Garage construction: a guide for pros

What customers ask, how to win the job, and what to put on your profile.

Offering garage construction

You build detached and attached garages, from the slab and framing through the roof, electrical rough-in and garage door. Customers hire you for correct setbacks, sound framing and a door that works smoothly and safely.

What customers ask

Does the design meet the setbacks, and who confirms them before the slab goes in?
How will the attached roof tie into my house roof without leaks?
What size door can the header and framing support?
Can the garage have a workshop with enough electrical service?
Who pulls the permit, and what inspections happen?
What warranty do you give on the slab and the door install?

How to win the job

On the first call, ask for the lot survey, the desired door size, the use of the space and whether it will be attached, then confirm the setbacks before you quote
Walk the site and mark the utility lines, the slope and the drainage path before you bid the slab
List the slab thickness, the reinforcement, the vapor barrier and the slope in the quote so the owner sees the base being built
Specify the header size, the framing grade and the roof tie-in method in the proposal, and say who does each
Put the electrical scope on its own line, with a note that a licensed electrician performs the work and the panel check
Offer to install the garage door yourself with the opener and sensors, and show the safety reverse test in the handover

What to put on your profile

Post photos of slab pours, framed door openings and finished roofs, labeled with the garage size and the roof type
List the door types and openers you install, including insulated and smart openers
Show attached and detached garages, with the tie-in details where the roof meets the house
State whether you run electrical work or hire a licensed electrician for it

Follow-up that helps the customer

Offer a yearly check of the door balance, the tracks and the safety sensors
Suggest a sealing and drainage check at the slab edge and the threshold after the first wet season
Mention a workshop electrical plan if the owner plans to add tools or heat later

Licenses and permits

Garage builders are commonly required to hold a general contractor license or registration, and electrical work must be done by a licensed electrician in most places. A building permit is typically required for the structure. Check with your state and local licensing agencies and your local building department before you take the job.

Questions

How do I handle a setback question I did not catch at bid time?

Stop before the slab is poured, measure the building to the lot line and show the owner the result in writing. Do not pour until the setback is confirmed and any change is approved.

What door size should I quote for a two-car garage?

Ask the owner which vehicles and what storage they need, then recommend a door width and height that clears the vehicles and the opener. Confirm the header size and the framing will carry the span.

How do requests reach me on infinibell?

Customers describe the job and pick the pros they want by name, and only the pros they picked see the request. Joining is free. You pay only for the leads you accept, and you can decline a request for free. Every pro is reviewed before going live.

About this guide

This national guide is written and checked by infinibell. Rules and conditions differ by place, so local pros are credited on guides for the cities they serve, not on national ones.

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Oct 29, 2026: Drafted by infinibell to our content guidelines.

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