Golden Horizon Builders More Space. More Opportunity.
Modern Southern California home with warm interior lighting at dusk

ADU Construction Pricing

From Permits to Finished ADU — We Handle the Process.

Building an ADU doesn't have to be complicated. ADU Specialist helps homeowners navigate the process from permitting and planning coordination through construction and final finishes. We aim to make the experience straightforward, transparent, and tailored to your property and goals.

ADUs Starting at$275Per Square Foot

Explore your options and receive a project estimate tailored to your property, needs, and vision.

What's Included in the Process?

From Permits to Finished ADU

We help coordinate the key stages of your ADU project, from the initial planning process through construction and finishing. Our goal is to provide a streamlined experience with clear communication throughout the project.

Builder reviewing ADU architectural plans
01

Consultation & Planning

We discuss your goals, budget, property, and ideal ADU design.

02

Design & Engineering Coordination

We coordinate the plans and professional services needed to prepare your project for approval.

03

Permits & Approvals

We coordinate the applicable permitting process and required approvals with the relevant authorities.

04

Site Preparation & Construction

We coordinate construction from site preparation and foundation work through framing and building systems.

05

Interior & Exterior Finishes

We progress through installation of finishes, fixtures, and other agreed-upon project features.

06

Final Walkthrough & Handover

We review the completed work and coordinate applicable final inspections, approvals, and project handover.

Bright modern ADU interior with open living space
What Affects Your ADU Price?

Pricing Tailored to Your Project

Every property is different. Your final ADU construction price depends on several factors, including:

Size and Layout

Square footage, number of rooms, and building configuration.

Project Type

Detached ADUs, attached units, and garage conversions.

Site Conditions

Grading, foundation requirements, accessibility, and existing utilities.

Design & Materials

Cabinetry, countertops, flooring, fixtures, appliances, and finishes.

Permits & Professional Services

Required plans, engineering, applications, and applicable fees.

Utility Work

New connections, upgrades, and service capacity requirements.

Our team will help identify the requirements that may affect your project budget and prepare a project-specific estimate.

Our advertised starting price is $275 per square foot. Final pricing depends on the project's size, design, site conditions, materials, and construction scope.
We coordinate the process from permitting and planning through construction and finishing, based on the services outlined in your project agreement.
The starting price should not be assumed to include all permit fees, architectural services, engineering, or other project costs. Your written estimate will clarify what is included and what may be additional.
Timelines vary based on project complexity, approvals, site conditions, material availability, and construction requirements. Visit our Construction Timeline page to learn more.
Contact us with your property location, preferred ADU size, project type, and goals. We'll discuss your needs and the next steps toward preparing a project-specific estimate.
Backyard accessory dwelling unit beside a pool in Southern California

Your ADU, From Start to Finish.

From permits to the final finishes, ADU Specialist helps you navigate the process of creating additional space for your property. Let's discuss your vision and explore the options available to you.

ADU Specialist is a brand of Golden Horizon Builders.