Building pads, driveway cuts and perimeter walls on Jamul’s rock and clay — engineered where the County requires it, drained so they stay put, and noncombustible next to the house. One licensed mason from site walk to final inspection, based next door in Alpine.
CSLB #979389 · C-29 Licensed · Bonded $25,000 · Free on-site estimates
Jamul walls by the numbers
Jamul is almost all detached, owner-occupied homes on large parcels — 95.8% single-family detached by the Census Bureau’s count — so the walls here hold up house pads, driveway cuts and terraced yards rather than a few feet of tract backyard. A 2018 soils investigation filed with the County for a site off Jefferson Road shows what they sit in: a clay layer tested at an expansion index of 71, more than three times the 20 at which the California Residential Code calls soil expansive, over tonalite that stopped a backhoe 2.5 to 6.5 feet down.
That combination decides the build. Clay that swells can’t go behind the wall, so backfill is imported; rock that won’t dig gets priced before the first trench; and because a pad wall almost always has sloping ground or a structure behind it, the County’s permit exemption rarely applies. Add fire country — the 2007 Harris Fire burned 90,440 acres along the SR-94 backcountry — and the last few feet of wall next to the house are built in block or stone, not wood.
From a first pad wall on a new parcel to a stone entry at the foot of the drive. Countywide detail is on our retaining wall and block wall pages; this is how the work goes here.
Building pads
Reinforced, fully grouted CMU or poured concrete walls that create a level pad for a house, garage, barn or yard. Footings bear on the dense weathered rock where the soils report puts it, steel is set to the engineer’s schedule, and the drain goes in before a shovel of backfill.
Driveway cuts
Where a drive climbs from Lyons Valley Road or Proctor Valley Road to the house, the cut bank needs holding. These walls carry vehicle load on top — a surcharge — so they are engineered and permitted every time, and where the drive meets a County road the apron needs its own encroachment permit.
Perimeter & privacy
Freestanding CMU walls to the County’s masonry fence table: a 6-foot wall in 8-inch block on a 24-inch-wide, 8-inch-thick footing with #4 bars at 24 inches, every cell grouted. Up to 6 feet and within the zoning heights, no building permit is needed.
Fire-safe
County rules require any fence within 5 feet of a building to be noncombustible or approved fire-retardant. We build that last 5 feet — where a wood fence used to meet the house — in block or stone, which also matches the State’s new “Zone 0” direction against combustible fencing attached to homes.
Stone & entries
Natural or manufactured stone over a reinforced block core for entry walls, gate pilasters and mailbox columns at the foot of a drive — the look most Jamul properties use at the road.
Repair
Older pad and garden walls on Jamul lots were often backfilled with the clay that came out of the cut — exactly what the Jefferson Road soils report warns against. When one bulges or weeps, we dig out behind it, replace the clay with granular fill around a wrapped drain, and rebuild any section that has moved too far.
The Jefferson Road soils report is explicit: soil with an expansion index over 50 — “which includes the predominant on-site material” — should not be used as backfill behind retaining walls. It specifies a 12-inch gravel drain wrapped in filter fabric around a perforated pipe, and gives allowable bearing of 3,000 psf in dense bedrock against 2,000 psf in compacted fill. Every Jamul lot gets its own look, but that is the detail we start from.
Rock cuts both ways. A footing on weathered tonalite is about as good as bearing gets, but the same report describes excavation as “moderate to difficult effort using large excavating equipment” with cobble-size rock. We price the rock up front instead of finding it on day two.
There is no city here. Jamul and Dulzura are unincorporated, so the County of San Diego Planning & Development Services issues every wall permit. A retaining wall is exempt only if it passes all five conditions in County Code Sec. 91.1.105.2(a)(7), and if the job needs a grading permit, Sec. 91.1.105(c) requires a building permit for all retaining walls and drainage structures on it.
Freestanding block walls follow the zoning heights in PDS 070: 42 inches in a front or exterior side yard, 72 inches in a rear or interior side yard, and no building permit up to 6 feet — except pool barriers, which always need one. Larger projects that go to discretionary review may also be heard by the Jamul/Dulzura Community Planning Group.
