Budget-level cost estimator · For specifiers & owners

Permeable pavement cost calculator

Line-item budget estimate by project dimensions and conditions. For early scoping and capital planning. Not a substitute for a formal bid.

Live estimate · adjust inputs to update

Calculating…

Default: 500 ft × 8 ft · CP-200 · Southeast · ±15%

01 — Project dimensions

Length (ft)

Width (ft)

For irregular areas, use total SF ÷ average width.

02 — Flexus series

CP — Civil

AP — Architectural

CP — civic and municipal. AP — design-led environments.

03 — Lift thickness

1.5″

2.0″

2.5″

2.0″ is the most common spec for primary pedestrian routes.

04 — Subbase

Stone

Depth (in)

Default 4″. Deeper for higher stormwater storage or low-infiltration subgrade.

Class II woven geotextile fabric Recommended. Separates subbase from subgrade and prevents fines migration. ~$0.40/sf installed.

05 — Site conditions

Gravel grid (geocell) Recommended for high-use applications, multi-use paths, or where subgrade stability is questionable. ~$2.50/sf installed. Earthwork required Check if site requires excavation and haul-off (typical 6–8″ cut). Uncheck if subgrade is already prepared. ~$3.50/sf when required. Edge restraint (perimeter) Hard restraint at all boundaries — concrete header or metal edging. ~$8 per linear foot of perimeter.

06 — Mobilization

Project region

Mobilization estimate

$2,500

Includes crew transport, lodging, and per diem.

Budget estimate

Total installed cost (±15%)

$0$0 – $0

0 sf · $0.00/sf average

Earthwork

Excavation + haul-off

$0
Geotextile fabric

Class II woven

$0
Gravel grid

Geocell — high-use

$0
Stone subbase

#57, 4″

$0
Flexus material + install

CP, 2.0″ lift

$0
Edge restraint

Perimeter

$0
Mobilization

Crew, lodging, per diem

$0
Subtotal $0

Budget estimate only — not a bid. Southeast pricing. ±15% variance. Final pricing requires a scope review with drawings and site conditions.

When to use this tool

Early planning

Confirming Flexus fits your budget before committing to drawings or a formal RFQ.

Comparing alternatives

Side-by-side with concrete or asphalt. On projects where a permeable surface is required, Flexus often eliminates the separate stormwater infrastructure cost.

When not to use it

Not a bid number. Final pricing depends on geotechnical conditions, site access, and drainage design.

Permeable pavement cost calculator

When to use this tool

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