Fire pits and seat walls
Fire pit and seat wall
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Pavers in Frederick & Central MD
Segmental retaining walls
A retaining wall is a drainage structure that happens to hold soil back. Saturated ground pushes far harder than dry ground, and nearly every failed wall was built for the dry number.
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Quick answer
What does a retaining wall cost in Maryland?
A standard segmental wall runs $30 – $60 per square foot of exposed face, and a taller geogrid-reinforced wall $45 – $85. The jump is not the block — it is deeper excavation, far more backfill placed in lifts, reinforcement extending several feet into the slope, a designed drainage outlet and usually a permit and an engineer’s drawing. The face doubles in height; the work behind it more than doubles. Removing a failed wall is $12 – $30 per square foot of face.
The work
What retaining wall actually involves.
The intuitive picture of a retaining wall is a strong thing standing against a heavy thing, and that picture is why so many walls fail. What sits behind a wall is soil whose weight changes with the weather, and the difference between dry and saturated is not marginal. A wall that stood through four summers and leaned after one wet March was never carrying the load it needed to carry; it was carrying the easy version of it.
So the work that makes a wall last is mostly work you will never see. A column of clean drainage stone running up the back of the block for its full height, a perforated pipe at the base of that column falling continuously to an outlet where water can actually get out, separation from the soil being retained, and — above a certain height — reinforcement extending back into the slope between courses. Walls that fail are usually missing two or three of those four.
Height is where this stops being landscaping and becomes a structure with paperwork. Most Maryland jurisdictions require a permit above a certain retained height, commonly around four feet measured from the bottom of the base course rather than from the ground you can see, and above that an engineered design is typically asked for too. A wall surcharged by a driveway, a pool or a slope above it can be treated differently again. We check with the county that has jurisdiction before anybody digs.
Drainage column and outlet pipe behind the full height
Geogrid reinforcement where the height needs it
Permit and engineering threshold checked first
What retaining wall costs in Maryland
Maryland segmental retaining wall installation, 2026. Priced per square foot of exposed wall face, which is how this trade measures. Walls above the permit threshold carry an engineered design and the drawing is quoted separately — we build to it rather than producing it.
- Retaining or seat wall
- $30 – $60 per square foot of face
- Geogrid-reinforced wall, taller runs
- $45 – $85 per square foot of face
- Drainage stone, pipe and outlet
- Included
- Steps built into a wall run
- $350 – $800 per riser
- Removing a failed wall
- $12 – $30 per square foot of face
- Engineered design, where required
- By the engineer, at cost
Ranges, not quotes. Real numbers come from a walkthrough — access, condition, height and finish level move a price more than square footage does. Estimates are free and in writing.
Get your numberFull retaining wall cost guide for MarylandPrefer to just talk?
Call and describe the job. You’ll get a straight answer on whether it’s something we do and roughly what it runs.
(301) 524-1729
Self-performed
Segmental retaining walls
What’s included
Everything the retaining wall scope actually covers.
Written into the estimate, not assumed. If something on your job is not on this list, it gets priced and named before anyone starts.
Base course below grade, on compacted stone
01The first course is the one every other course inherits, and it goes below finished grade on a compacted levelling pad rather than on soil. Level, true, and buried deep enough that the toe of the wall is confined. A base course set on the surface is a wall that walks forward.
Drainage column for the full height
02Clean, open-graded stone behind the block from the base course to the top, not just a shovelful at the bottom. Water entering the slope hits the stone and drops rather than loading the wall. This is the single most important thing behind a wall and the thing most commonly reduced to a token gesture.
Perforated pipe to a real outlet
03At the base of the drainage column, falling continuously to somewhere water can leave — daylight on the slope below, or a proper outlet structure. A drain pipe that runs level, or ends in backfill, or discharges into a low spot with no exit, is a reservoir with a good story attached.
Geogrid where the height requires it
04Above the point where a wall stops being self-supporting, sheets of geogrid between courses extend several feet back into the retained soil and get buried under compacted backfill. That ties the mass of earth to the wall face, so what resists the push is a reinforced block of ground rather than a stack of block. It cannot be added later — installing it means excavating the soil it reinforces.
Backfill compacted in lifts, and batter
05Backfill behind the drainage column goes in and gets compacted in layers, because material that consolidates later takes the wall with it. The wall itself is built with the setback its system specifies, so it leans very slightly back into the slope rather than standing plumb — a plumb wall has nowhere to go but forward.
Caps, corners and the grade above
06Caps set with the right adhesive so they do not lift or rock, corners and curves built in the system rather than cut to fit, and the ground above the wall graded so surface water runs somewhere other than straight down the back of it. A wall with a lawn draining into it is being asked to do two jobs.
On the job
Pavers work across Frederick & Central MD.
What the trade looks like at each stage. Photos of our own recent jobs come out at the walkthrough, on the actual house.
Straight answers
Retaining wall questions
Not covered here? Call and ask — you’ll get a real answer, not a “depends on the job”.
Above a certain retained height, yes. The threshold is commonly around four feet measured from the bottom of the base course rather than from visible ground, and above it an engineered design is normally required as well. A wall with a driveway, pool or slope bearing on it may be treated differently at a lower height. The rule belongs to the jurisdiction — Frederick County, Montgomery County and each of the others publish their own — so we confirm before digging instead of guessing.
It depends why. If the top courses have been pushed out because the drainage behind them silted up or was never built, the repair can be taking the wall down below the movement, correcting the drainage and rebuilding upward with the same block. If the base course has moved, or the ground behind the wall is itself on the move, the wall is telling you the structure is wrong rather than its top, and straightening the face achieves nothing. We would look before saying which one you have.
Sight along the face: a belly in the middle, or a cap course that was level and now dips, means movement. Then the joints — vertical gaps opening between blocks that used to sit tight, caps rocking underfoot, a corner pulling away from the run. Seepage through the face after rain says water is coming through the wall rather than down the stone and out the pipe. A crack or a soft strip in the lawn a few feet behind the wall is the serious one: keep off it and call somebody.
Same crew, same visit
The rest of the pavers work.
Most pavers jobs are two or three of these at once, which is why they are priced and scheduled together rather than as separate call-outs.
From the field
Read up before you book.
Longer answers than a quote page has room for — how the work fails, what putting it right actually involves, and when waiting is the honest call.
Sources worth your time
Check us, and check the work
None of these are ours. They are the offices and standards bodies that set the rules we work to, so you can verify what we say rather than take it.
Concrete Masonry & Hardscapes Association
The body that sets installation guidance for interlocking concrete pavement and segmental retaining walls, formed when ICPI and NCMA merged. Base depth, compaction, edge restraint and the height at which a wall needs engineering all come from here rather than from us.
OpenFrederick County permits and inspections
The county office that decides whether your job needs a permit. Routine gutter work does not; structural and roof work usually does.
OpenMontgomery County permitting services
Germantown, Gaithersburg, Rockville and Clarksburg permits, which are their own process and their own timeline.
Open
Talk to the people doing the work
Get a straight number for the whole job.
Tell us what needs doing. We’ll walk it with you, sequence every trade it touches, put the price in writing, and leave you to decide.
Get a quote
Let’s price your project.
Two short steps. No obligation, no pressure — just a clear number and a straight answer about what the job involves.
Tick as many as you like. Most jobs are two or three of them at once, and I sort out the detail when I come and look. Nobody gets turned away for choosing the wrong box.
