O’Brien Wood & Iron

O’Brien Wood & Iron is a full-service design-build construction company based in Portland, Maine. Founded by Mat O’Brien in 2008, the company specializes in new construction, additions, remodeling, renovations, historic restoration, custom woodworking, and residential and commercial construction. Its in-house team combines design, estimating, construction, carpentry, and custom millwork to manage projects from concept through completion.

An accessory dwelling unit (ADU) — also known as a granny flat, in-law suite, backyard cottage, or secondary dwelling unit — is an independent living space located on the same property as a primary residence.

ADU Services

I would not classify O’Brien Wood & Iron as an ADU Builder based on the information currently published on its official website. Although the company provides residential additions, renovations, new construction, and design-build services, I could not verify a dedicated ADU service offering.

Its verified residential capabilities include:

1. Residential Additions: O’Brien Wood & Iron designs and builds additions to expand existing homes and improve their functionality.
2. Remodeling & Renovation: The company handles residential remodeling and renovation projects, including improvements to existing spaces.
3. New Construction: O’Brien Wood & Iron undertakes new residential construction projects as part of its design-build services.
4. Historic Restoration: The company has particular expertise in preserving and restoring older homes and historic architectural details.

What O’Brien Wood & Iron Offers Beyond Construction

O’Brien Wood & Iron operates with an integrated design-build model. Its in-house design team works alongside estimating and construction teams, allowing design decisions, budgeting, scheduling, and construction requirements to be coordinated throughout a project.

The company also operates its own custom woodshop in Portland’s West End, where it produces cabinetry, casework, architectural details, molding, millwork, and furniture. This allows the company to reproduce historic profiles and create custom architectural elements for residential and commercial projects.

Its broader services include:

• Residential construction
• Commercial construction
• Home additions
• Remodeling
• Renovations
• Historic restoration
• General contracting
• Architectural design services
• Custom cabinetry and millwork
• Custom furniture
• High-performance and sustainable building practices

The company emphasizes craftsmanship, high-quality materials, distinctive architectural details, energy-efficient construction, and customer service. Its team has expertise spanning historic preservation, residential carpentry, traditional boatbuilding, Passive House standards, and high-end residential design and construction.