Exterior French Drainage Systems
French Drains & Foundation Drainage Correction
Indiana Residential Code requires grade to fall six inches within the first ten feet. Most failing foundations we see in Central Indiana violate that rule somewhere.
- Typical project
- $3,500 – $8,500
- Inspection
- $0
- Code basis
- 2020 Indiana Residential Code (675 IAC 14-4.4) Section R401.3
Hamilton, Marion, Boone, Johnson Counties
Written scope, no obligation
How much does exterior french drainage systems cost in Fishers, IN?
Exterior French Drainage Systems in the Greater Indianapolis & Hamilton County market typically runs $3,500 – $8,500, driven by unit count, depth to competent soil and site access. Every quote is a written scope engineered to 2020 Indiana Residential Code (675 IAC 14-4.4) Section R401.3.
| City | Cost range | Typical duration | Permitting |
|---|---|---|---|
| Fishers, IN | $3,500 – $8,500 | 1–3 days | City of Fishers Building Department |
| Carmel, IN | $3,500 – $8,500 | 1–3 days | Carmel Department of Community Services |
| Zionsville, IN | $3,500 – $8,500 | 1–3 days | Boone County Area Plan Commission |
| Noblesville, IN | $3,500 – $8,500 | 1–3 days | Noblesville Planning & Development / Hamilton County Plan Commission |
| Greenwood, IN | $3,500 – $8,500 | 1–3 days | Greenwood Community Development Services / Johnson County |
| Indianapolis, IN | $3,500 – $8,500 | 1–3 days | Indianapolis Department of Business & Neighborhood Services (BNS) |
Drainage is the root fix
Clay soils only move when their moisture content changes. Control the water and you control the movement — which is why we treat drainage as part of nearly every structural repair rather than an upsell.
Code Section R401.3 requires impervious surfaces within ten feet of the building to slope a minimum of six inches away. Settled grade, added patios and buried downspouts routinely break that.
Systems we install
- Exterior French drains with perforated pipe in washed stone and filter fabric
- Footing drains tied to daylight or a sump discharge
- Interior perimeter drain tile with sump basin where exterior access is blocked
- Swales and regrading to re-establish positive fall
- Buried downspout extensions discharging ten feet or more from the structure
Freeze protection
Discharge lines are set below or sloped to shed water so Central Indiana freeze-thaw cycles cannot lock the system with ice in January.
Questions
Exterior French Drainage Systems FAQs
Local pages
Exterior French Drainage Systems by city
Soil and permitting differ by market. Jump to the page for your city.