Allen · Dallas · Plano · McKinney and nearby
Retaining Walls and Hardscaping in Allen, TX
"My retaining wall has started to lean." Most retaining walls around Allen and Dallas don't fail because the block was weak. They fail because water had nowhere to go behind them, and the clay here holds water and pushes when it's wet. Call (469) 283-6279 and we'll connect you with a retaining wall and hardscape pro serving your area. Before you hire anyone, ask four things: what goes behind the wall (gravel backfill, a perforated drain pipe and filter fabric), how deep the footing goes, whether your wall needs a permit, and whether the quote is the price or just "estimate only billed at completion." Ask the same about walkways and flagstone.
Last updated October 23, 2026
If this sounds familiar
"The wall that came with the house is leaning"
Builder walls are often stacked with clay packed right behind them and no drain. After years of wet springs and dry summers, the top tips out. Sometimes a pro can rebuild it with the same stone. Sometimes you need a new wall.
"It cracked inside the warranty, and he's too busy"
"Work has 1 year warranty and has cracks that need to be repaired now." Get the fix-it terms in writing before the wall goes up, and keep the last payment until the backfill and drain are in.
"Nobody ever sent the quote"
"I've been ghosted a few times after someone comes out for a quote." Calling here puts you on the phone with a pro who covers your zip, so you're not chasing three companies.
Why retaining walls lean, crack and fail
- Gravel backfill, not the clay that came out of the hole. "Clay is prone to hold water and settle."
- A perforated drain pipe at the base of the wall, with somewhere to send the water.
- Filter fabric between the gravel and the soil so the soil doesn't wash into the stone: "the soil runs right through it, no filter fabric."
- A footing below the first course, compacted, so the wall doesn't sink at one end.
- The right wall for the height. Taller walls, and walls with a driveway or slope above them, need engineering.
Does your wall need a permit?
- McKinney: "A permit for any retaining wall is required in the City of McKinney, regardless of height. Retaining walls more than two feet in height require engineered plans." (Building Inspections, 469-617-4800)
- Allen: retaining walls aren't on Allen's list of work that's exempt from permits. Call Allen Building & Permitting at 214.509.4130 before you build.
- Other North Texas cities, including Carrollton, Corinth and Prosper, set the line at 4 feet measured from the bottom of the footing, with engineered design above that.
- Dallas and Plano: check with the city's building inspections office for your wall.
Here's how the cities around Allen measure a wall and what to ask before anyone digs.
Price, plainly
Retaining wall prices swing more than any other hardscape: "$60,000 for a retaining wall. Am I getting fleeced?" and "A $12k estimated job became a $14k job" are both in the threads. What moves the number is height, length, the block or stone, how much soil has to be dug out and hauled, access for equipment, and engineering if the wall is tall. Ask for a quote that's the price, not "estimate only billed at completion," and that lists backfill, drain pipe, fabric and haul-off.
Walkways and flagstone that stay put
Loose flagstone is usually one of two things: it was set dry on sand with no compacted base, or it was mortared onto a thin slab that cracked. "The flagstones on the slope are the ones that are failing the fastest." On a slope, flagstone needs a compacted stone base and steps that hold the grade, not stones laid on the hill. Ask whether yours will be dry-laid or mortar-set, and what goes under it.
Getting the wall built without wrecking the lawn
Walls mean digging, and digging means machines: "they tore through my yard 50+ times with riding equipment." Ask how equipment will reach the wall, where the dirt pile will sit, and whether they'll lay plywood or mats on the lawn.
Walls on North Texas clay
On sloped lots in Allen you'll see front yards held up by stacked limestone walls. The clay here swells when it's wet and opens cracks when it's dry ("My driveway does this every year when it's dry. It will close up when it rains."), which is the push and pull a wall has to survive. Drainage behind the wall is what lets it.
What happens after you call
- Call (469) 283-6279, press 1, enter your zip, and you're connected with a local pro.
- They measure the height and length, look at where water comes from, and check access.
- They tell you whether the wall needs a permit or engineering in your city.
- You get a written price listing footing, block or stone, backfill, drain pipe, fabric and haul-off.
- Footing, wall, drain and backfill, then cleanup. Walk it before the last payment.
Where this applies
Allen, Dallas, Plano, McKinney, and the rest of our service areas.
Questions people ask
Do we need permits to build these retaining walls?
It depends on the city. McKinney requires a permit for every retaining wall, and engineered plans over 2 feet. Allen doesn't list retaining walls as exempt, so call 214.509.4130. Several nearby cities draw the line at 4 feet from the bottom of the footing.
Will putting the base rock in when the ground is wet cause me any footing issues?
It can. Wet clay won't compact properly, and the footing can settle later. A good pro waits for the ground to dry out.
Do you warranty a retaining wall?
Ask the pro you're connected with what they cover and for how long, and get it in writing before work starts.
$60,000 for a retaining wall. Am I getting fleeced?
Maybe not, if it's tall, long, engineered or hard to reach. Ask for the price broken out by length, height, material, drainage and haul-off, then compare quotes line by line.
Can I just stick them back down?
Loose flagstone set on sand can often be lifted, re-bedded and set again. Stones that sit on a cracked mortar bed usually need the bed fixed first.
Find out what's behind the wall before it starts to lean
Call (469) 283-6279 and we'll connect you with a retaining wall and hardscape pro serving your area.