Start from the load and the equipment, not a square-foot rule
A square-foot rule of thumb is how you mis-price a commercial job. The number starts with what the system actually has to do.
- The load, the cooling, heating, or refrigeration load drives the equipment size, and the equipment size drives most of the cost, get this wrong and every number after it is wrong too.
- The equipment and access, a rooftop unit needs a curb, rigging, and often a crane, refrigeration needs the line set and the condenser location, the access is a real line item, not a rounding error.
- The existing conditions, a retrofit in an operating kitchen is not a clean install, demo, working around service, and unknowns behind the walls all carry cost.
Price the system you actually have to install in the building you actually have to install it in, not the textbook version.
Build the number from the ground up
A real commercial price is built, not guessed. Every job is the same five buckets, and skipping one is how a profitable bid becomes a loss.
- Labor, the real hours, at your real loaded labor rate (wages plus taxes, insurance, and benefits), including travel and the slower pace of working around a live operation.
- Materials and equipment, the unit, the line set, the curb, the controls, the duct or refrigeration piping, at current cost, not last year’s.
- Subs and rentals, the crane, the electrician, the controls specialist, anything you are not self-performing.
- Overhead, the part one-truck pricing forgets, your shop, trucks, software, insurance, and office time all have to be covered by the jobs, every job carries a share.
- Profit, a deliberate margin on top of covered costs, profit is not what is left over, it is a line you add on purpose.
When the price is built from these five, you can defend every number to a facility manager and you know your floor. When it is guessed, you find out you were under on payday.
The commercial cost drivers generalists forget
The margin on a commercial HVAC or refrigeration job usually leaks through the same handful of line items a residential mindset leaves out.
- The make up air unit, on a commercial kitchen, the exhaust drives a make up air unit, and California Title 24 can trigger demand-control ventilation, if it is not in your bid your number is short.
- Refrigerant and code, the CARB and EPA refrigerant rules affect equipment choice, charge, and recovery, and the compliant option is not always the cheapest one, price the right system, not the wrong cheap one.
- Rigging, curbs, and access, getting a rooftop unit up and set is real cost, and a tight or occupied site multiplies it.
- Controls and integration, tying into a building management system or a walk-in control package is specialist time most generalists under-bid.
These are the line items that separate a commercial bid from a residential one. Catch them in the estimate, not on the job, and you stop donating margin to your competitors’ mistakes.
Protect the margin, markup, allowances, and terms
A built number is only worth what the terms around it protect. The last step is making the price hold.
- Markup vs margin, know the difference, a 20 percent markup is not a 20 percent margin, and confusing them is a slow way to go broke on busy work.
- Allowances and alternates, carry a clear figure for what is not finalized and price options separately, so a scope change is a line item, not a re-bid.
- Change orders, define how added scope is priced and approved in writing before the work proceeds, every time.
- Payment terms, know the deposit, the progress billing, and the retention before you sign, the job that pays in 90 days at a thin margin can cost you more than it makes.
The contractor who prices like a business, builds the number, charges the overhead, and protects it with terms, is the one who is still in business when the cheap bidders are not. That is the kind of license-verified commercial pro SearchLocalPro is built to match.