A steep drive that grips in the rain, a slab that doesn’t crush the septic tank, footings that sit on rock instead of loose DG. Shaun pours for hill lots, and he checks the fire-access numbers and the septic layout before the forms go in.
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Hill-lot concrete by the numbers
Crest has two main ways out — La Cresta Road and Mountain View Road — and the County’s community plan calls a third “a high priority”. Inside the villages, the plan describes narrow, sometimes unpaved lanes, and in Harbison Canyon, roads that “simply appear to end up as private driveways”. That makes the last stretch to many houses a private drive, and on a grading plan the County Fire Authority checks it like an access road: at least 16 feet wide for a drive serving one or two homes, 13 ft 6 in of clear height, a grade no steeper than 20% and no more than 12% where the drive breaks over into the road or the pad.
Underneath, the septic system sets its own limits. The County keeps leach lines 8 feet from driveways and requires a traffic-rated tank, or an engineered slab, anywhere vehicles pass within 5 feet of one. And where the drive meets La Cresta Road, the plan asks for strict adherence to County road standards — which, with a Public Works encroachment permit, is how we build every apron onto a County road.
Driveways, slabs, steps and the footings under every wall we build. The county-wide detail on mixes, finishes and jointing is on our concrete page; this is about pouring it on a hill, over decomposed granite, beside a septic system.
Driveways
Broom-finished concrete with the texture running across the slope, control joints laid out to the bends, and a base compacted on firm ground. Where a section passes 15%, the steep band gets the finish perpendicular to travel that the County Fire Authority looks for.
Road
Where your drive meets La Cresta, Mountain View, Harbison Canyon or Dehesa Road, the apron is built in the County right-of-way, so it goes on a DPW encroachment permit and a DigAlert ticket. We handle both.
Upgrades
Plenty of drives here are still graded decomposed granite or patched asphalt — one Harbison Canyon fire plan describes exactly that and calls for an all-weather surface. We replace them in stages if the budget needs it, starting with the steepest run.
Footings
Wall, pillar and stair footings cut into granite where we hit it and deepened through weathered rock where we don’t. Steel set before the pour, inspected where a permit applies.
Slabs
Slabs for sheds, workshops, hot tubs and parking pads on Dehesa and Crest estate lots — sited outside the leach lines and reserve area, with a traffic-rated tank wherever trucks pass close.
Steps
Poured steps and landings down a slope, with DG paths between them where the community plan prefers them to concrete sidewalks. No curbs or gutters unless you need one.
These are the County Fire Authority’s plan-check numbers for access roads and driveways on a grading plan, from its CFA #311P sheet: 16 feet of unobstructed improved width for a single-family driveway serving no more than two homes (24 feet otherwise), 13 ft 6 in of vertical clearance, a standard cross slope of 2% and no more than 5%, a grade no steeper than 20%, and approach and departure angles no more than 7 degrees (12%). Paving must give all-weather driving, and the steeper band gets a surface textured perpendicular to the path of travel.
On a short private drive with no grading permit, the fire agency may not review it at all — but a drive a fire engine can’t climb or turn into is still a problem when it matters. We build to these limits wherever the lot allows, and say so when it doesn’t.
The County of San Diego issues the permits throughout Crest, Dehesa, Harbison Canyon and the County side of Granite Hills. Flatwork no more than 30 inches above grade is on the County’s list of permit-exempt work, but the same County code also says a residential driveway needs a permit unless it’s part of a new house permit — so we confirm with Planning & Development Services before every new driveway rather than assume. Any part of the job in the road right-of-way needs a Public Works encroachment permit.
If the driveway or pad means moving more than 200 cubic yards of earth, or cutting or filling more than 8 feet, it becomes a grading permit — and that is when the County Fire Authority checks the access numbers above. The community plan adds its own preferences for the subregion: no urban curbs, gutters or sidewalks where avoidable, and as little non-permeable paving as possible.
The three surfaces people ask us to compare for a hill driveway here.
| Broom-finished concrete | Interlocking pavers | Asphalt | |
|---|---|---|---|
| Grip on a steep grade | Good with a cross-slope broom texture | Good; joints add texture | Depends on the mix and its age |
| Near a septic tank | Traffic-rated tank or slab within 5 ft | Same rule | Same rule |
| Repairs | Saw-cut and patch; shows | Lift and relay | Patch; shows |
| Fire-engine loads | Designed thickness and base | Rated system on a fire-access drive | Designed section |
| National cost (installed) | $8–$12 per sq ft (broom) | See our pavers page | Paving trade — we don’t lay it |
Sources: County Fire Authority CFA #311P; County LAMP 2024; Fixr concrete driveway cost guide (national, Jan 2025).
Grades along the drive and at both breaks, width at the tightest point, and anything overhead lower than 13 ft 6 in.
Tank and leach lines located so the drive stays 8 feet off the lines and over a traffic-rated tank only.
PDS confirmation for the driveway, a DPW encroachment permit for the apron, grading if the earthwork calls for it.
Loose DG out, rock broken where it sits high, base compacted in lifts, forms and joints laid out to the bends.
Concrete placed in sections up the hill, broom texture across the slope, cured before traffic.
Final walk-through, care notes for the first weeks, 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) 581-2492A Crest–Dehesa pour moves with access for the truck and pump, rock in the base and how many sections a steep drive needs. These are national cost-guide figures, not our prices.
| Project (national guide) | Typical installed range |
|---|---|
| Concrete driveway, 24 × 24 ft, 5 in | $5,184 average ($3,460–$6,910) |
| Driveway, broom or colored | $8–$12 per sq ft |
| Concrete patio | $6–$17 per sq ft |
| Stamped concrete | $12–$18 per sq ft |
Sources: Fixr concrete driveway (Jan 2025) and patio (2022) cost guides, national. Pump hire, rock breaking, permits and the DPW fee are itemised separately.
Where you are tells us what kind of drive we’re likely to be pouring.
The Crest–Dehesa 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) 581-2492On a grading plan, the County Fire Authority caps an access drive at 20%, with no more than 7 degrees (about 12%) where it breaks over at the road or the pad. Steeper sections need a textured finish across the slope. If your drive is already steeper, we’ll tell you honestly what can and can’t be fixed in concrete.
Possibly. The County lists low flatwork as permit-exempt, but its code also requires a permit for a residential driveway that isn’t part of a new-house permit, so we confirm with Planning & Development Services first. The apron in a County road always needs a DPW encroachment permit.
Only over a traffic-rated tank or an engineered traffic slab — the County requires one wherever vehicles pass within 5 feet of the tank. Leach lines must stay 8 feet from the driveway.
Because in a fire the engine has to reach the house. The County’s access limits — 16 feet wide for one or two homes, 13 ft 6 in clear overhead, 20% maximum grade — are what a crew needs to get in and turn round. After the Cedar Fire, nobody up here needs convincing.
If it washes out, ruts in winter or is steep, yes — or with pavers. Decomposed granite moves under running water. A broom-finished slab or a paver drive on a compacted base gives an all-weather surface. Compare the options on our pavers page for the area.
Yes — sheds, shops, hot-tub pads and parking pads, placed outside the septic field and reserve area. Bigger structures may need their own County permit; we check before pouring.
Shaun Bagwell Masonry, 2351 Eltinge Dr, Alpine — a few miles up the road from Harbison Canyon. California C-29 licence #979389, bonded and insured. See also our Alpine concrete page.
Call Shaun at (619) 581-2492 or send the form. He’ll measure the grade, find the septic tank, sort out the permits and give you a written, itemised price.
