Pay Invoice
Beginning 11/01/2021, all payments made by credit card (on this site or over the phone) will include a 3% convenience fee.
If you prefer to pay by check, please mail to:
Landplan Engineering
Attn: Accounts Receivable
1310 Wakarusa Drive Suite 100
Lawrence, KS 66049
Enter the amount of your invoice below, and then click “Pay Now.” You will then be directed to a secure site to complete your payment.