Actaeon LLC
Retaining wall installation contractor · Washington, DC
Contact and location
| Address | 4600 Powder Mill Rd |
|---|---|
| Phone | (240) 762-3467 |
What to confirm before booking
- Ask who stamped the design, and ask to see the plan for your retained height and surcharge.
- Ask what the quote includes for excavation, geogrid, drainage aggregate, pipe and disposal.
- Ask what the warranty covers, how long it runs, and whether it survives a change of owner.
Local cost context
Retaining wall construction in Washington sits inside the national bands published on this site: block wall at $4,500–$10,500, checked 8 November 2026. That is a planning band, not a quote from this firm. See the cost guides →