How to replace a wood gate with a metal gate

To replace a wood gate with a metal one, measure the opening, take out the old gate and any wood post at the house, set a metal post in concrete or fix one to the wall, then hang the gate with an even gap and fit the latch. As of 10 November 2026 no statewide rule requires the swap. California’s Zone 0 rule, adopted 19 August 2026, is not in effect.

Under the adopted text, a gate attached to a house would need a 5 foot noncombustible span, and the Board’s rule summary names this job as its example: “replacing a wooden gate with a non-combustible metal gate.” For the rule itself, see Zone 0 gate requirements.

Do I have to replace my wood gate now?

No. The Board filed the rule with the Office of Administrative Law on 28 August 2026 (file 2026-0828-03E) and withdrew it on 8 September 2026, and OAL’s review list had no Board of Forestry entry on 10 November 2026.

Once the rule takes effect, existing homes in local Very High Fire Hazard Severity Zones get 3 years, or up to 5 on a local timeline (14 CCR 1298.04(c)(4)). In the State Responsibility Area it is 5 years, or a timeline the CAL FIRE Director sets that cannot be less than 3 years (14 CCR 1299.03(e)(4)). From the effective date, “no new Combustible fences or gates” could go in within 5 feet of the house (1298.04(b)(9)(B)). In our reading, a new wood gate bought to replace a rotten one would count as new, so any gate you hang at the house after that date would have to be noncombustible.

San Diego already has local rules. Its Zone 0 Guidelines (Rev. 4/22/2026) say homeowners “should attempt to achieve full compliance” by 28 February 2029, which “includes replacing fences and gates that do not comply.”

What do I need before I start?

Jerith’s instructions list stakes, string, a tape measure, a level, a post hole digger, concrete mix, a rubber mallet, a hacksaw and a hex-head driver. Add a saw and pry bar for the old post, and a drill with a masonry bit for a wall mount. Two checks come first:

• Utilities. California’s dig law requires an excavator to notify the regional 811 center “at least two working days, and not more than 14 calendar days, before beginning that excavation” (Gov. Code 4216.2(b)). Section 4216.8 exempts a homeowner doing permit-free work at their own principal residence, though not a contractor you hire.
• Permits. The 2022 California Residential Code exempts “Fences not over 7 feet (2134 mm) high” from a building permit (CRC R105.2, per the City of Lathrop’s handout). Check your city’s current exemption list and its zoning rules on fence height.

Step 1: How do I measure the opening?

Measure the clear width between the house wall (or the existing post) and the far post at the top, middle and bottom, and use the smallest number. Jerith’s instructions say the opening between posts “should equal the size of the gate that was ordered,” and that a proper install leaves about ¾ inch between the gate and each post. Jerith sets gates about 2 to 3 inches above the ground.

Step 2: Does the new gate cover the first 5 feet?

Measure along the fence line from the house wall. Once in effect, the adopted rule would require “a five (5) foot Noncombustible span from the point of attachment or the point closest” to the house, for any fence or gate that is attached or that comes “within one (1) foot of contact” (1298.04(b)(9)(A); 1299.03(d)(9)).

• Gate at the wall, 5 feet or wider. The gate and its posts cover the span.
• Gate at the wall, narrower than 5 feet. The latch post would need to be metal too, plus a metal filler panel or second post out to the 5 foot mark. Our metal gate on a wood fence page covers that joint.
• Gate more than 5 feet out. It is outside the span; the fence between it and the house is what would change.

The Board’s guidance says to “prioritize upgrading the five feet of wood fence or gate that touches the house with a noncombustible panel or gate.”

Step 3: Should the new post go in concrete or on the wall?

For Zone 0, what matters is that the post is metal. The adopted text says “Combustible fences and gates shall not be attached to an Occupied Structure” (1298.04(b)(8)), so a metal gate on a wood post at the wall would leave wood at the attachment point.

• Post in concrete next to the house. No holes in the siding. In our reading, a post within 1 foot of the wall still counts as the start of the span, which is fine when it is metal.
• Wall-mounted post. Globus Gates’ gate kit page says one post “handles wall or concrete footing,” the “2-way post is wall mount only,” and a gate that hangs between two walls should use its hinge post and L-side post set. How to fix one to stucco, block or siding is on our attach a metal gate to a house wall page.

Buy a gate post for the hinge side. Jerith says its gate post is the same as an end post “but the post walls are twice as heavy to support the weight and latching of a gate.” Globus adds that “A solid leaf takes more wind load than an open one, so match post and footing to your site and local code.”

Step 4: How do I remove the old gate and post?

Take the gate off its hinges, then remove the hinges and latch. If the old post is fastened to the house, back out the fasteners and seal the holes in the stucco or siding. Cut the fence rails free and pull the post; if it is set in concrete, dig out the footing or set the new post in a fresh hole beside it. The wood fence beyond the 5 foot mark can stay: the adopted text bars only new combustible fences within 5 feet of the house (1298.04(b)(9)(B)) and allows repairs to an existing one “using Combustible replacement materials” (1298.04(b)(9)(C)).

Step 5: How do I set the new post?

Follow the post maker’s depth chart. Jerith’s minimum post depth is 18 inches for 36, 48 and 60 inch fences and 24 inches for a 72 inch fence. Its other steps:

• Put the post caps on before setting posts in concrete.
• Fill the hole with concrete and leave it “about 2” below ground level.”
• “The proper operation of the gate depends upon the correct installation of the gate posts. Make certain that they are plumb.”
• Hang the gate only “after the concrete has set.” Globus Gates suggests temporary bracing “until concrete cures.”

Step 6: How do I hang, adjust and latch the gate?

From Jerith’s gate steps: mount one hinge near the top rail and one near the bottom rail, and line the hinges up with each other, because “If the hinges are not in line with each other, the gate will not close by itself!” Self-closing hinges adjust about a quarter turn at a time, with “equal tension on both hinge springs.” Fit the latch to its own instructions and test that the gate swings clear and latches by itself. The rule has no separate clause for hardware, so ask your local fire agency about any plastic or wood parts.

How long does it take, and when should I hire it out?

Ergeon’s 2023 gate cost guide says a professional job “can usually be done in one day, in anywhere from four to eight hours.” Inch Calculator says two workers may need a full day for a garden gate.

Hire it out if the post mounts to stucco or block and you have not drilled masonry, or if the opening needs a custom width. One San Diego County contractor prices a Zone 0 aluminum section with a gate from $3,000 (JJ’s Fence Company, undated page, accessed 10 November 2026). Our metal gate cost page has kit and installed prices, and the how to comply with Zone Zero guide covers the rest of the 5 foot zone.