I’ve been inside more high-end homes than I can count.

After more than 30 years designing luxury spaces in Los Angeles (and now testifying as an expert witness in dozens of cases), I can tell you one thing for sure. The same handful of construction defects keep showing up again and again in litigation.

These aren’t rare surprises. They’re the usual suspects that turn beautiful remodels into very expensive courtroom fights.

luxury California home living room ocean view interior design expert witness Lori Dennis ADA compliance Title 24 standards glazing lighting

Luxury California coastal living room designed with proper glazing, lighting, and open flow to meet high-end aesthetic, ADA compliance, and Title 24 standards.

Here’s my 2026 update on the top 10 I see most often in upscale California homes, along with what usually causes them and why they end up in court.

Water Intrusion (the #1 repeat offender) Flat roofs, huge glass walls, and fancy outdoor living spaces look amazing. Then water sneaks in. In my experience, poor flashing, bad waterproofing membranes, and drainage that builders didn’t design for California’s occasional downpours usually cause the problem. Mold follows. As a result, you end up with six-figure remediation bills and angry homeowners.
ADA Compliance Misses A gorgeous open-plan kitchen feels great — until the doorway is 29 inches wide or the ramp slope is off by a fraction. That’s why accessibility lawsuits keep increasing every year. These small oversights quickly become big liability headaches for builders and designers.
Title 24 Energy Code Violations California keeps tightening energy rules. For example, windows that don’t meet the latest U-factor, missing insulation details, or lighting controls that builders didn’t install correctly land designers and builders in hot water.
Drainage & Grading Problems Water pools right against the foundation when the landscape designer doesn’t coordinate with the civil plans. French drains that builders never installed, or grading that slopes toward the house instead of away, turn rainy seasons into disaster zones.
Lighting & Glare Issues Beautiful chandeliers and recessed lights look stunning — until glare creates slip/trip hazards or violates ADA illumination standards. Interestingly, I’ve seen cases where improper lighting levels directly contributed to falls.
Stucco & Exterior Finish Failures Cracking, delamination, or efflorescence (that white powdery stuff) usually comes from poor installation or incompatible materials. In luxury homes, owners expect perfection, and they sue when they don’t get it.
Window & Door Leaks High-end European windows and sliders are gorgeous, but if flashing and sealing aren’t done exactly right, leaks appear. These cases often tie back to water intrusion — the #1 repeat offender.
Cost-to-Cure Surprises The contractor says “it’ll be $50K to fix,” but the real number is $250K. Underestimating scope of loss or cost-to-cure often triggers breach-of-contract claims.
Sustainability Shortcuts Green features (solar-integrated roofs, recycled materials, LEED points) that builders didn’t install or test properly cause problems. With more buyers demanding eco-luxury, these defects climb fast in 2026.
Standard of Care Disputes The designer followed the “industry norm” — but was that enough for a $5M+ home? These cases usually hinge on whether the professional met the expected standard of care for luxury projects in California.

Bottom line: these defects aren’t rare — they’re predictable. The good news is most can be avoided with better coordination, clear specifications, and someone who’s seen the courtroom side of things.

If you’re an attorney dealing with any of these (or think you might be soon), I’m happy to chat — no obligation. I’ve been on both sides of the table and know what helps move cases forward.

Free initial consultation. $600/hour for document review, depositions, trial, etc. (8-hour retainer) Available nationwide.

Download my full CV & fee schedule → Click here to view/download PDF

Contact me directly → Call 310-493-3972 or email lori@loridennis.com

Looking forward to hearing from you.

Lori

Lori Dennis, ASID, LEED AP, one of the top interior designers in Los Angeles, is an HGTV celebrity, TED speaker, expert witness, best selling author, and influencer in the design and organic lifestyle space who has been featured in a wide variety of publications around the world, from Wall Street Journal, Architectural Digest, New York Times, House Beautiful to Woman’s Day and Coastal Living. She has appeared on HGTV, OWN, Bravo, Food Network, NBC and Oxygen. The founder of an award-winning, interior architecture firm specializing in sustainability, Lori has been recognized by industry titans like American Express, Verizon, Volvo, Lamps Plus and Viking as an expert in luxury, wellness and balanced living. Lori speaks at corporate, university and trade events around the world.

Top 10 Construction Defects I See Most in Luxury California Homes (2026 Update)

I’ve been inside more high-end homes than I can count.

After more than 30 years designing luxury spaces in Los Angeles (and now testifying as an expert witness in dozens of cases), I can tell you one thing for sure. The same handful of construction defects keep showing up again and again in litigation.

These aren’t rare surprises. They’re the usual suspects that turn beautiful remodels into very expensive courtroom fights.

Here’s my 2026 update on the top 10 I see most often in upscale California homes, along with what usually causes them and why they end up in court.

ADA Compliance Misses A gorgeous open-plan kitchen feels great — until the doorway is 29 inches wide or the ramp slope is off by a fraction. That’s why accessibility lawsuits keep increasing every year. These small oversights quickly become big liability headaches for builders and designers.

Title 24 Energy Code Violations California keeps tightening energy rules. For example, windows that don’t meet the latest U-factor, missing insulation details, or lighting controls that builders didn’t install correctly land designers and builders in hot water.

Drainage & Grading Problems Water pools right against the foundation when the landscape designer doesn’t coordinate with the civil plans. French drains that builders never installed, or grading that slopes toward the house instead of away, turn rainy seasons into disaster zones.

Lighting & Glare Issues Beautiful chandeliers and recessed lights look stunning — until glare creates slip/trip hazards or violates ADA illumination standards. Interestingly, I’ve seen cases where improper lighting levels directly contributed to falls.

Stucco & Exterior Finish Failures Cracking, delamination, or efflorescence (that white powdery stuff) usually comes from poor installation or incompatible materials. In luxury homes, owners expect perfection, and they sue when they don’t get it.

Window & Door Leaks High-end European windows and sliders are gorgeous, but if flashing and sealing aren’t done exactly right, leaks appear. These cases often tie back to water intrusion — the #1 repeat offender.

Cost-to-Cure Surprises The contractor says “it’ll be $50K to fix,” but the real number is $250K. Underestimating scope of loss or cost-to-cure often triggers breach-of-contract claims.

Sustainability Shortcuts Green features (solar-integrated roofs, recycled materials, LEED points) that builders didn’t install or test properly cause problems. With more buyers demanding eco-luxury, these defects climb fast in 2026.

Standard of Care Disputes The designer followed the “industry norm” — but was that enough for a $5M+ home? These cases usually hinge on whether the professional met the expected standard of care for luxury projects in California.