5 Tips to Avoid Interior Design Lawsuits: What Designers & Architects Need to Know

After more than 30 years running interior design, construction, and windows-and-doors businesses—and training more than 70,000 design and architecture professionals through Design Campus—I have learned something simple: most lawsuits do not begin with bad design. They begin in the gray areas.

A beautiful project cannot protect a designer or architect from a vague agreement, an undocumented decision, or a client who remembers a conversation differently. The good news is that a few disciplined business habits can prevent many expensive disputes before they begin.

1. Start With a Strong Contract

A strong written contract should explain the scope, fees, purchasing and procurement procedures, schedule, exclusions, change orders, termination rights, and dispute process. It should also address what happens when custom goods are delayed, damaged, changed, or no longer available.

A contract is not a sign that you distrust the client. It is how you preserve the relationship when a luxury residential, hospitality, or commercial project becomes complicated. Clear expectations make it easier for everyone to work together.

2. Put Every Important Conversation in Writing

After a call, site meeting, or major conversation, send a short email confirming what the team decided, who is responsible, and when the next step is due. Ask the client to reply if anything in the summary is incorrect.

The email does not need to sound legal. It needs to be clear. When a design or construction dispute develops months later, a simple written record can be far more valuable than anyone’s memory.

3. Never Purchase Without Detailed Written Approval

Before ordering, give the client a detailed purchase order that identifies the vendor, item or model, finish, color, dimensions, quantity, price, freight, tax, lead time, and return or cancellation terms. Obtain written approval before placing the order or paying a deposit.

This protects the client as much as it protects the design firm. Everyone can see exactly what was authorized, which reduces confusion about substitutions, custom specifications, pricing, and procurement fees.

4. Define Who Is Responsible for What

Luxury projects often involve an interior designer, architect, contractor, engineers, consultants, vendors, installers, and the client. The contract should state who handles permits, code compliance, field dimensions, construction means and methods, shop drawings, coordination, installation, purchasing, and final approvals.

Have the client agree to those roles in writing, and document any later changes. A clearly defined responsibility matrix helps prevent a design defect or construction defect from being assigned to the wrong professional.

5. Disclose Commissions and Financial Benefits

If your firm charges a percentage, markup, commission, or procurement fee, disclose it in plain language. The same applies to trade discounts, rebates, loyalty rewards, bonuses, or other financial benefits connected to purchases.

Your agreement can state that the firm may participate in these programs. Honest disclosure removes surprises, protects trust, and gives the client the information needed to approve the business arrangement.

The Best Protection Is a Clear Record

Luxury projects involve large budgets, custom products, long lead times, and many decision-makers. That makes documentation more important, not less. In my work as a luxury interior design expert witness, I repeatedly see that the strongest defense is not a clever explanation after the fact. It is a clear record created while the project was moving forward.

The goal is not to run a fearful business. It is to run a professional one. Clear contracts, written decisions, signed approvals, defined roles, and honest financial disclosures give designers, architects, contractors, and clients the same roadmap. That is how I run my businesses, and it is one of the most important lessons I taught through Design Campus.

If a high-value residential, hospitality, or commercial design dispute requires an expert who understands design, construction, procurement, valuation, and industry practice, contact Lori Dennis.

About Lori Dennis

Lori Dennis is one of California’s most accomplished luxury interior designers, with a rare multidisciplinary career spanning interior architecture, construction, media, publishing, education, product development, and expert witness testimony. Few design professionals combine this breadth of experience with a trusted role in complex construction and design litigation. Her unique background provides an uncommon level of technical expertise, industry insight, and real-world perspective.