Cost guide
Interior Drainage System Cost Guide
Use this page to compare complete proposals for the same work. It does not estimate a project or substitute for an on-site assessment.
Planning range
No planning figures are published here yet. The range will appear only after figures are manually reviewed and entered with a source in the site’s cost data file.
Unit: per linear foot or defined perimeter scope
Last reviewed: Awaiting manual review · Source: Awaiting source
Scope being priced
This guide covers an interior water-collection system at the foundation perimeter. The work can include slab cutting, a drainage channel, wall drainage material, a sump connection, and restoration around the affected basement perimeter.
What changes the price
- Linear footage and whether the work covers a short affected wall or a larger perimeter.
- Slab thickness, reinforcement, obstructions, and how difficult the concrete is to remove.
- Finished walls, flooring, fixtures, stairs, or storage that must be protected or removed.
- Need for a new sump pit, discharge route, pump equipment, or electrical coordination.
- Soil water conditions and the amount of restoration after the drain is installed.
What a quote should itemize
- The exact wall lengths or perimeter sections included in the system.
- Concrete cutting, debris removal, drain channel, drainage stone, and wall drainage materials.
- Sump, discharge, pump, and electrical items when they are part of the design.
- Finish removal and the level of slab, wall, or flooring restoration included afterward.
- How water is expected to enter, move through, and leave the completed system.
Red flags in a quote
- No linear footage or affected perimeter is identified.
- The quote calls work 'full perimeter' without naming excluded walls or rooms.
- Sump and discharge needs are left as vague allowances.
- Restoration is described as included without stating the condition or material to be restored.