What Insurance Carriers Look for When Insuring an Older Houston Home

Why Older Homes Are Underwriting Conversations

Houston's most desirable neighborhoods — Bellaire, West University Place, Meyerland, Braeswood, Southampton, Montrose — are largely built from mid-century housing stock. The homes that defined these neighborhoods were constructed in the 1940s through 1970s, with some reaching back to the 1920s and 1930s. They have architectural character, established lots, and community roots that newer subdivisions can't replicate.

They also have mechanical systems that were installed when building codes, materials science, and our understanding of fire and water risk looked very different. From an insurance carrier's perspective, certain features of older homes represent elevated loss potential — and carriers respond to elevated loss potential with higher premiums, exclusions, coverage restrictions, or in some cases, declination.

Understanding what carriers look for in older homes — and what you can do about it — is practical knowledge for any Bellaire or West U homeowner, and essential due diligence for anyone buying in these neighborhoods.

Electrical Systems: The Three Panel Problems

Federal Pacific Electric (FPE) Stab-Lok panels were installed in millions of American homes from the 1950s through the 1980s. Consumer safety researchers and electricians have documented a pattern of Stab-Lok breakers failing to trip under overload conditions — meaning the circuit protection the panel is supposed to provide may not function when it's needed. Many insurance carriers either decline to write new policies on homes with FPE Stab-Lok panels or require their replacement as a condition of coverage.

Zinsco panels (also sold under the Sylvania brand) were similarly common in homes built through the 1970s. Zinsco breakers have a documented tendency to bond to the bus bar over time, which can prevent them from tripping and create fire risk. Carrier treatment of Zinsco panels varies — some decline, some surcharge, some require a licensed electrician's inspection.

Knob-and-tube wiring — the earliest residential electrical system, used from approximately the 1880s through the 1940s — is present in some of Houston's oldest homes. It is ungrounded, lacks modern insulation standards, and cannot safely serve the electrical demands of contemporary households. Most carriers either decline to insure homes with active knob-and-tube wiring or require an electrical inspection and any recommended remediation before binding coverage.

If you own or are purchasing a Houston home built before 1980, having a licensed electrician assess the panel and wiring before applying for homeowners insurance is worthwhile — both to understand what you're buying and to avoid surprises in the underwriting process.

Plumbing: Galvanized Steel and Polybutylene

Galvanized steel pipe was the standard residential plumbing material through the 1950s and into the 1960s. It is prone to internal corrosion over time, which reduces water pressure, degrades water quality, and eventually leads to leaks and failures. Carriers view galvanized plumbing as a water damage risk — and water damage claims are among the most frequent and costly in residential insurance. Some carriers decline to write new policies on homes with galvanized supply lines; others accept the risk with a surcharge.

Polybutylene pipe — a gray plastic material — was widely used in residential construction from roughly 1978 to 1995. It was inexpensive, easy to install, and initially seemed like a durable alternative to copper. Over time, polybutylene reacts with chlorine and other common water treatment chemicals, becoming brittle and prone to cracking at fittings and joints. A class action settlement in the 1990s addressed many claims, but polybutylene pipe is still present in Houston homes built in the late 1970s through early 1990s — and many carriers either decline to write these homes or price the risk accordingly.

Copper plumbing, by contrast, remains the preferred material from an underwriting standpoint. If you're renovating an older Houston home, replacing galvanized or polybutylene supply lines with copper (or cross-linked polyethylene, known as PEX) typically improves your carrier options and can reduce your premium.

Roofing: Age, Material, and Condition

Roofing is the single most scrutinized physical feature in Texas homeowners underwriting, for the obvious reason that Houston's hail and wind exposure makes roofs the most frequently claimed structural component. Carriers in the Texas market pay close attention to roof age, material, and condition.

Most carriers in the Texas market will not write new policies on homes with composition shingle roofs older than 15–20 years, depending on the carrier. Some will write older roofs on an actual cash value basis only — meaning roof claims will be settled with depreciation applied. Others require a roof inspection before binding coverage on a home with a roof over a certain age.

The material matters too. Three-tab asphalt shingles have a shorter effective life and less wind resistance than architectural (dimensional) shingles. Metal roofing is viewed favorably by most carriers and often qualifies for a premium discount. Tile and slate — less common in Houston but present in higher-end older homes — have their own carrier considerations.

If you're purchasing an older Houston home and the roof inspection shows the roof is within a few years of the carrier's age threshold, factor in the cost of replacement when evaluating the purchase. Discovering at policy renewal that your carrier is non-renewing due to roof age — without time to replace it and find new coverage — is a stressful situation that a pre-purchase inspection can prevent.

What to Do if You Own an Older Home

The practical advice is simple, even if the work involved isn't: know what you have. An inspection by a licensed electrician ($150–$350) and a plumber ($100–$250) can identify the systems that carriers will flag before you encounter them in an underwriting process. Many Bellaire and West U homeowners are surprised to discover panels or plumbing in their homes that they weren't aware of when they bought.

Updates to problematic systems don't just improve your insurability — they reduce your actual risk of fire and water damage, which is a meaningful benefit independent of the insurance conversation. And in a competitive Houston real estate market, having updated electrical and plumbing is a selling point when the time comes.

If you're currently insured on a home with one of these features, it's worth understanding whether your current carrier is aware of it and how they've addressed it in your policy. Some homeowners discover at claim time that a condition that existed when they applied for coverage was never disclosed — and that the carrier is using that non-disclosure to limit or deny the claim.

There's a more expensive version of this scenario worth understanding: if your older home with outdated electrical, plumbing, or HVAC suffers a significant loss — a fire that damages 40 percent of the structure, a major water event that crosses the substantial damage threshold — you'll be required to bring the entire home up to current code as part of the rebuild. That means replacing the Zinsco panel you've been meaning to address, repiping the galvanized supply lines, and meeting current HVAC requirements — whether or not any of those systems were part of the original loss. The code compliance cost in this scenario is additive to the covered repair cost. Unless your ordinance or law coverage is substantial, most of it falls on you.