Retaining & Seating Walls

Cost depends mostly on height, length, and material, plus how much excavation, reinforcement, and drainage the site requires. Taller walls need engineering and reinforcement, which adds cost, while a low garden or seating wall is more modest. We assess the grade and soil on-site and give you a clear, itemized estimate.

Often, yes. Many townships require engineered drawings and a permit for walls over a certain height, typically around four feet, and for walls that carry extra load such as a driveway above them. We are familiar with local requirements across Montgomery County and the Main Line and will handle the engineering and permitting your wall needs.

The two biggest causes are poor drainage and a weak base. We prevent both with a compacted aggregate base, free-draining gravel backfill, drain pipe to relieve water pressure, and geogrid reinforcement on taller walls. Building it right underground is the entire reason our walls stay put.

Absolutely. Seating walls are one of the most popular features we build. We can cap a wall at seat height around a patio or fire pit so it provides structure, definition, and built-in seating all at once, which is a great way to add capacity without crowding the space with furniture.

Yes. We assess whether the existing wall can be rebuilt or needs full replacement, identify the drainage or base issue that caused the failure, and build the new wall correctly so the problem does not return. Catching a leaning wall early often saves cost versus waiting for it to collapse.