Most homeowners feel underqualified when hiring a deck contractor. They're spending $20,000 to $50,000, they don't know the technical details, and they're relying on instinct and online reviews to make a decision that will affect their home for 25 years. But contractor qualification is actually straightforward — you're asking five specific, verifiable questions, and the answers either hold up or they don't.

Why These Questions Work

These questions aren't designed to trick contractors or catch them off guard. They're designed to verify the things that are non-negotiable for a legitimate, professional construction contract in Washington State. A contractor who answers all five confidently — with specific, verifiable answers — is a contractor who operates correctly. A contractor who hedges, redirects, or can't answer is showing you something important about how they run their business.

Question 1: Are You Licensed and Bonded in Washington State — and Can I Verify It?

In Washington State, anyone who performs construction work for compensation must hold a current contractor's license issued by the Department of Labor and Industries. "Current" means active, bonded, and insured — all three requirements must be in good standing simultaneously for the license to be valid.

Ask for the contractor's UBI number (Unified Business Identifier) or their specific contractor license number. Then verify it yourself at the L&I Contractor Lookup at secure.lni.wa.gov/verify. A search takes about ten seconds and eliminates unlicensed contractors completely.

The bond requirement matters because it provides a basic layer of financial protection if the contractor fails to complete the work or causes damage and refuses to remedy it. Washington State's minimum bond amounts are modest — they're not a comprehensive guarantee — but the bonding requirement itself filters out contractors who can't obtain it due to prior claims or financial instability.

A licensed contractor will hand you their license number without hesitation. They're proud of it, and they've worked to maintain it. A contractor who is vague about their license status, claims they're in the process of renewing, or provides a number that doesn't verify in the L&I system is operating unlicensed — which is both illegal in Washington State and a significant financial and legal risk to you.

Question 2: Who Pulls the Permits, and Is That Included in the Quote?

A building permit is required for most residential decks in the Seattle area — specifically, any deck that is attached to the house or elevated more than 30 inches above grade at any point. The permit process involves submitting construction drawings for plan review, paying the associated fees, and having the structure inspected at required milestones during construction.

Ask this question in two parts. First: does this project require a permit? Second: if yes, is permit management included in your price, or billed separately?

A reputable contractor handles permit management as a standard part of the project scope. They know the requirements for the relevant jurisdiction — whether that's unincorporated King County, SDCI in Seattle city limits, or the building department in Bellevue, Kirkland, Sammamish, or one of the other cities we serve — and they submit the application, respond to plan review comments, schedule and coordinate required inspections, and close out the permit as part of their standard service.

If a contractor suggests that permits are unnecessary when they are in fact required, or offers to reduce the project price by skipping them, stop the conversation at that point. Building without a required permit creates an unpermitted structure — a documented code violation that travels with the property, not with you personally. When you sell your home, Washington State disclosure requirements obligate you to disclose known unpermitted structures. Lenders flag unpermitted improvements during appraisal, and the discovery of an unpermitted deck can require remediation at the seller's expense or derail a transaction entirely. Beyond the financial exposure, the structural inspections required for a permitted deck exist because footings, framing, and ledger connections are the elements most likely to cause catastrophic failure if installed incorrectly.

Question 3: What's Your Warranty — Materials AND Workmanship, Separately?

There are two distinct warranties that apply to any deck installation, and they cover completely different things. Understanding the difference protects you from assuming coverage that doesn't exist.

The manufacturer's warranty covers defects in the materials themselves — composite boards that fade outside warranty parameters, boards that delaminate or show manufacturing defects, railing hardware that corrodes prematurely. These warranties are issued by the manufacturer and remain in force regardless of whether the contractor who installed the product continues to be in business. Premium capped composite brands carry 25-year fade and stain warranties on their top lines. PVC decking products carry warranties of 30 to 50 years.

The workmanship warranty covers something entirely different: installation errors. Ledger flashing that allows moisture infiltration into the house wall. Fasteners that work loose because the correct fastener schedule wasn't followed. Framing that settles because footings weren't set to the required depth. Railing posts that develop movement because the post anchors were installed incorrectly. None of these failures show up as defective materials — they show up as installation failures, and the manufacturer warranty explicitly does not cover installation errors.

Ask specifically: what workmanship warranty do you provide on your labor, what does it cover, what conditions would void it, and is it documented in the contract? A quality contractor offers a minimum of two years on workmanship; better ones offer five. Accept the answer in writing in the contract, not as a verbal commitment that may be interpreted differently if a problem arises.

Question 4: How Do You Handle Change Orders?

Scope creep is the primary mechanism by which construction projects exceed budget. It starts with decisions that each seem small — the homeowner decides to add two feet of deck width after seeing the framing, the contractor discovers the existing ledger requires replacement, a specified material is unavailable and a substitute is proposed. Each individual change is manageable. Collectively, without a controlled process, they can add 20 to 30 percent to the final cost.

The question you're asking is: does this contractor have a formal, written change order process? The correct answer is yes — all changes to the contracted scope of work are documented in writing with an agreed price and signed by both parties before the changed work is performed.

Verbal agreements about change orders are not reliably enforceable, and in practice they are frequently interpreted differently by homeowners and contractors. A contractor who says changes are handled case by case or worked out as the project goes is a contractor who is maintaining flexibility about how those costs get allocated — flexibility that typically advantages the contractor when the invoice arrives.

Ask to see a sample change order document. Any contractor who handles change orders correctly will have a standard form. The form should identify the original contract, describe the specific change, quantify the cost impact, and require signatures from both parties before the work proceeds.

Question 5: Can You Show Me a Project Similar to Mine, and Can I Contact That Homeowner?

References are standard in the contracting industry, and a contractor with a strong track record provides them without hesitation. Ask specifically for two or three homeowner references from projects similar to yours in scope — comparable deck size, material type, site complexity — completed within the past two years.

When you contact those references, ask specific questions: Did the project finish on or near the quoted price? Were there change orders, and how were they handled? How was the contractor's communication during the project — did they update you proactively, or did you have to chase for information? What does the deck look like now, one or two years after installation? Would you hire this contractor again?

Recent Google reviews supplement personal references but don't replace them. A personal reference who can describe the actual experience — including how unexpected problems were handled — provides information that no review platform captures. The willingness to provide direct homeowner references, and the quality of those references, tells you something about the contractor's confidence in their own track record.

Bonus: What Does Your Cleanup Process Look Like Each Day?

This question isn't a disqualifier — every licensed contractor will build you a code-compliant deck. But the answer reveals something about operational professionalism that affects your daily experience during construction.

A contractor who describes a daily cleanup routine — scrap material staged for removal each day, job site secured at end of work, tools stored and debris not allowed to accumulate — operates differently than a contractor who works in the site "as-is" until project completion. Your yard, your neighbors' experience, your family's safety around the construction zone, and the general impression of how seriously the contractor takes their work are all reflected in the answer to this question.

We Answer Yes to All Five

Our Washington State contractor license is current and publicly verifiable at the L&I Contractor Lookup. We handle all permits as a standard part of every project and include permit fees in our written quotes. We provide a five-year workmanship warranty, documented in the contract, in addition to manufacturer warranties on all materials. Every change order we process is documented in writing and signed before any changed work is performed. We have dozens of homeowner references across King County who will speak with prospective clients directly.

Learn more about our team and project history on our [about page](/about). Ready to get your questions answered in person? [Contact us](/contact) for a free, no-pressure consultation.