Sixth Street ADU Project

A comprehensive residential expansion featuring a home addition, detached ADU, and attached two-car garage designed to increase living space and create long-term rental income.

Project Overview

Cozy bedroom with striped bedding, yellow pillow and blanket, wreath decor, and mirrored closet doors reflecting the room.

The Sixth Street project was designed to help the homeowner maximize their property's potential through a significant residential expansion. The project included approximately 700 square feet of new living space added to the existing home, along with a 500-square-foot detached Accessory Dwelling Unit and an attached two-car garage of approximately 500 square feet.


The homeowner's primary objective was to create additional living space while developing a separate ADU that could generate rental income and help offset their mortgage. Through careful planning and quality construction, CoreFrame Builders transformed the property into a more functional, valuable, and income-producing investment.

Project Goals

The homeowner wanted to expand their existing residence while adding a detached ADU that would provide long-term flexibility and an additional source of rental income. Every aspect of the project was planned to improve the property's functionality without compromising structural integrity or long-term performance.



Beyond creating additional square footage, the project focused on delivering durable construction, code-compliant improvements, and thoughtfully designed spaces that would continue serving the homeowner's needs for years to come.

Scope of Work

Cozy living room with TV, wooden furniture, plants, and open door to a sunny patio

CoreFrame Builders carefully coordinated every stage of construction while addressing unforeseen structural conditions uncovered during the project.


Project highlights included:

  • Approximately 700-square-foot home addition
  • Approximately 500-square-foot detached ADU
  • Approximately 500-square-foot attached two-car garage
  • Structural reconstruction and repairs
  • Foundation repair and reinforcement
  • Conventional wood framing
  • Engineered roof truss system
  • Exterior stucco installation
  • Composition shingle roofing
  • Interior construction and finishing
  • Final project completion

Every phase was completed with an emphasis on structural integrity, quality craftsmanship, and long-term durability.

Construction Challenge

One of the most significant challenges emerged after construction began. The team discovered evidence of a previous kitchen fire that had been concealed during earlier work, leaving hidden structural damage that the homeowner was unaware of.


In addition to reconstructing the affected structural framing, the project required extensive foundation repairs after portions of the existing foundation were found to be deteriorating and crumbling. CoreFrame Builders carefully repaired and reinforced these areas, rebuilt damaged structural components to current building code requirements, and ensured the entire structure was safe, stable, and prepared to support the new addition and detached ADU.

Open living room and dining area with a round table, stools, couch, TV, and shelves in warm neutral tones
Bright living room with white kitchen, refrigerator, sofa, and dark wood flooring

Materials & Construction

To provide long-term performance and maintain consistency with the existing home, the project utilized durable residential construction methods and materials throughout.


Construction included:


  • Conventional wood framing
  • Engineered roof truss system
  • Exterior stucco finish
  • Composition shingle roofing
  • Professionally finished residential interiors


These materials were selected to create a cohesive appearance while providing the strength, durability, and performance expected from a high-quality residential construction project.

The Finished Result

Completed approximately two years ago, the Sixth Street project successfully transformed the property through a thoughtfully planned home addition, detached ADU, and attached garage. By overcoming hidden structural damage and repairing the deteriorating foundation, CoreFrame Builders delivered a safe, code-compliant, and fully functional residential expansion built for long-term value.


Today, the homeowner benefits from approximately 700 square feet of additional living space, a 500-square-foot detached ADU, and a 500-square-foot attached two-car garage. The completed ADU provides new opportunities for rental income while increasing the property's overall functionality, versatility, and investment potential.

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Looking to Expand Your Property?

Whether you're planning a detached ADU, home addition, garage construction, or a complete residential expansion, CoreFrame Builders can help you navigate every stage of the process with confidence. From planning and structural evaluation to construction and final completion, our team delivers organized project management, transparent communication, and quality craftsmanship designed to maximize your property's long-term value.