Gate installation: what to know

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

What gate installation is

Gate installation hangs a walk or drive gate on sturdy posts with proper hinges, a latch and a drop rod, and aligns it so it swings freely, closes securely and does not sag over time. Most gate problems start at the posts and hinges, so the installation depends on setting the hinge post right before the gate is hung.

Signs you need it

  • A fence line has a gap where a gate is needed for access to the yard, the side or the driveway
  • A walk gate is needed for a garden, a side yard or a pool area that must stay closed
  • A drive gate is needed to secure the property or to match a new fence line
  • You want a gate that keeps animals or children in or keeps wildlife out of a yard
  • An old gate has been removed or broken, and the opening needs a new gate hung on proper posts
  • A gate is needed for a pool enclosure that must latch on its own when it closes

What the pro does

  • Mark the gate opening and check the swing path so the gate clears the ground, the walk and the other fence sections
  • Set the hinge post and the latch post in concrete at the depth the gate weight requires, and brace them until the concrete cures
  • Build or fit the gate frame with a diagonal brace, so the frame stays square under its own weight
  • Mount the hinges on the frame and the post, with heavy-duty hardware sized to the gate
  • Hang the gate, set the gap at the bottom, and install the latch and the drop rod or the stop
  • Check the swing, the latch and the closing action, and adjust the hinges so the gate closes without help

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Every job is different, so we do not publish prices.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.

  • Gate width and weight, since wide drive gates need heavier frames, hinges and posts
  • Gate material, such as wood, vinyl, aluminum or steel, each of which has different framing needs
  • Hinge post depth and the concrete used, which depend on the gate weight and the soil
  • Latch type, such as a gravity latch, a keyed lock or a self-closing and self-latching system
  • Ground conditions, slope and any rock or buried lines that change the post setting
  • Connection to an existing fence, including trimming, matching the height and fitting the posts into the line

What a written quote should spell out

  • Gate width, height, material and the frame design named in the proposal
  • Hinge type, number and the post sizes for the hinge and latch posts
  • Concrete depth and the post setting method, with the bracing used
  • Latch and hardware, including any drop rod, stop or self-closing device
  • Gap adjustments and any alignment work included in the install
  • Warranty on the frame, the hardware and the workmanship

Questions to ask before you hire

  • How deep are the hinge and latch posts, and how are they braced?
  • What hinges do you use for the gate weight, and will they hold up for years?
  • How do you keep the gate from sagging over time?
  • Will the gate close and latch by itself, and what latch do you recommend?
  • What is the gap at the bottom, and how does the gate clear the ground on a slope?
  • What is the warranty on the hinges and the frame?

Red flags

  • Hangs a heavy gate on a single post set shallow in the ground
  • Uses light hinges on a wide drive gate that will sag within a season
  • Builds the frame with no diagonal brace, so it racks out of square
  • Leaves a gap at the bottom that is too big or too small for the ground
  • Says the latch will hold the gate closed without checking the post or the frame

What you can do yourself

A homeowner can hang a light walk gate on posts that are already set firmly, using the right hinges and a diagonal brace. Call a pro for drive gates, heavy gates, posts that must be set in concrete and any gate that is part of a pool barrier. Heavy gates can crush fingers and fall on people, so use two people to lift and hold the gate while it is hung.

Licenses and permits

Whether gate installation needs a contractor license varies by place and by job size, and drive gates, pool barriers and gates tied to electrical systems may need a permit in many areas. Check with your state or local licensing agency and your local building department before work starts, especially for a gate on a public way.

Gate installation questions

Why does my gate sag or drag on the ground?

Sagging usually comes from a hinge post that is not deep enough or braced well, or from a frame without a diagonal brace. A pro can add a brace, reset the post or change the hinges to fix the swing.

How do I make a gate close by itself?

A self-closing hinge or a spring device can close the gate, and a self-latching latch can catch it. Ask the pro which combination suits your gate, since a pool gate often needs both.

Can a gate be hung on an existing fence post?

Only if that post is set deep and solid enough to take the gate weight and the swing. Ask the pro to check the post first, since a post that is weak at the ground line will not hold a gate.

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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