Most homeowners never look at a footing until something else goes wrong—a sticking door, a stair-step crack in stucco, a soft spot next to the garage. The footing is the widened concrete or masonry base that spreads the building’s load onto soil. When it is buried, you may only see a few inches of face at grade. When the lot steps down a hillside, more of it may be visible. Either way, there is a short list of damage patterns worth photographing before anyone digs or patches.
Our footing repair page covers the service side: how we evaluate footing and base-of-wall conditions, what City permits and soils triggers often look like, and how repair scopes get framed. This post is a spotting guide. It is not a remote diagnosis, and it is not a substitute for a foundation inspection. The companion post on coastal moisture and foundation drainage patterns explains the water paths that often sit behind the damage you can see.
A cracked wall is a symptom. A damaged footing is one possible source—among several. The job of a spotting pass is better questions, not a repair shopping list.
What you are looking at (code literacy, not a report card)
California Residential Code Section R403 describes how exterior walls are supposed to be supported: on continuous solid or fully grouted masonry or concrete footings, or other approved systems, designed to carry loads into the soil. Footings sit on undisturbed natural soil or engineered fill. For concrete footings, the code’s common minimums are at least 12 inches wide and 6 inches thick, with exterior footings placed not less than 12 inches below undisturbed ground—subject to tables, soil bearing, and site-specific design.
Older La Jolla houses were not all built to today’s tables. Treat the code language as a vocabulary for what a footing is supposed to do, not as a pass/fail test of a 1950s or 1970s house. La Jolla is part of the City of San Diego; Building Permit rules apply on City parcels. Foundation systems vary by era and topography. This site will not invent a single “typical La Jolla footing.”
Where homeowners can actually see a footing
You will not see the whole footing on most lots. Useful viewing spots include:
- Crawl-space perimeter, looking out at the inside face of the stem wall and the top of the footing where soil has settled away
- Exterior grade reveal, where landscaping or erosion has exposed the footing face
- Garage stem and apron joints, where the house footing meets flatwork
- Hillside step footings, where the lot drops and each step of concrete is visible from the side yard
- Isolated pier pads under posts in a crawl or under a deck
If you cannot see the footing at all, that is normal. Document the symptoms above (doors, floors, wall cracks) and the drainage conditions around the perimeter instead. Do not dig exploratory trenches on a whim—utility locates, shoring, and permit questions exist for a reason.
Damage patterns worth photographing
None of these, alone, proves the house is unsafe. Together with dates and context, they help an evaluator.
Spalling and delamination
Loose, flaking, or broken concrete on the footing face. Often starts as a soft patch or a hollow-sounding area. Coastal air and repeated wetting dry cycles make exposed faces more vulnerable once the surface paste is damaged. Spalling matters more when it is deep enough to change the section of the footing or to open a path to steel.
Rust stains and exposed reinforcement
Orange-brown streaks, raised rust scale, or bars you can see. Steel needs concrete cover. Once cover is gone and salt-laden moisture reaches the bar, corrosion expands and pushes more concrete off. Photograph with a ruler. Note whether the stain is active (fresh, wet) or old and stable in appearance—still not a diagnosis, but useful.
Undermining and edge voids
A gap under the outer edge of the footing, soil washed away, or a hollow you can see from the side. Concentrated downspouts, broken irrigation, and reverse grade are common contributors. This is one of the clearest links between the drainage companion post and footing damage: water that scours soil removes support at the edge.
Cracks through the footing
Hairline map cracks in concrete can be shrinkage. Cracks that show vertical offset (one side higher), that open and close seasonally, or that grow over months deserve more attention. Stair-step patterns in masonry stem walls that continue into the footing line are worth documenting with elevation context. Our earlier post on hairline vs structural foundation cracks covers crack reading more broadly; here the focus is the base, not every wall crack in the house.
Stem-to-footing separation
A horizontal gap or step where the stem wall meets the footing, or daylight showing through a joint that used to be tight. Sometimes it is a cold joint that always looked that way; sometimes it tracks movement. Photos from the same angle six months apart help.
Pier and pad problems under posts
Tilted pads, crushed corners, posts that no longer bear fully, or wood posts with rot at the concrete interface. In a crawl space, take wide shots that show several piers in one frame so an evaluator can see pattern versus one bad post.
Clues above that often pair with footing trouble
Sticking doors and windows, sloping floors, and wall cracks that cluster on one side of the house do not prove footing failure—but they are reasons to look at the base on that side. See uneven floors measurement and sinking foundation early signs for above-grade pattern literacy. Settlement repair framing lives on foundation settlement repair; crack repair framing on foundation crack repair.
A photo protocol that actually helps
- Wide shot of the wall or pier line so location on the house is obvious.
- Close-up with a ruler or tape in frame.
- Date and weather note (rained yesterday / foggy week / irrigation day).
- Downspout and grade notes in the same email or album—where water arrives at this corner.
- Repeat after the next big storm if the first set showed a void or active rust.
Avoid patching over active spalls with cosmetic coatings before someone has looked. Coatings can hide the edges an evaluator needs and do not restore lost section or soil support.
When to stop watching and get an evaluation
Monitoring is reasonable for fine, stable, non-offset cracks with no voids and no corrosion. Move sooner toward an evaluation when you see:
- Growing offset or a crack that is clearly wider than last season
- Soil missing under a footing edge
- Reinforcement exposed and heavily rusted
- Sudden change after heavy rain, a nearby excavation, a plumbing break, or an earthquake
- Posts that have lost bearing or crawl-space supports that look crushed
Those are triage prompts, not City pass/fail thresholds. San Diego does not publish a homeowner crack-width chart that replaces professional judgment.
Moisture, soils, and permits (short version)
City Information Bulletin 141 explains when fill or expansive soil triggers a geotechnical report with building plans. The CalGeo expansive-soil guide reminds homeowners that moisture change drives volume change. If edge water is part of the story, fixing the water path usually belongs in the same conversation as repairing the concrete—otherwise the next storm can restart scour. Drainage literacy is in the companion post and on the foundation drainage hub.
Structural footing repair or alteration generally needs a City Building Permit (SDMC §129.0202). Historic review can apply on older structures when exterior work is permitted. Coastal Overlay and steep-hillside rules are parcel-specific. When stamped plans or soils work are required, La Jolla Structural evaluates the condition and we coordinate with licensed engineers as needed. Underpinning and related methods are explained for homeowners in underpinning explained and on the foundation underpinning hub—this spotting post does not sell a method.
Cost factors, not prices
We do not publish footing repair prices. Factors that shape scope include how much excavation and access the edge needs, whether drainage corrections are bundled, how much of the footing section is lost to spall or corrosion, whether settlement underpinning enters the design, investigation needs (elevations, soils, plumbing), and which permits or overlays apply. Cost-factor literacy continues in what drives foundation repair cost.
Practical next step
If you can see spalling, rust, a void under the edge, or an offset crack at the footing, photograph it with a ruler and note the water path at that corner. If you cannot see the footing, document the above-grade symptoms and the perimeter drainage instead.
Request a Free Quote for an on-site evaluation anywhere in La Jolla, or call (650) 739-6537. Bring the photo set. Pair this read with coastal moisture and foundation drainage patterns when water is part of what you are seeing.
Sources (accessed October 6, 2026)
- California Residential Code, Section R403 Footings
- California Residential Code / San Diego Residential Code, Section R401.3 Drainage
- City of San Diego Information Bulletin 141, Soil Bearing Capacity
- California Geotechnical Engineering Association, Coexisting with Expansive Soil: An Informational Guide for Homeowners (2013)
- San Diego Municipal Code §129.0202 (Building Permit)