Modtec Homes builds modern prefab ADUs—granny flats, rental units, home offices & guest suites. Up to 90% factory-built for faster timelines & fixed pricing. Models include 1-bed Haven & 2-bed Cornerstone. Energy-efficient, code-compliant construction.

Modtec Homes – ADU Contractor in Sandy Springs, GA

About Modtec Homes

Adding Space and Value with a Backyard ADU from Modtec Homes

Modtec Homes specializes in the design and construction of modern Accessory Dwelling Units (ADUs), offering property owners a practical way to add space, functionality, and long-term value to their homes. Whether the goal is a rental unit, a guest suite, a home office, or housing for a family member, Modtec Homes works as an experienced ADU builder to bring those plans to life.

An accessory dwelling unit is more than just additional square footage — it can serve a range of purposes depending on the homeowner's needs:

  1. Rental income: A self-contained unit can be rented out to generate passive income and help offset mortgage costs.
  2. Guest accommodation: Providing visitors with a private, comfortable space separate from the main home.
  3. Home office: A dedicated workspace away from the distractions of the main house.
  4. Family housing: A suitable living arrangement for aging parents or young adults seeking independence while staying close.

A Factory-Built Approach to ADU Construction

Modtec Homes takes a different approach compared to traditional on-site construction. Up to 90% of each ADU is built in a controlled factory environment, which reduces noise, mess, and disruption to the property during the build process. This method also allows site preparation and manufacturing to happen simultaneously, making the overall timeline significantly shorter than conventional construction.

Another advantage of this approach is cost predictability. Because much of the work happens in a factory setting, the variables that typically lead to budget overruns in traditional builds are reduced. Modtec Homes provides a firm, fixed price, giving clients greater financial clarity from the outset.

As a detached ADU builder working with a prefabricated model, Modtec Homes positions itself as a granny flat builder and backyard cottage builder that prioritizes efficiency without compromising on quality or code compliance.

ADU Models Offered by Modtec Homes

Modtec Homes offers a selection of pre-designed, code-compliant ADU models built with energy-efficient systems and durable finishes. Each unit is constructed on a commercial-grade steel frame.

The Haven (1-Bedroom ADU)

This model is suited for individuals, couples, or parents and adult children. It includes an open-concept living area with a full kitchen, a spacious bedroom, and a modern bathroom. Smart home technology and energy-efficient systems are standard features.

The Cornerstone (2-Bedroom, 2-Story)

At 796 square feet, this two-story model is designed for couples or small families. The two-story layout maximizes living space on a smaller footprint and includes an open-concept living area and two full bathrooms.

The process Modtec Homes follows is structured into four stages:

  1. Consultation and Needs Assessment: An initial conversation and property visit to evaluate feasibility, zoning requirements, and placement options.
  2. Design and Permitting: Finalizing design selections and managing the permit application process with the local municipality.
  3. Manufacturing and Site Preparation: Simultaneous foundation and utility preparation on-site while the unit is manufactured in the facility.
  4. Delivery and Installation: The completed ADU is delivered, craned into position, connected to utilities, and finished for occupancy.

Modtec Homes offers an initial consultation to help property owners understand what is possible for their specific site and to outline a clear path forward for their ADU project.

Services

Modtec Homes performs the following services

  • Architecture & Design
  • Permit Specialist
  • Construction
  • Feasibility & Site Assessment
  • Finishing & Fit-out

Modtec Homes Reviews

Lisa Williams, Ed.S

2023-07-08

Tony BA Mckee

2022-08-17
"Jeff Davis"

Zoe Haze

2021-11-13
"UI very user friendly!"

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Specifics

Prefab Specialist Eco-Friendly

Opening hours

Monday 8:00AM - 6:00PM
Tuesday 8:00AM - 6:00PM
Wednesday 8:00AM - 6:00PM
Thursday 8:00AM - 6:00PM
Friday 8:00AM - 6:00PM
Saturday 9:00AM - 4:00PM
Sunday -

Location

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