Carport installation: what to know

What the job involves, what changes the price, and what to ask a pro.

What carport installation is

Carport installation puts up a roofed, open-sided structure over a vehicle by setting posts or anchors, fixing a metal or wood frame and roof panels, and securing the whole thing against wind and snow. Homeowners install carports to shelter cars, boats and equipment without building a full garage.

Signs you need it

  • Your vehicles sit in sun, rain or snow, and the paint, the glass and the interior are wearing faster than they should
  • You need covered parking for a second vehicle or a boat, and you have room beside the house or the driveway
  • An old carport has sagging panels, bent frame members or loose anchors after a storm
  • You want a carport that can be sited where the local setbacks and the view from the street allow
  • Your driveway or the slab has a spot that suits anchors, and you want the carport fixed to the ground properly

What the pro does

  • The installer checks the site for level, the soil and the position of buried lines and utilities before any hole is dug
  • They set the posts in concrete footings or fix them to the slab with base plates and anchor bolts
  • They fix the beams and rafters or the metal frame, and square and brace the structure
  • They install the roof panels or the shingles, with the screws and the sealing washers placed for wind uplift
  • They check the frame for level and the fasteners for tightness, and confirm the structure is anchored for the wind and snow load
  • They finish with trim, gutters if included, and a walk-through showing the anchor points and the load limits

What changes the price

Every job is different, so we do not publish prices. These are the things that move the quote up or down.

  • Size and roof span, since a double-car carport needs heavier beams and more posts than a single-car unit
  • Frame material, such as galvanized steel, aluminum or treated wood, and the gauge or grade chosen
  • Anchoring method, whether it is set in concrete footings, fastened to an existing slab or fixed with ground anchors
  • Roof type and pitch, from metal panels to a shingled roof
  • Snow and wind rating for the site, which sets the number of posts and the bracing
  • Site preparation, including removal of old structures and grading
  • Add-ons such as gutters, side panels, lighting or a storage room

What a written quote should spell out

  • Carport size, post height, roof pitch and the snow and wind rating the frame is built for
  • Anchor type and whether footings are poured or the posts are anchored to a slab
  • Frame material, its gauge or grade, and the finish or coating
  • Roof panel or shingle type, with the fastener and sealing details
  • Gutter and downspout scope, if included, and where the water will drain
  • Who handles any permit or setback check, and whether the installer confirms it

Questions to ask before you hire

  • What snow and wind rating is this carport built for, and does it meet my local load requirements?
  • How will the posts be anchored, and does the anchor suit the slab or the soil here?
  • Does the carport need a permit or a setback check, and who handles it?
  • Will the roof panels or shingles be fastened to resist uplift in a storm?
  • How will the carport be braced at the corners and the beams?
  • Where will water run off the roof, and does it land on a neighbor's property or the driveway?
  • What warranty covers the frame, the roof and the anchors?

Red flags

  • They anchor the posts into soft soil or onto a slab with no fasteners rated for the load
  • They do not state a snow or wind rating for the structure
  • They use undersized frame members or fewer posts than the span needs
  • They cannot tell you where the roof water goes or whether it will cause a problem for the neighbors

What you can do yourself

Many carports sold as kits can be assembled by two people following the manufacturer's manual on a level site. Check the local setback and permit rules first, and locate buried utilities before digging. Do not set posts into concrete footings in an unknown soil without a professional's check, and do not work on the roof or raise a long beam alone.

Licenses and permits

Carports are often installed under a general contractor or handyman registration, and many areas require a permit for a permanent structure of this type. Check with your state or local licensing agency and your local building department for permit, setback and wind-load rules that apply to your property.

Carport installation questions

Do I need a permit for a carport?

Many areas require one for a permanent carport, especially if it is attached to the house or has a large footprint. Ask the local building department before you order the kit or book the install.

Can a carport survive a heavy snow load?

Only if it is built for the snow load in your area. Ask the installer for the rating, the number of posts and the bracing, and whether an engineer's data supports the design.

Can I attach a carport to my house?

Yes, but an attached carport ties into the house structure and the roof. Ask the installer how the ledger or the attachment is fastened and how the roof water will be handled where the two meet.

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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