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State and local laws make it easier than ever to build an ADU. Build a separate and legal unit for rental income or for your family. You can now add an ADU to your apartment building too!

Increase Your
Property Value

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A rental apartment and earn monthly income

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A mother-in-law unit

A home office

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A rec room, space for kids, extra room for your family


Garage Conversion

400 SF
1 Bedroom

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New Construction

900 SF
1 Bedroom | 2 Bathrooms

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Addition + Conversion

450 SF
1 Bedroom | 1 Bathroom

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What We Do

Building Blocks Provides:

  • Architecture & Design
  • Engineering
  • Creative Utility Solutions
  • City Permitting
  • High-Quality Construction
  • Responsiveness & Reliability
  • Local Market Expertise
  • Strong Communication
  • Unmatched Customer Service


Accessory dwellings offer one solution to the affordable housing problem

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Well-designed rentals L.A. can afford. That’s the mission of the Backyard Homes Project

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Hungry for disruption.

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Meet Our Team

Portrait of John Perfitt

John Perfitt

John Perfitt is a real estate professional with 30-plus years of working on all aspects of housing in Southern California including permitting, designing, and building myriad housing typologies.  John’s passion is ADUs and his experience and success with building ADUs is extensive.  

Bill Isbell

Bill Isbell is a construction industry professional who thrives on the process of residential construction and the reward of delivering high-quality and attractive living spaces.  Bill enjoys working with our customers and stakeholders to design solutions when challenges arise while still delivering projects on-time and on-budget.

Our Happy Clients

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aN ADU Proposal

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