In older San Diego homes, inspections most often flag aging roofs, deteriorated cast-iron or clay sewer lines, outdated electrical panels and wiring, foundation movement on hillside or clay soils, galvanized plumbing, and concealed water or dry-rot damage. These age- and climate-driven issues are common from Point Loma to Escondido and rarely deal-breakers when documented early.
Technically, a home inspection isn’t a pass/fail test the way a smog check is. Our job at The Real Estate Inspection Company is to document the home’s actual condition so buyers and sellers can make informed decisions. That said, certain defects come up again and again in homes built before the 1990s across San Diego County. Here’s what we see most.
Why do older San Diego homes fail inspection more than newer ones?
Older homes accumulate two kinds of problems: things that simply wear out with age, and things that were built to outdated standards or were never permitted. A 1960s Clairemont rancher or a 1920s Mission Hills bungalow has had decades for roofs to degrade, sewer pipes to corrode, and additions to be tacked on without proper permits. San Diego’s coastal salt air, expansive clay soils inland, and hillside lots add region-specific stress that a national checklist misses. With more than 20 years inspecting local homes, owner and lead inspector Joseph Romeo, an InterNACHI Certified Professional Inspector (CSLB GC #1113143), focuses on the conditions that actually matter here.
What are the most common roof and exterior issues?
The roof is the single most frequently flagged system on older homes. We routinely find brittle or curling composition shingles past their service life, cracked clay tiles, failed flashing around chimneys and skylights, and worn-out built-up flat roofs that pond water. On the exterior, stucco cracks, dry rot in eaves and trim, and deteriorated decks or balconies are common, especially near the coast in La Jolla, Encinitas, and Coronado where salt air accelerates corrosion. We document each finding with photos and severity ratings; see our roof inspections page for how we evaluate roofing condition.
What plumbing and sewer problems show up in older homes?
Aging supply and waste lines are a top concern. Many San Diego homes built before the 1970s still have galvanized steel supply pipes that corrode internally and choke water pressure, or even short runs of polybutylene in later eras. On the waste side, cast-iron and clay sewer laterals crack, scale, and get invaded by tree roots. Because the most serious sewer damage is underground and invisible during a standard visual inspection, we recommend a camera-based sewer scope on older properties. Repairing a collapsed lateral can run into the thousands, so confirming its condition before closing is worth it. Costs vary widely; request a quote at (619) 752-4399.
What electrical defects are most often flagged?
Electrical issues are both common and safety-critical in older San Diego homes. We frequently find undersized service, obsolete or recalled panels (such as certain Federal Pacific and Zinsco panels), knob-and-tube or cloth-insulated wiring in pre-war homes, aluminum branch wiring from the mid-1960s to mid-1970s, missing GFCI protection in kitchens and bathrooms, and amateur DIY junctions. None of these automatically kill a sale, but they’re items buyers should price out and address. Many homeowners pair the electrical review with thermal imaging, which can reveal overheating circuits and hidden moisture behind walls.
How serious are foundation and structural findings?
San Diego’s mix of expansive clay soils inland (Escondido, El Cajon, Santee) and steep hillside lots (Point Loma, La Mesa, parts of the coast) makes foundation movement a recurring finding. We look for cracking in slabs and stem walls, sloping floors, sticking doors, and signs of soil settlement or slope creep. Most cracks are cosmetic, but some signal real movement that warrants a licensed structural engineer, whom we coordinate referrals to. Our concrete slab survey uses precise floor-level measurements to separate normal aging from active problems, so you’re not guessing.
Do older homes have pest, water, and balcony issues too?
Yes. We note visible signs of wood-destroying organisms such as termite damage and dry rot, but an official WDO clearance must come from a licensed pest control company, which we coordinate on your behalf. We also document water intrusion at windows, roof penetrations, and below grade, plus deferred maintenance like aged water heaters and HVAC units. For older multi-unit and HOA buildings, elevated balconies, decks, and stairways now fall under California’s SB-721 (apartment buildings with 3+ units, first inspection deadline January 1, 2026, re-inspected every 6 years) and SB-326 (condos and HOA-governed buildings, at least every 9 years). We handle those SB-721 balcony inspections too.
Should I be worried if my older home flags these issues?
Not necessarily. Almost every older home shows several of these conditions, and a thorough report is meant to inform your negotiation or repair planning, not scare you off. The goal is a clear, photo-documented picture of the home’s real condition so you can budget, negotiate credits, or walk away with eyes open. You can see exactly what’s covered on our what we inspect page.
Buying or selling an older home anywhere in San Diego County, from Carlsbad to Chula Vista? Get an inspection that knows local construction and climate. Call The Real Estate Inspection Company at (619) 752-4399 to schedule.
