Start with a Clear Design Foundation
In residential construction, the success of a project often depends on decisions made long before construction begins. Design defines scope, shapes expectations, and influences cost, schedule, and how the project will ultimately be built.
When the relationship between the owner and architect is not clearly defined, misalignment can carry through the entire project.
The B110™ – Agreement Between Owner and Architect for a Custom Residential Project was developed to establish that foundation. It provides a clear, standardized framework for architectural services on custom residential projects.
What Is the B110 Agreement?
The B110 is an agreement between an owner and an architect for services on a single-family residential project.
It covers the full scope of architectural services, from initial design through construction administration.
As part of the AIA residential contract documents, the B110 defines how design services are performed, how decisions are documented, and how the architect supports the project during construction.
At its core, the purpose of the B110 is straightforward:
- Define the scope of architectural services
- Establish roles and responsibilities during design
- Support coordination between design and construction
How B110 Fits Within AIA Residential Contracts
The B110 agreement is part of a series of AIA residential contract documents developed specifically for home building. The documents provide a consistent framework for residential construction that can be used together or alone based on the project structure.
- A110™ is used for custom residential projects with a contractor. What is the A110?
- A111™ is used when the builder performs construction only. What is the AI11?
- A112™ is used when the builder provides both design and construction. What is the A112?
- B110™ governs the relationship between the owner and architect.
These agreements align the project team on design, construction, and decision-making.
When Should You Use the B110 Agreement?
The B110 is best suited for projects where the owner engages an architect for design services.
Use B110 when:
- The project involves a custom residential design.
- The owner hires an architect separately from the contractor.
- The architect will provide services through construction administration.
- Design and construction are managed under separate agreements.
How Does the B110 Agreement Benefit Homeowners?
B110 Defines Design Scope and Process for Homeowners
For homeowners, the B110 clarifies what the architect is responsible for delivering. It defines the design phases, outlines deliverables, and establishes how decisions are made throughout the project. This helps owners understand what to expect at each stage.
B110 Enables Better Alignment During Construction
The B110 also defines the architect’s role during construction. This includes reviewing work, responding to questions, and ensuring the project aligns with the design intent.
How Does the B110 Benefit Architects?
B110 Defines Scope of Services for Architects
For architects, the B110 provides a structured framework for delivering services. It outlines responsibilities across each phase of the project, reducing ambiguity and helping manage expectations with the owner.
B110 Enables Stronger Architect Coordination with Construction
The agreement supports coordination between design and construction by clearly defining how the architect interacts with the contractor during the project. This helps maintain alignment as the project moves from design into execution.
Why the B110 Agreement Matters Early in the Project
Design decisions shape the entire project. When the agreement governing design services is clear from the beginning, teams can move forward with better alignment. The B110 establishes how the scope is developed, how decisions are documented, and how the architect supports the project through construction. Waiting to define these terms later can introduce confusion and inefficiency.
A Strong Foundation for Residential Design
Residential projects depend on thoughtful design and clear communication. The B110 provides a standardized approach to managing architectural services in custom residential construction. It supports better coordination, clearer expectations, and more consistent project outcomes.
Explore the B110 and the full suite of AIA residential contract documents.
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