A leaning San Diego fence is often a below-grade problem: the concrete footing cracked or moved, or the wood post rotted inside a footing that is still sound. Those are different repairs. A useful proposal names which posts get which treatment, how old concrete is removed, and how the new post is set.
Fence Pros San Diego is a referral service. We do not pour footings, employ crews, or publish per-post prices.
Why footings crack or move here
A typical residential post sits in a hole filled with concrete. Several local conditions can undo that.
Clay that swells and shrinks. Parts of inland San Diego County have expansive clay. Wet seasons swell it. Dry seasons shrink it. That cycle can crack a shallow or poorly drained footing. Sandy coastal soils are a different failure: water can wash fines away from the hole.
Water at the base. Poor drainage, irrigation spray, or a downspout at a post keeps the soil wet. That speeds wood rot at grade and can erode support around the concrete. Freeze-thaw is uncommon here. Do not treat it as the main San Diego mechanism.
Original installation. A hole that is too shallow, a weak mix, or a post that never sat on drainage rock can fail early. County PDS 070 lists wood-post and chain-link footing notes as recommendations only, including 12-inch-diameter concrete extending at least 24 inches into undisturbed ground or compacted fill, over 3 inches of loose gravel. That bulletin is not a City of San Diego recipe and not a promise that 24 inches is enough on every lot.
How a contractor separates a bad footing from a rotten post
Press near grade. If the concrete mass rocks with the post, the footing is in the conversation. If the post wobbles while the concrete stays put, the wood inside is the first suspect. A pro still has to dig or probe to confirm. Photos of the lean, the base, and nearby drainage help the first conversation. They do not replace an on-site look.
Other posts on the same run matter. Fixing one leaf of a line while the next post is already moving only delays the next call. See leaning fence repair.
Resetting a footing while keeping a sound post
When the post is still solid and the concrete has failed, the usual sequence is: locate utilities, excavate and break out the old mass, plumb and brace the post, pour a new footing, crown the top so water sheds, then leave braces on until the mix has set. The written scope should name hole size, mix, whether old concrete leaves the site, and how adjacent panels are supported during the work.
Do not treat “24 to 30 inches” as a verified San Diego residential standard. Ask the contractor to write the depth they propose for this soil, fence height, and wind exposure. For unincorporated parcels, they can use PDS 070’s wood-post notes as a starting recommendation and still engineer to the site.
Replacing a rotten post in a sound concrete base
If the wood is gone at grade and the footing is intact, the contractor may cut the post, extract the stub from the cavity, and set a new post with grout, epoxy, or new concrete in that void. The scope should say how the stub comes out without shattering the old footing, and what product fills the gap.
A post-saver sleeve or end treatment is a product choice. Put the name on the proposal. It is not a warranty from Fence Pros.
When the whole post and footing come out
If both the wood and the concrete are gone, or the hole has eroded, the cleaner repair is full removal and a new set. That is more excavation and more disposal. Compare it in writing with a reset or a stub replacement so you are not paying for a rebuild described as a “footing tweak.”
California’s C-13 fencing classification covers posts, fences, and gates. It excludes masonry walls. A block pilaster or masonry stem is a different license on the bid.
If the line is a shared boundary, Civil Code section 841 requires 30 days’ written notice before you incur shared-fence costs, unless a written agreement already covers the work.
Permits
Repairing a few posts is not automatically exempt. Like-for-like height and location often follow the same desk as new work in that city.
City of San Diego. Table 142-03A splits the fence-division building permit at 7 feet. Changing height, moving the line, or attaching to a retaining wall can change the path. Section 142.0310 still governs yard height even when that division does not require a permit.
Unincorporated County. PDS 070 requires a building permit except qualifying fences and freestanding masonry walls not exceeding 6 feet that meet zoning.
Other cities. Ask that city’s building or development desk. See permits by city.
Fence Pros does not decide whether your repair needs a permit.
Frequently asked questions
How much does fence post footing repair cost in San Diego?
This site does not publish per-post bands. Ask for an itemized proposal: number of posts, old-concrete removal, new depth and mix, and whether panels come off.
How do I know if the footing failed or the post rotted?
If the concrete rocks, suspect the footing. If the post moves and the base does not, suspect the wood. A licensed contractor confirms it on site.
How deep should footings be?
There is no single verified depth for every San Diego lot. Unincorporated PDS 070 recommends at least 24 inches into undisturbed ground or compacted fill for its wood-post notes. Confirm with the contractor and the desk for the address.
Do I need a permit to repair footings?
Ask the authority for the parcel. Do not assume a small repair is exempt, especially if height or location changes.
Can I plumb a leaning post without a new footing?
Sometimes, if the post is sound and the hole can be recast. A badly cracked mass or an eroded hole usually needs a full reset.
When to call us
If posts have moved, concrete is rocking, or wood is soft at grade, call (858) 400-4906. We will connect you with a licensed independent fence contractor. You contract with that professional directly. Related: fence post repair and fence repair.