A Guaranteed Maximum Price (GMP) clause in real estate construction contracts establishes an upper limit on the total cost the contractor will charge the property owner for the project. Once the GMP is agreed upon, the contractor bears the financial risk if actual costs exceed this amount—they cannot bill the owner for overages without explicit change orders. This creates a powerful incentive for the contractor to manage costs efficiently and accurately estimate expenses upfront. The clause typically includes provisions for what costs are included in the GMP (labor, materials, overhead, profit) and what circumstances might trigger legitimate adjustments (owner-requested changes, unforeseen site conditions, permit requirement changes).
The GMP clause matters significantly because it provides budget certainty and financial protection to property owners, preventing the common construction scenario where projects spiral into cost overruns. However, it also shifts substantial risk to contractors, who must build contingencies into their pricing. Disputes frequently arise over whether specific costs fall within the GMP or qualify as change orders, making the definition of scope critically important.
Before signing a GMP clause, ensure the scope of work is extraordinarily detailed and attached as an exhibit—ambiguity will be interpreted against the contractor, creating disputes. As an owner, negotiate which unforeseen conditions (soil conditions, hidden structural issues, permit delays) justify price adjustments, and establish a clear change-order process with documentation requirements. As a contractor, build adequate contingencies into your GMP estimate and require owner sign-off on all scope assumptions in writing. Consider whether a "cost-plus" arrangement with a guaranteed maximum might better protect both parties than a pure GMP.
Frequently Asked Questions
What does this clause mean in simple terms?
A Guaranteed Maximum Price (GMP) clause in real estate construction contracts establishes an upper limit on the total cost the contractor will charge the property owner for the project.
Why should I care about this clause?
Once the GMP is agreed upon, the contractor bears the financial risk if actual costs exceed this amount—they cannot bill the owner for overages without explicit change orders.
What are my options?
This creates a powerful incentive for the contractor to manage costs efficiently and accurately estimate expenses upfront.
How does this affect small businesses?
The clause typically includes provisions for what costs are included in the GMP (labor, materials, overhead, profit) and what circumstances might trigger legitimate adjustments (owner-requested changes, unforeseen site conditions, permit requirement changes).