It is the first question almost everyone asks, and the honest answer is: retaining walls aren't priced by the linear foot — they're priced by the square face foot. That's the height of the exposed wall multiplied by its length. A 20-foot-long wall that stands 2 feet tall is 40 square face feet. The same 20-foot wall standing 5 feet tall is 100 square face feet, holds back far more earth, and almost certainly needs engineering. Same length, very different wall, very different price.
Below are general market estimates across the trade for the Texas Hill Country. These are not Johnson Ranch Landscape's rates — they're industry ranges meant to help you sanity-check a quote and budget a rough order of magnitude. Real pricing comes from a site walk, because the ground under your wall is the thing that actually sets the cost.
General market ranges by wall type
The face material is mostly a look-and-budget decision. The structure behind it — footing, backfill, drainage — is the real work. Here's how the common wall types tend to land per square face foot across the market:
| Wall Type | General Market Range (per sq. face ft.) | Best For |
|---|---|---|
| Segmental block (SRW) | $25 – $40 | Clean, modular, taller engineered walls |
| Poured concrete | $30 – $60 | Structural walls, often veneered after |
| Boulder / rock | $35 – $65 | Naturalistic slopes, large equipment access |
| Dry-stack limestone | $35 – $70 | Garden and accent walls, Hill Country look |
| Mortared stone | $45 – $90 | Rigid structural walls, finished masonry |
These are general market estimates across the trade, NOT Johnson Ranch Landscape's rates. We don't quote a price until we've read the site. Use these to plan, not to commit.
Why the spread inside each type is so wide
Notice that even a single material spans a 2x range. A short dry-stack garden border with easy access sits at the bottom; a tall dry-stack wall with rock excavation and full drainage sits at the top. The material name barely narrows it down. What narrows it down is the site.
What actually moves the price
Height and engineering
This is the single biggest lever. In Comal County and most Hill Country jurisdictions, a wall under four feet of exposed face generally doesn't require engineered drawings. The moment you pass four feet — or hold back a driveway, a structure, or a pool — you need engineered specs. That adds design fees, a deeper and wider footing, often geogrid reinforcement tied back into the hillside, and inspections. A tall wall isn't a short wall stacked higher; it's a different structural problem. Our retaining wall service page walks through how we scope that engineering threshold.
Drainage behind the wall
Water is what destroys retaining walls, not weight. When water builds up behind a wall with nowhere to go, hydrostatic pressure pushes the whole thing out. A proper wall has gravel backfill, perforated drain tile at the base, and weep holes through the face. That material and labor is built into a real price. If a bid looks cheap, drainage is the first thing to check, because skipping it is the number one reason walls fail.
Caliche and rock excavation
This is the Hill Country wildcard. Much of the region — and the higher, drier ground around Boerne in particular — sits on dense caliche and limestone bedrock. A footing dig that's a quick afternoon in soft soil becomes a jackhammer or mini-excavator job in rock. You can't see it from the curb, and it can swing a budget meaningfully. An honest contractor flags the possibility before digging instead of hitting you with a change order halfway through.
Access, backfill, and footing
- Access: if a skid steer can drive to the wall, labor drops. If every stone and yard of gravel is wheelbarrowed through a gate, it climbs.
- Backfill soil: unstable or clay-heavy soil behind the wall may need to be hauled off and replaced with engineered fill.
- Footing: depth and width scale with wall height. A taller wall needs a bigger compacted base, and that base is concrete, gravel, and time you don't see once it's buried — but it's why the wall is still standing in twenty years.
How to budget honestly
Take your wall's height times its length to get square face feet, pick the material range above, and you have a rough planning number. Then add a contingency for rock if you're anywhere caliche is common — which, in the Hill Country, is almost everywhere. That gets you to a ballpark. It does not get you to a real number, because no two slopes read the same.
When you're ready for an actual price, we'll come walk the property, read the slope and soil, check what's draining toward the wall, and put it in writing — line by line, locked, no guessing. Start a proposal here and we'll get you a real number for your property.