A perimeter barrier is priced by the foot around the building, on top of a base service fee. Measure the perimeter, and the treatment quotes itself.
A $99 base with a 180-foot perimeter at $0.35 a foot comes to $162.
The example
Three properties, each with a base fee, perimeter footage, and per-foot rate.
| A | B | C | D | E | |
|---|---|---|---|---|---|
| 1 | Property | Base | Perimeter ft | $ / ft | Total |
| 2 | Home | $99 | 180 | $0.35 | $162.00 |
| 3 | Restaurant | $149 | 320 | $0.45 | $293.00 |
| 4 | Warehouse | $199 | 600 | $0.30 | $379.00 |
The formula
One product plus the base service fee:
How it works
A fixed service fee plus footage-based barrier work:
B2is the base service fee — the visit, inspection, and interior work.C2*D2is the barrier: perimeter feet times your per-foot rate.- Adding them gives the treatment price for the property.
Commercial rates run higher per foot — more product, more obstacles, and tighter documentation than a house.
Try it: interactive demo
Enter the base fee, perimeter footage, and per-foot rate.
Variations
Add interior rooms
Charge per treated interior room on top of the perimeter.
Quarterly contract value
Scale a single treatment into an annual contract.
Pitfalls & errors
Measure the walking perimeter, including jogs and attached garages — the straight-line footprint underprices the actual spray path.
Keep separate per-foot rates for residential and commercial; a restaurant perimeter is not a house perimeter at the same rate.
Practice workbook
Frequently asked questions
How do I measure the perimeter?
How do I turn this into a contract?
Stop fighting formulas. Learn them in a day.
This recipe is one of hundreds of real-world formulas we teach. Our Excel Formulas & Functions class covers lookups, logic, text, and dynamic arrays hands-on — live in Dallas–Fort Worth, Houston, Austin, Oklahoma City, Denver, or online.
See the Formulas & Functions Class