ADU Guide
Mighty Buildings

ADU Guide

Mighty Buildings
Mighty Buildings is a modular prefab construction company providing turn-key installation services. By utilizing 3D printing technology and our Light Stone Materials, we assemble modular houses faster than traditional construction. Our units are fully compliant with all aspects of the California Building Code, including Title 24 Energy and other standards.
We provide a turn-key solution for Accessory Dwelling Units (ADUs), which means we assemble the permit packages, get permits approved, pour the foundation, connect the utilities, and install the unit ourselves. Think of our turn-key solution as a one-stop shop
- Land Use Entitlements
- Building Permits
- Delivery & Installation
- Utilities Connections
- Foundation
- Financing
Earn up to $10,000 for every referral.
If you have any questions, request a call back and we’ll be happy to chat.
ADUs
ADU is an accessory dwelling unit, a detached or an attached building that goes into a backyard or a side yard of an existing residence. ADUs are usually built as a guest house or extra living space on the property for rental purposes or as a long term investment.
ADUs are an extension of your property so it does increase your property value. However, the property tax goes up insignificantly by the amount of construction costs added to the base of your assessment value.
ADU
Primary Residence
Do you have an existing house?
Yes
No
Timeline
60 days
4-8 months
Permits
Varies Heavily Between AHJ
Depends On The Jurisdiction
New ADU State Laws


On October 9th 2019, Governor Gavin Newsom signed a series of bills opening up ADU’s statewide. These bills went into effect on January 1st 2020 and dramatically loosened the restrictions for building ADUs throughout the state. The main purpose of these bills is to standardise the regulations for ADUs.
While these new laws have done a great deal of work in standardizing the accessory dwelling unit requirements statewide, local jurisdictions still have a lot of ability to control the types of ADUs in their area. For instance, design requirements may still be a factor in specific locations. Feel free to reach out to your Mighty Buildings representative to check specific properties for their local requirements.
Pre-approved plans/
Factory Built Housing

Factory Built Housing is exactly what it sounds like. It is a program put in place by California’s Department of Housing Community Development to allow the assembly and construction of portions, or the entirety of a construction project be built offsite as a method to reduce cost and weather delays. Once onsite and installed, there is essentially no difference between a Factory Built House and a traditional built house. These units are inspected at the factory, but installations are inspected by the local jurisdiction.
All our designs are reviewed at the State level and come with a pre-approval at the authoritative housing jurisdiction level. This means that when the permit package is submitted to the local jurisdiction, they only review site specific details, such as the foundation, utility connections, and installation plan for the unit, creating less confusion and much quicker straight forward plan review.
For more information on the Factory Built Housing Program refer to this HCD Manual.
Why Build an ADU?

The best time to build is now. ADU’s are an investment for your property and provide financial security in a slow housing market or economic downturn. In fact, an ADU can be one of the safest investments you can make. It is a direct investment into your current property and during a downturn, it can increase the value of your property. In addition to the sizable increase to your property, you can gain the potential rental income, which gives you a steady flow of income during unprecedented times.
Assumptions:
- + Purchase Price: $1,250,000
- + Down Payment: 10%
- + 30-year fixed
- + 3.50% interest rate


Benefits of ADUs?


How To Finance an ADU

Today, we partner with a number of lenders: Quicken Loans, Umpqua Bank, Patelco Credit Union. Our goal is to match our client's specific needs with one of our lending partners as each request is unique. There are a number of different loan options we use to provide funding to our client to finance their accessory dwelling unit.
- Home Equity Line of Credit
- Cash out Refinance
- Construction Loan
- Personal Loan
An Overview of MB Products
As previously mentioned, Mighty Buildings is a prefab modular builder. All of our models have been pre-approved at the State level by California’s Department of Housing and Community Development under the Factory Built Housing (FBH) program.
Mighty Duo B-shape
Footprint
700 Sq Ft
Dimensions
25' x 28'

Mighty House Trio
Footprint
865 Sq Ft
Dimensions
24' x 36'

Mighty House Quatro
Footprint
1152 Sq Ft
Dimensions
24' x 48'

Our Turnkey Process
MB tech advantages vs concrete 3D printing


Mighty Buildings uses 3D printing technology and proprietary Light Stone Material such as reinforced concrete, as an alternative to conventional building materials. Beyond the structural and other physical properties, the material replaces several layers of material as it can work as structural, exterior, and interior material.
Our Light Stone Material eliminates cold joints between layers, which occur when the specific temperature and humidity requirements for proper curing of concrete are not met. We are able to achieve this due to the rapid solidification of our material under UV light, thus avoiding the structural issues when the material is solid and subjected to loads. This rapid curing also allows the LSM to print in horizontal layers without a supporting structure, meaning we can print walls, floors, ceilings and more.
Other important qualities of the material:
- Fire resistant
- Hydrophobic
- Resilience
Mobile homes vs Modular
Mighty Buildings is considered a modular home builder which differs from traditional “mobile homes”. Mobile homes could serve a means of temporary housing solution whilst our 3D printing technology and unique composite materials are able to bring energy efficient buildings of a high quality and modern design to the market at a cheaper price point than traditional construction.
Modular construction is permanent real property and an appreciating asset. It serves as a long-term investment while mobile and manufactured homes will depreciate in value since they are not affixed to a permanent foundation.
Additionally, financing for modular construction works the same as traditional home or construction loan financing. Mobile homes are financed similar to other depreciating assets like RVs or boats.
- High quality
- Permanent real property
- Appreciating asset
- Long-term investment
- Traditional financing applied
Mighty Buildings provides
10 year
warranty on structural systems



1 year
fit & finish warranty on interior
finishes

Virtual Tours

Mighty Quatro

Mighty Trio

Mighty Duo B-shape
Videos
Earn up to $10,000 for every referral.
If you have any questions, request a call back and we’ll be happy to chat.