This Additional Services Authorization is made on October 17, 2026 between Your Company ("Architect") and Your Client ("Owner"). It adds to the agreement between them for [the project and the agreement's date, for example: the 14 Elm Street addition, dated March 3, 2026] (the "Agreement").

1. Reason for the Change

[Describe what prompted it, for example: Owner has asked to add a 240 square foot covered porch at the rear of the house, after design development was approved.]

2. Additional Services

Architect will provide these services, which aren't part of the basic services in the Agreement:

• Revise the floor plans, elevations, sections, and roof plan affected by the change
• Coordinate the change with the structural engineer and other consultants
• Update the construction documents and permit set, and respond to plan review comments the change causes

3. Fee

These services are billed hourly at the Agreement's rates of $150 per hour for a principal architect and $110 per hour for project staff. The estimated fee is $[amount, for example: 3,200], and Architect won't exceed it without Owner's written approval. Reimbursable expenses are billed at cost, as in the Agreement.

4. Schedule

The change adds about [two weeks] to the construction documents phase. Later dates in the Agreement move by the same amount.

5. Agreement

All other terms of the Agreement stay the same and apply to these services. Once signed by both parties, this authorization becomes part of the Agreement. Architect will begin the work when it receives Owner's signature.

By signing below, Owner authorizes these additional services and their fee.