Block and stone walls, steps, chimneys and fire-safe hardscape for ranch and rural homes in the Mountain Empire — built for 90-degree afternoons, freezing nights and fire season. Licensed C-29 mason, based in Alpine. Call to have Shaun look at your property.
CSLB #979389 · C-29 Licensed · Bonded $25,000 · Free on-site estimates
The Mountain Empire by the numbers
The Census Bureau groups the border communities of the county’s southeast corner as the Mountain Empire division: about 7,800 people in 2,876 homes across 450.6 square miles — roughly 17 people to the square mile. Nearly three in four occupied homes are owner-lived, and the median house was built in 1980, so a great many walls, slabs and chimneys out here are now in their forties.
The weather is the hard part. The Campo station, with records back to 1948, averages 88.2 days a year at 90°F or above and 78.9 nights at or below freezing — compare Alpine’s 64.9 and 6.6. Average lows from December to February sit within two degrees of freezing, and from June to August the gap between afternoon and night is more than 40 degrees. Masonry here is heated and chilled every day, and in a region where wood heats 23.9% of homes, the chimney takes the worst of it.
What makes building out here different from the coast — or even from Alpine — is all on the record: the weather station, the fire history, the EPA’s water designation and the County’s codes.
Heat and frost
June averages 86.6°F by day and 44.6°F at night at the Campo station; December averages 62.6°F and 32.7°F. Brick, block, stone and mortar expand and shrink with every one of those swings, and water in a crack freezes on close to 80 nights a year. We use mortar matched to the masonry rather than the hardest mix on the truck, build in control joints on long block walls, and cap every wall so water runs off it rather than into it.
Footings
The residential code sets exterior footings at least 12 inches below undisturbed ground and adds that they must be protected from frost — below the frost line, on solid rock or in a frost-protected design — and never placed on frozen soil. With freezing nights through most of the winter, we pour after the trench has thawed, protect fresh mortar when lows drop under 40°F, and take a footing down to rock wherever the dig finds it.
Fire
CAL FIRE records the 2007 Harris Fire starting at Highway 94 and Harris Ranch Road near Potrero; it burned 90,440 acres and destroyed 560 structures. The County’s 2026 wildfire code now keeps the first five feet around a house to hardscape and noncombustible materials, and its fence rules say anything within five feet of a building must be noncombustible. A stone or block wall where a wood fence meets the house, and pavers or concrete instead of bark against the walls, are the masonry answers.
Groundwater
In 1993 the EPA designated the Campo/Cottonwood Creek aquifer a sole-source aquifer — its term for groundwater that supplies at least half the drinking water of the area above it, with no reasonable alternative if it were polluted. That is the water most homes here drink. On site we find the well and septic system before we lay out a footing, keep wash-out from concrete and mortar contained, and drain new hardscape away from the wellhead.
Wood and propane
Census figures show 23.9% of Mountain Empire homes heat mainly with wood — nearly 40 times the county rate — and 43.0% with tank propane; just 2.8% have piped gas. That makes the masonry chimney a working part of many houses, and the place where heat, frost and fire risk all meet. Our Campo chimney and fireplace page goes into it.
Stone tradition
The Campo Stone Store, California Historical Landmark No. 411, is the “fort-like” stone building that replaced the Gaskill brothers’ frame store after border bandits raided it in December 1875; the County restored it as a museum between 1943 and 1948. In Jacumba, the stub of the burned Hotel Jacumba’s massive central fireplace still stands. Stone has a long history out here, and it still suits the climate and the fire risk better than anything that burns.
All four communities are unincorporated, so walls, footings and fireplaces are permitted by the County of San Diego Planning & Development Services. County zoning places no limit on the height of a retaining wall holding a bank, but every retaining wall over 3 feet needs a building permit; the 2026 exemption only covers walls retaining 3 feet or less from the top of the footing, with level backfill, no surcharge and no structure within 6 feet. On rural lots that is often not the case.
