ADU CONSTRUCTION
More space.
One accountable team.
From approved plans to final inspection. ATP coordinates ADU construction with the planning, communication and oversight your project deserves.
Every Successful ADU Project Starts With the Right Team.
An accessory dwelling unit can create independent living space for family, guests, or other permitted uses. Turning that idea into a completed build takes careful coordination between plans, site conditions, permitting, trades, and construction.
ATP manages residential construction with an integrated approach, connecting project planning, construction coordination, and execution to keep decisions and responsibilities aligned.
Discuss Your ADU Project ↗Complete ADU Construction Solutions.
Whether you're planning a detached unit, an attached addition, or a garage conversion, the right construction approach starts with understanding your plans, property, and project scope.
Ground-Up ADU Construction
Construction of a separate residential unit, coordinated around approved plans, site conditions, foundations, framing, building systems, and finishes.
Attached ADU Construction
Additional living space connected to an existing residence, with construction coordinated around the home's structure and project documentation.
Garage Conversions
Transforming an existing garage into living space where feasible, with scope determined by structural conditions, utilities, plans, and applicable requirements.
Construction That Moves Projects Forward.
A successful ADU build needs more than a set of plans. It needs clear scope, coordinated trades, organized scheduling, and accountability from start to finish.
One Coordinated Team.
Construction, trades, scheduling, and communication stay connected throughout the project.
Clear Project Management.
Milestones, materials, subcontractors, and inspections are coordinated around the project scope.
Design + Construction.
ATP's connection between design and construction helps align plans with practical build requirements.
Built for Long-Term Performance.
Attention to construction quality, coordination, and details supports a durable finished project.
From Approved Plans to Completion.
Our construction process keeps each phase connected, with a clear understanding of the scope, responsibilities, and next steps before work moves forward.
Review Your Project
We discuss your goals, property, plans, scope, budget considerations, and timeline.
Define the Scope
We review available project documentation and develop a construction proposal based on the agreed scope.
Coordinate Approvals
Required permits and city approvals are coordinated before construction begins.
Prepare the Build
Scheduling, materials, subcontractors, and site preparation are organized for the project.
Manage the Work
Construction activities and trades are coordinated throughout the build, with attention to progress and quality.
Final Walkthrough
Final inspections, walkthroughs, and completion items bring the project toward handoff.
Already Have Plans? Let's Talk Construction.
ATP can review your available plans and discuss the construction scope, project requirements, and next steps. Design and construction are separate engagements, so you can discuss the services you need for your project.
Request a Construction Proposal ↗ADU Construction FAQ.
Answers to common questions about planning and building an accessory dwelling unit with ATP.
What types of ADU projects does ATP handle?
ATP's construction services include ADU builds. The appropriate construction approach depends on the project, plans, site conditions, and agreed scope.
Can ATP build from plans prepared by another architect?
Yes. ATP can review existing plans and discuss the construction scope and next steps for your project.
Can ATP coordinate permits and inspections?
ATP coordinates permitting and inspections as part of its construction process. Specific responsibilities and requirements are confirmed for each project.
How much does it cost to build an ADU?
Costs depend on size, site conditions, design, utilities, materials, finishes, and project requirements. ATP can discuss a construction proposal after reviewing the project scope.
What areas does ATP serve?
ATP serves Pasadena, Altadena, and surrounding Southern California communities. Contact the team to discuss your property location.
Ready To Build?
Let's discuss your project, timeline, budget, and next steps.
SCHEDULE A CONSULTATION