How Much Does An ADU Cost?

Accessory dwelling unit or ADU construction cost can easily be estimated. TRUPLANS INC has been working with homeowners and contractors for years providing accurate pricing for custom accessory dwelling units. Whether it is for a new accessory dwelling unit or legalizing an existing structure we can help.

What categories of ADU projects do we estimate?
There different types of ADUs; custom, prefab, prespec, mobile and modular homes. They are also referred to sometimes as a granny flat, in-law suite or a backyard home. Truplans Inc provides planning services for all cetgories, however, we only estimate construction costs for custom and/or prespec ADUs. In the future we may provide prefab ADU construction estimates as well.

How Can a Planning Company (TRUPLANS INC) Provide ADU Construction Estimates?
Our team has been providing construction estimates since 2004 for multiple contracting companies. In 2020 we currently provide an authorized estimating service for several contracting companies today. Since we know your project initmately we are able to provide accurate estimates for accessory dwelling units as well as other types of construction. However, we do not provide competing bids between the contractors we provide this service for.

Overview of Prefab and Custom ADU construction estimates;
Prefab ADU and Custom ADU cost
The cost of custom accessory dwelling units will vary widely depending upon;

• the size of your ADU
• whether it is custom or prefabricated
• the property it is being built on
• the features you desire
• HOA requirements
• local city and planning department planning requirements
• the company you contact
• the experience level and quality among different contractors
  
  

Prespec ADU Cost Option
TRUSPEC-ADU is an ADU brand introduced by TRUPLANS INC and is categorized as a prespec ADU system that removes some of the variables associated with both custom and prefab ADU choices.

A Prespec ADU is a feasible price option for accessory dwelling unit’s plans and construction for a completed, fully equipped finished product. The only thing you really need to supply afterwards is your own choice of paint options and furniture.

How Much Does an ADU cost?
1. ONLINE ESTIMATE REQUEST (fairly accurate) - fill out the online estimate request form.

ONLINE ADU ESTIMATE

2. HOME EVALUATION (most accurate) - click or call TRUPLANS/TRUADDITIONS 714.289.4652​

HOME ADU EVALUATION