A freestanding masonry wall up to 6 feet that meets zoning needs no building permit, and the County publishes standard block-fence designs with a 24-inch-deep footing. Solid walls are capped at 42 inches in a front setback and 72 inches at the side and rear, but lots of an acre or more in the rural and agricultural zones can run open fencing — pipe corral, wrought iron, rail — to 72 inches out front, often hung between masonry pilasters. Where a driveway meets State Route 94 or another state highway, the apron needs a Caltrans encroachment permit; onto a County road, a DPW one.
For ranch houses, rural homes and older buildings — each priced in writing after a site visit.
Crowns, caps and spark arrestors, repointing joints opened by heat and frost, flashing, and rebuilding stacks that have loosened above the roof.
Reinforced, grouted CMU walls with control joints and caps for a big daily temperature swing; noncombustible sections where fences meet the house.
Walls that hold building pads, driveways and terraces on rural slopes, drained behind and footed below frost or on rock; County-permitted over 3 feet.
Stone or block pilasters for gates and open corral or iron fencing, on footings sized for the gate’s weight and swing.
Pavers, flagstone and concrete in the five feet around the house, laid on a compacted, drained base that holds up to frost.
Concrete poured on thawed ground, protected while it cures, with aprons permitted through Caltrans or the County as the road requires.
New masonry fireplaces and hearths, and outdoor fireplaces sited well clear of the house and brush.
Repointing and resetting stone on older ranch and commercial buildings, with mortar matched to the original rather than hard modern cement.
Not sure which of these your property needs? Shaun will look at it with you — free, on site, no obligation.
Call (619) 581-2492The 2026 ranges we quote county-wide. Out here the swing comes from distance and access, rock in the trench, long fence and wall runs, and whether a wall fits the County’s standard designs or needs engineering.
| Project | Typical 2026 range |
|---|---|
| Retaining wall, CMU or engineered | $35–$120 per sq. face ft. |
| Block wall, CMU with stucco or veneer | $250–$400 per linear ft. |
| Patio or pavers | $18–$40 per sq. ft. |
| Masonry chimney repair | $1,500–$8,000+ by scope |
Use these to budget, not as a bid. Engineering and County or Caltrans permit fees are shown separately on your written proposal.
Each is unincorporated and permitted through the County. Over the mountain, Pine Valley and Descanso have their own Central Mountain page; our yard is in Alpine.
Straight answers to what Campo & the Mountain Empire homeowners ask before they hire. Anything else — call, and Shaun answers it himself.
Call (619) 581-2492Yes. We’re based in Alpine and cover the Mountain Empire along I-8 and Highway 94. Shaun visits the site before quoting and gives you the price in writing.
Mostly movement and water. The Campo station averages more than 40 degrees between day and night in summer and almost 80 freezing nights a year. Walls without control joints, solid grout where it’s needed, or a cap that sheds water crack sooner. We build all three in.
For a wall over 3 feet, yes, from County PDS. The 2026 exemption only covers walls retaining 3 feet or less from the top of the footing with level backfill, no surcharge and no structure within 6 feet.
A freestanding masonry wall up to 6 feet needs no building permit if it meets County zoning, which allows solid walls of 72 inches at the side and rear and 42 inches in a front setback. Larger rural lots can run 72-inch open fencing in front.
The EPA designation mainly brings federally funded projects under EPA review. For a private wall or patio it doesn’t add a permit, but it is a good reason to keep concrete wash-out, mortar and runoff well away from your well — which we do on every job.
The first 5 feet around a building has to be hardscape or noncombustible, and any fence within 5 feet of the house must be noncombustible. Pavers, concrete walks and a short block or stone section where a wood fence meets the house are the usual fixes.
Work in a state highway right-of-way such as SR-94 needs a Caltrans encroachment permit; a driveway onto a County road needs one from County DPW. We tell you which applies before the price is final.
Enter #979389 in the CSLB’s “Check a License” search at cslb.ca.gov. It is a C-29 Masonry licence issued to Shaun Bagwell Masonry on 14 December 2012, with the business bonded and insured.
Call Shaun at (619) 581-2492 or send the form. He’ll drive out from Alpine, look at the ground, the slope and the chimney, explain what the County and the fire code ask for, and give you an itemised price in writing.
