Retaining Walls | Iron Peak Landscaping

Iron Peak Landscaping builds retaining walls across the Flathead Valley, based in Kalispell, MT.

A retaining wall that looks solid on install day and a retaining wall that's still standing straight in five years are built differently, even if they use the same block. The part nobody sees — the buried base, the backfill, the drainage behind the wall — is the part that decides which one you got.

Iron Peak Landscaping builds walls with a proper footing buried below grade, compacted base rock, and drainage behind the wall so water pressure doesn't build up and push the face out. On sloped lots around Bigfork and Lakeside where retaining walls are doing real structural work, cutting that corner isn't a small risk — it's the difference between a wall and a pile of block waiting for spring runoff.

Why It Matters in the Flathead Valley

Retaining walls fail for one of two reasons almost every time: no drainage behind the wall, or a footing that isn't buried deep enough to resist frost heave and slope pressure. Water that can't get out builds up behind the wall face and pushes — that's what makes a wall bow, lean, or blow out after a wet spring. On the lake-adjacent slopes around Bigfork, Lakeside and Somers, that pressure is constant, not occasional. A wall built to hold back a few feet of grade on a flat lot in Kalispell needs a different footing and drainage plan than a wall holding a slope down toward Flathead Lake — sizing that correctly is a site-by-site call.

How a Retaining Walls Job Gets Built

Walk the Site

Slope, soil, drainage path and what's above and below the wall — retaining walls are structural, so this step matters more here than anywhere else.

Quote in Writing

Wall height, block or stone type, footing depth and drainage plan, spelled out before anything gets built.

Build It Right

Footing buried below grade, base compacted, wall built with drainage rock and a drain line behind it, backfilled and graded to shed water away from the wall.

What's Included

Excavation and buried footing sized to wall height and slope load
Compacted base rock under the footing
Drainage rock and drain line behind the wall
Block, stacked stone, or boulder wall construction
Proper backfill and finish grading above and below the wall
Cap or finish course as needed for the wall style

Recent work

Retaining Walls we've built

Stacked stone retaining wall with buried footing and drainage, Flathead Valley

Curved block retaining wall built around a graded slope, Flathead Valley

Curved island planting bed built around a boulder, Flathead Valley

Common questions

How tall a retaining wall can be built without an engineer?

Most retaining walls under about 3–4 feet can be built to hold on standard residential footing and drainage. Taller walls, walls holding a slope near a structure, or walls with a driveway or heavy load above them may need an engineer's stamp — we'll tell you straight if your project crosses that line.

Why did my old retaining wall start leaning?

Almost always water pressure with nowhere to go. If a wall was built without drainage rock and a drain line behind it, water builds up in the soil behind the wall every wet season and slowly pushes the face out. It's a drainage problem wearing a structural symptom.

What's the difference between block and stacked stone retaining walls?

Block systems are engineered, interlocking, and fast to build to a consistent line. Stacked or dry-stone walls are built by hand, stone by stone, and read more natural — but take more time and skill to keep structurally sound. We'll walk you through which fits your yard and budget.

Do you build retaining walls on lakefront or steep-slope lots?

Yes — that's a lot of what retaining walls are for around Bigfork, Lakeside and Somers. Slope walls need more attention to drainage and footing depth than a flat-yard wall, and we plan for that from the first site visit.

Get a quote

Tell us about the project.

Get a Free Quote Call (406) 609-7756