Four common jobs, the County rule each one meets, and what changes on Jamul ground.
| Wall | County permit? | What decides it | Jamul detail |
|---|---|---|---|
| Garden wall, level yard, 2 ft | Usually exempt | Passes all five PDS 110 conditions | Still drained; still no clay backfill |
| House-pad wall, slope above | Yes | Sloping backfill is a surcharge | Footing to rock; imported backfill; engineer’s steel |
| Driveway cut wall | Yes | Vehicle load on top | Often part of a grading permit with the drive |
| 6-ft block privacy wall, rear yard | No building permit | ≤6 ft, within the 72-in rear-yard height | PDS 070 footing and rebar table |
“Usually exempt” means the wall as described meets the County’s conditions; we confirm every wall against them before quoting.
Shaun looks at the slope, what sits above and below the wall line, and where water will go — and tells you on the spot whether the wall looks exempt or permit-bound.
For pad and driveway walls, a soils report and engineered design. If you already have a geotechnical report from your grading or house permit, we build from it.
We prepare and submit to County PDS, or fold the walls into your grading permit. Encroachment permit too if anything touches a County road.
Dig to the bearing layer — rock where it’s there — set steel, and pour. Rock excavation is already in the price.
Lay and grout the block, place the fabric-wrapped gravel drain and pipe, then imported granular backfill in compacted lifts.
Cap, stucco or stone veneer, County inspection sign-off, and a written workmanship guarantee.
Planning one? Shaun will walk the site with you and tell you what it needs — free, no obligation.
Call (619) 581-2492The first rows are the San Diego County ranges on our retaining wall and block wall pages. In Jamul the swing factors are rock, imported backfill and engineering — each shown as its own line on the proposal.
| Project | Typical range |
|---|---|
| CMU retaining wall, under 4 ft | $35–$60 per sq. face ft. |
| Engineered CMU retaining wall, 4–8 ft | $60–$140 per sq. face ft. |
| Natural stone retaining wall | $80–$250 per sq. face ft. |
| Stucco-finished block wall | $100–$200 per linear ft. |
| National average, 25 × 4 ft block retaining wall (Fixr, 2025) | $5,463 |
| County encroachment permit (apron or wall in road right-of-way) | $217 fee |
Our ranges are for comparison, not a quote; the Fixr figure is a national cost-guide average, not a San Diego price. Engineering, County plan-check fees, rock excavation and imported backfill are priced separately on every Jamul proposal.
Same County rules everywhere on this page; different ground and different jobs from one end of SR-94 to the other.
The Jamul page covers the ground, permits and neighbourhoods across every kind of job. The county-wide pages go deeper on the build itself.
Straight answers before you hire. Anything else — call, and Shaun answers it himself.
Call (619) 581-2492Only if it fails one of the County’s five conditions: 3 feet of soil or less measured from the top of the footing, 6 feet or less in total height, level backfill, no structure within 6 feet, and no surcharge. A 2-foot garden wall in a level yard usually passes. A 2-foot wall with a slope or a driveway above it does not.
Not the clay. A County-filed soils report for a Jamul site measured an expansion index of 71 and said soil over EI 50 should not be used behind retaining walls. We backfill with imported granular material around a fabric-wrapped gravel drain; usable on-site rock and sandy soil can go elsewhere on the lot.
Under the County zoning ordinance, 42 inches in a front or exterior side yard and 72 inches in a rear or interior side yard. Freestanding masonry walls up to 6 feet need no building permit — pool barriers excepted.
Rock, backfill and engineering. Hard weathered rock a few feet down means bigger equipment; clay that can’t go behind the wall means trucking in backfill; and pad or driveway walls usually need an engineered, permitted design. We show each as its own line so you can see where the money goes.
Not the last 5 feet. County rules require any fence within 5 feet of a building to be noncombustible or approved fire-retardant, and the State’s new “Zone 0” rules adopted in August 2026 push the same way. We build that section in block or stone.
Usually, yes. A pad wall with sloping ground or a structure above it is engineered, and the engineer designs from soils data. If your grading or house permit already has a geotechnical report, we build from it; if not, we arrange one before design.
Yes — California C-29 Masonry licence #979389, issued 14 December 2012, with a $25,000 contractor bond. Check it at cslb.ca.gov under “Check a License”.
Call Shaun at (619) 581-2492 or send the form. He’ll walk the slope with you, tell you whether the County will want a permit, and put a written, itemised price in your hands — excavation, backfill and engineering shown line by line.
