serious structural problem.

What matters is understanding why it's happening.

Look for evidence of active water intrusion, significant foundation cracking, bowing walls, repeated repairs, efflorescence, staining, musty odors, improperly managed downspouts, grading issues, and sump pump concerns.

Ann Arbor's seasonal rain, snowmelt, soil conditions, and freeze/thaw cycles make water management especially important.

If your inspector sees something beyond typical aging or minor settlement, that's when bringing in a foundation specialist or structural engineer can make sense.

Attic, Insulation and Ventilation

Older homes may have been updated several times over the decades, and sometimes those updates weren't done with today's ventilation and insulation standards in mind. Your inspector should look for adequate insulation, proper ventilation, signs of previous roof leaks, moisture, mold-like growth, and bathroom exhaust fans that terminate where they should. Improper attic ventilation can contribute to moisture problems, premature roof deterioration, and ice damming during Michigan winters.

What this actually means for your offer

None of these findings are reasons to walk away from an older home - they're reasons to negotiate with real numbers instead of guessing. A documented sewer issue or an aging HVAC system is a legitimate ask for a repair credit or a price adjustment. Sellers of older homes generally expect this conversation; it's a normal part of buying character-heavy inventory in an established neighborhood, and coming to the table with contractor quotes rather than vague concerns tends to get taken more seriously.

Building your inspection team

For an older Ann Arbor home, I generally recommend starting with a thorough general home inspection plus a sewer scope. Depending on what those inspections uncover, you may also want additional evaluation from a licensed electrician, plumber, HVAC contractor, roofer, foundation specialist, or structural engineer.

Yes, additional inspections cost money.

But spending a few hundred dollars to better understand a potential five-figure problem before closing is very different from discovering it after you own the house.

Frequently asked questions

Do I need a sewer scope on every older home in Ann Arbor? I strongly recommend a sewer scope on every home regardless of age. Better to know if there are issues before you sign on the dotted line,

How old does a home need to be before electrical panel issues are common? Panels installed before the 1990s are the ones worth extra scrutiny, especially if the home hasn't had electrical updates since, or if it carries a panel brand with known reliability concerns.

Can I negotiate repair credits based on inspection findings? Yes — documented issues like an aging roof, HVAC system, or sewer line problems are standard, reasonable negotiating points in Arizona real estate transactions.

Is buying an older home in Ann Arbor a bad idea? Absolutely not. Some of Ann Arbor's most sought-after homes and neighborhoods are older. The key is knowing what you're buying, understanding which systems have already been updated, and having a realistic plan for the ones that haven't.

Does Orangeburg need to be replaced if there aren’t any known issues? If Orangeburg is still present, I recommend treating replacement as a future necessity. A sewer professional can help determine its current condition and urgency, but the material itself is obsolete and has a limited lifespan.

Should I get a separate structural inspection on an older home? Only if your general inspector flags something specific, like significant cracking or doors sticking in multiple rooms. Most older home settling is cosmetic, but it's worth a professional opinion when in doubt.

Touring an older Ann Arbor home and wondering what's normal, what's negotiable, and what's actually worth worrying about? Send me a message before you write the offer. I can help you put together the right inspection strategy before you're under contract.