How to Bid Commercial Fence Projects: Contractor's Guide

Commercial fence work is where the real money is — but it's also where the real mistakes happen. A residential job might cost you a few hundred bucks if you underbid. A commercial project can cost you tens of thousands. The bidding process is more formal, the specs are more demanding, and the competition is stiffer. Here's how to approach commercial fence bidding so you win profitable jobs instead of losing your shirt.

Understanding the Commercial Bidding Process

Commercial fencing projects typically follow a formal procurement process. Unlike residential work where a homeowner calls you and you give them a price, commercial projects involve:

Invitation to Bid (ITB) or Request for Proposal (RFP): A formal document that describes the project, specifications, timeline, and submission requirements.
Plan sets and specifications: Architectural or engineering drawings showing fence locations, heights, types, and details.
Pre-bid meetings: Optional or mandatory site visits where all bidders walk the project with the general contractor or owner.
Sealed bid submission: Your price goes in a sealed envelope (or online portal) by a hard deadline.
Award based on lowest qualified bid (usually) or best value (sometimes).

Types of Commercial Fence Projects

New construction: Schools, hospitals, warehouses, parks, government buildings, apartment complexes
Perimeter security: Industrial facilities, data centers, water treatment plants, airports
Athletic facilities: Ball fields, courts, tracks, playgrounds
DOT and highway: Guardrails, right-of-way fencing, noise barriers, wildlife fencing
Government/military: Often requires specific security ratings (ASTM F2781, anti-climb, etc.)

Reading the Specs: What to Look For

The specification section (usually Division 32 — Exterior Improvements, Section 32 31 00 — Fencing and Gates) tells you exactly what's required. Read every word. Here's what matters most:

Material Specifications

Commercial specs are precise. They'll call out:

Post size and wall thickness (e.g., 2-7/8" OD SS40 for line posts, 4" OD SS40 for terminal posts)
Fabric gauge and mesh size (e.g., 9-gauge, 2" diamond mesh)
Coating type (galvanized per ASTM A392, vinyl-coated, powder-coated)
Top rail requirements (1-5/8" OD galvanized, or no top rail — barbed wire instead)
Concrete footing specs (diameter, depth, mix design, PSI rating)

Don't substitute materials unless the spec says "or equal" and you submit the substitution for approval before bid day.

Gate Requirements

Gates are where commercial jobs get expensive fast. Pay attention to:

Gate sizes — a 20-foot double swing gate costs far more than a 4-foot pedestrian gate
Operators — automatic gate operators (slide gates, swing gates) can cost $3,000 to $15,000+ per opening
Access control — card readers, keypads, intercom systems (often a separate trade, but sometimes included in fence scope)
Hardware specs — commercial hinges, latches, drop rods, cane bolts, panic hardware

Davis-Bacon and Prevailing Wage

If the project uses federal funding (schools, government buildings, infrastructure), Davis-Bacon prevailing wage rates may apply. This means you're required to pay your workers a minimum hourly rate set by the Department of Labor for that county and trade classification.

Prevailing wage rates can be 30 to 100 percent higher than your normal labor costs. If you bid at your normal labor rate on a prevailing wage job, you'll either lose money or violate federal law. Neither is good.

How to check: The bid documents will state whether Davis-Bacon applies. You can also check rates at sam.gov (formerly the Wage Determinations website). Look for the "Fence Erector" or "Ironworker" classification for your county.

Site Visit and Takeoff

Walking the Site

Never bid a commercial project from plans alone if you can help it. The site visit reveals things that plans don't:

Soil conditions — rocky soil means more time and possibly different equipment for post holes
Access — can your truck and equipment reach all areas of the fence line? Tight spaces mean hand-digging.
Existing conditions — is there a fence to remove? Underground utilities? Easements?
Grade changes — slopes, ditches, and elevation changes that affect post lengths and material quantities
Obstacles — trees, rocks, buildings, utility boxes that the fence line has to work around

Doing the Takeoff

A takeoff is your material and labor count derived from the plans. For a commercial fence takeoff:

Measure every linear foot of each fence type from the plans. Use a scale ruler or digital takeoff software.
Count every post — terminal posts (ends, corners, gate posts) and line posts (spaced per spec, usually 10 feet OC).
Count every gate — width, type (swing, slide, cantilever), manual or automated.
Calculate concrete — based on specified footing dimensions for each post type.
Calculate fabric and rail — based on linear footage plus 5 to 10 percent waste.
Note special items — barbed wire, razor wire, privacy slats, windscreen, crash-rated bollards, operator wiring.

