7 Essential Questions to Ask Before Hiring a Retaining Wall Contractor

Hiring the right retaining wall contractor is the difference between a lifetime investment and a multi-thousand-dollar failure. In Washington State, where glacial till and heavy rainfall are standard, a retaining wall isn't just a decorative garden border — it is a critical piece of engineering designed to hold back tons of earth and manage water runoff. Choosing the wrong contractor can mean a wall that leans, cracks, or collapses within a few years.

The main question homeowners often have is: "How do I know if this contractor actually knows how to build a structural wall?" The answer lies in asking the right questions before you sign anything. Here are the seven questions every Seattle-area homeowner should ask.

7 Questions to Ask Any Retaining Wall Contractor

1. Are You Licensed and Insured in Washington State?

Any legitimate contractor should carry a current Washington State contractor's license and general liability insurance. Ask for both and verify them at the L&I Contractor Verify website. An unlicensed contractor leaves you exposed to liability if a worker is injured on your property.

2. Do You Pull Permits When Required?

In most Washington cities, retaining walls over 4 feet in height require a building permit. Some jurisdictions require permits for walls over 3 feet. A contractor who skips permits is cutting corners — and leaving you liable for any code violations when you sell your home. Ask directly: "Will you pull the permit, or am I responsible for that?"

3. What Drainage System Do You Include?

Poor drainage is the number one cause of retaining wall failure in the Pacific Northwest. Every properly built wall needs a drainage plan — typically a gravel backfill layer and a perforated drain pipe at the base. Ask specifically what they install behind the wall and how water exits the system. If a contractor can't answer this question clearly, walk away.

4. Can I See Photos of Similar Projects You've Completed?

Ask for photos of walls similar in height, material, and site conditions to yours. Better yet, ask for references from those specific projects and actually call them. A contractor confident in their work will have no hesitation providing references from recent jobs in your area.

5. What Materials Do You Recommend and Why?

A knowledgeable contractor will explain the tradeoffs between natural stone rockery, concrete block, and poured concrete based on your specific site conditions, soil type, and aesthetic goals. Be cautious of anyone who only offers one solution regardless of your situation — different sites call for different approaches.

6. What Does Your Warranty Cover?

Ask what is covered, for how long, and what voids the warranty. A contractor confident in their work will stand behind it. At minimum, look for a warranty that covers structural defects and wall movement. Get the warranty terms in writing before signing any contract.

7. What Is the Payment Schedule?

Never pay 100% upfront. A standard and fair payment schedule is a deposit to secure your project date, a progress payment at a defined milestone (such as foundation completion), and a final payment only after you have inspected the finished work and are satisfied. Any contractor demanding full payment before work begins is a red flag.

One More Thing: Get Multiple Quotes

Always get at least three written quotes before choosing a contractor. A quote that is significantly lower than the others usually means something is being left out — drainage, permits, proper foundation depth, or quality materials. The cheapest bid is rarely the best value when it comes to structural work.

New Life Rockeries has been building retaining walls across King, Snohomish, and Skagit counties since 1975. We're licensed, insured, and happy to answer every one of these questions in detail. Request a free estimate or call us at 425-584-6878 to talk through your project.