How to Compare Bulkhead and Seawall Contractor Quotes

Bulkhead quotes rarely arrive in the same format. One contractor sends a single number per foot. Another sends a lump sum with a page of exclusions. A third proposes a different material entirely. Comparing them by the bottom line alone is how owners end up paying for work they assumed was included.

Maryland's shoreline guidance recommends that contracts be based on plans and specifications, that both parties understand the scope of work, and that owners get estimates or bids from several contractors. This guide turns that advice into a step-by-step comparison. If you have not yet chosen who to invite, start with how to hire a marine contractor.

Why bids for the same wall differ

Price differences are normal in marine construction, and public records show how large they can be. In a 2014 City of Tampa bid, three contractors priced the same 172 feet of cast-in-place concrete seawall and cap at $205, $550 and $800 per foot. In a 2026 Texas bid for replacing wood cap boards, five bidders ranged from $14.72 to $44.00 per foot on the same 9,727 feet. A 2020 New Jersey study used the average of several contractor bid estimates, rather than any single bid, to represent local bulkhead prices.

Some differences reflect real scope or method differences. Others reflect workload, risk tolerance or simple error. Your job is to separate the two.

Step 1: Build a scope alignment table

Put every bid side by side. Fill in what each one actually says, and mark anything missing as "not stated."

North Carolina's coastal agency lists material, tiebacks, wall height, length, backfill, riprap, access and equipment among the factors that set bulkhead price. If those items differ across bids, the prices are not comparable yet. See factors affecting bulkhead pricing.

Step 2: Read the inclusions and exclusions

Exclusions shift cost back to you. Common ones to look for:

• Removal of the old wall, or leaving it in place
• Unforeseen obstructions, buried debris or rock
• Permit fees, surveys and engineering
• Electrical, dock or lift disconnection and reconnection
• Landscaping and irrigation repair
• Additional backfill beyond a stated quantity

Ask each bidder how changes and unforeseen conditions will be priced, and get that in writing.

Step 3: Clarify engineering and design

Ask whether the bid is based on an engineer's design, the contractor's standard detail, or an assumption. Maryland's guidance recommends using a certified engineer and an experienced contractor. If one bid includes engineering and another does not, add an allowance to the second before comparing. The project brief helps you give every bidder the same information.

Step 4: Confirm permit responsibility

Each bid should say who prepares applications, who pays fees and who carries the schedule risk if approvals take longer than expected. The Federal Trade Commission lists a contractor asking you to get the building permits yourself as a warning sign. See the bulkhead permit guide.

Step 5: Compare warranties

Warranties vary in length and coverage. Read what is covered (workmanship, materials, settlement behind the wall), what voids coverage (storm damage, owner modifications), and whether the manufacturer's material warranty is separate from the contractor's workmanship warranty. Get the warranty in writing as part of the contract.

Step 6: Review the payment schedule

The FTC advises against paying the full project cost upfront, notes that some states limit down payments, and recommends holding the final payment until the work is finished and you are satisfied. Payment milestones tied to completed stages are easier to verify than milestones tied to dates. Ask whether the contractor will provide lien releases from suppliers and subcontractors as payments are made; requirements vary by state.

Step 7: Check insurance and license

The FTC recommends confirming the contractor's license with your state or county and asking for proof of insurance. Ask for certificates of insurance and confirm them with the insurer. Licensing rules differ by state, and our guide to hiring a marine contractor covers how to verify them.

Questions to ask every bidder

Asking every bidder the same questions makes answers comparable.

1. What design or drawings is this price based on?
2. What is the top elevation of the new wall, and how deep will piles or panels go?
3. Will the old wall be removed, and where will debris go?
4. Who prepares and submits permit applications, and is the fee included?
5. What happens to the price if you hit buried debris or poor soils?
6. Who will supervise the crew on site each day?
7. What does the warranty cover, and for how long?

Write the answers into the table from Step 1, and ask for anything important to be added to the written bid.

Step 8: Normalize and decide

Once scopes are aligned, adjust for missing items using the other bids or written allowances, then compare totals. Use per-foot prices only as a cross-check; see bulkhead replacement cost per linear foot. If one bid is far below the others, the FTC suggests asking about large price differences rather than assuming a bargain.

Price is one factor. Responsiveness, clarity of the written scope, references and permit experience all matter for a structure expected to last decades. When you are ready for additional bids, find a contractor through our matching service.