Takeoff Tools

Paper plans + scale ruler: Old school but reliable. Highlight as you count to avoid double-counting or missing sections.
Digital takeoff software: Bluebeam, PlanSwift, or On-Screen Takeoff let you measure directly on PDFs. Faster and more accurate for large projects.
FenceCalc: Build your estimate section by section with per-foot pricing and material lists, then export for your bid.

Pricing the Job

Material Pricing

Get current quotes from your suppliers for every material on the spec. Don't use last month's prices — steel and aluminum prices fluctuate. Ask for a price hold through the anticipated project start date.

For large projects, you can often negotiate volume discounts. A 5,000-linear-foot chain link job will get better pricing than a 200-foot residential job from the same supplier.

Labor Estimation

Commercial labor rates depend on:

Crew size and experience — a 3-person experienced crew vs. a 2-person crew with a new helper
Fence type — chain link installs faster than ornamental iron or welded mesh
Site conditions — easy access and flat ground vs. hillside with hand-dig
Prevailing wage — if applicable, use the required rates plus your burden (taxes, insurance, benefits)

Rule-of-thumb production rates (experienced crew of 3):

Chain link, 6 ft, flat terrain: 150 – 250 lf per day
Ornamental iron/aluminum: 80 – 150 lf per day
Welded wire mesh panels: 100 – 200 lf per day
Slide gate operator installation: 1 – 2 per day
Swing gate (manual, double): 2 – 4 per day

Equipment Costs

Factor in equipment that the job requires:

Skid steer with auger: $250 – $500/day rental if you don't own one
Concrete mixer or ready-mix delivery: depends on volume
Welding equipment: for ornamental and security fencing
Boom lift or crane: for tall fencing or difficult access areas

Markup and Profit

Your bid needs to cover direct costs (materials + labor + equipment) plus overhead and profit.

Overhead: office, insurance, vehicles, estimating time, supervision, callbacks, warranty — typically 10 to 20 percent of direct costs
Profit: your target margin, typically 10 to 20 percent on commercial work
Total markup: 20 to 40 percent over direct costs is the normal range

If you're new to commercial work, resist the urge to bid thin to "get your foot in the door." Winning a job at 5 percent margin and then hitting one unexpected problem (rock, change order, weather delay) turns that into a loss.

Bonding and Insurance

Bid Bonds

Many commercial projects require a bid bond — typically 5 to 10 percent of your bid amount. This guarantees that if you're awarded the contract, you'll actually sign it. If you win and walk away, the bond covers the difference between your bid and the next lowest bidder.

Performance and Payment Bonds

On larger projects (especially government work), you'll need performance and payment bonds — usually 100 percent of the contract value each. These bonds guarantee that you'll complete the work (performance) and that you'll pay your suppliers and subcontractors (payment).

Bond costs: Typically 1 to 3 percent of the contract value annually. Your bonding capacity depends on your company's financial statements, experience, and track record.

Insurance Requirements

Commercial contracts usually require:

General liability: $1M to $2M minimum, sometimes $5M with umbrella
Workers' compensation: required in most states
Auto liability: $1M minimum
Additional insured endorsement: naming the project owner and GC on your policy

Get your certificates of insurance ready before bid day. Some bids require them submitted with the bid package.

Bid-Day Checklist

The day you submit your bid, run through this checklist:

Common Mistakes in Commercial Bidding

Undercounting gates. Gates are the most expensive per-unit item on most commercial jobs. Missing one 24-foot cantilever slide gate with an operator can cost you $8,000 to $15,000 in unrecovered costs.
Ignoring prevailing wage. Bidding at your normal labor rate on a Davis-Bacon job will either lose you money or get you in legal trouble.
Not reading the spec. The spec says SS40 posts and you priced SS20 — that's your problem, not the owner's.
Forgetting mobilization. Getting your crew and equipment to a commercial site might involve an hour of drive time each way, traffic, parking, and site-specific safety requirements (hard hats, safety vests, OSHA 10 cards).
Missing the deadline. A bid submitted one minute late is a bid that goes in the trash. Plan to submit early.
No site visit. Plans show a clean, flat line. Reality shows a drainage ditch, three utility poles in the fence line, and soil that's 80 percent rock.

Accurate takeoffs are the foundation of winning commercial bids. FenceCalc lets you build section-by-section estimates that match the spec, so nothing gets missed.

Try FenceCalc free for 14 days →