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Transforming an as-built structure into a Permitted ADU: What you need to know


Modern tiny house with open glass doors, wooden deck, and cozy chair. Trees and a wooden fence surround the serene evening setting.

A Step-by-Step Guide to Legalizing Your ADU


Many homeowners have structures on their lot that can be legalized and turned into full ADUs. While these structures are often not up to code, they can be cleaned up and permitted.This guide will show you how to legalize an existing structure, and EG Modern Construction will help you through the process easily and hassle-free.


What Is an As-Built Structure?


It is a building built without permits that may not meet current codes. Typical examples of as-built structures that can be converted into permitted ADUSs are:


  • Re-equipment of garages without permission

  • Guest houses or cottages in the backyard

  • Apartments on the ground floor

  • Barns or detached buildings


Legalizing an ADU will allow it to be used legally, safely and for maximum benefit.


How to Legalize an As-Built Structure into a Permitted ADU Condition


Assessment

Inspect structural integrity and safety.


  • Identify code violations (electrical, plumbing, ventilation).

  • Determine necessary upgrades.

  • At this stage, it is best to contact a professional.


Consultation with a professional

The legalization process can be complicated, so it's important to work with an experienced contractor.


At EG Modern Construction, we can help you:


  • Understand local ADU regulations.

  • Find the best solutions to bring your building up to code.

  • Prepare a compliant plan.


Obtaining permits

To legalize ADUs, you need to apply to the building department:


  • Building permits - safety inspections.

  • Utility permits - electrical, plumbing, ventilation.

  • Zoning - if required by local codes.


Permits can take time, best to start the process early.


ADU modernization

Once permits are obtained, you need to bring the structure up to code:


  • Upgrade electrical and plumbing.

  • Add insulation and ventilation.

  • Install fire protection measures (smoke detectors, emergency exits).

  • Reinforce the structure for durability.


Inspection and Final Approval

Mandatory inspections are conducted prior to final approval of the ADU:


  • Structural safety

  • Electrical and plumbing code compliance

  • Fire Protection


After successful inspections, the ADU becomes fully legal.


Benefits of legalizing an ADU


  • Increased property value - A legalized ADU increases the price of a home when it is sold.

  • Rental income - The ability to legally rent out the home and make a profit.

  • Compliance with the law - Avoiding fines and inspection problems.

  • Flexibility of use - Housing for family, guests, or renters.


How EG Modern Construction Can Help


At EG Modern Construction, we specialize in legalizing and converting existing buildings into fully compliant with ADU requirements. Our team will guide you through each stage, including:


  • The initial assessment of the property to determine the feasibility

  • Applying for a permit and complying with city regulations

  • Modernization and modifications to bring the structure in accordance with the requirements of the legislation

  • Final inspections and approval to ensure compliance with requirements


We make the process smooth and trouble-free, helping you maximize the potential of your property with a fully legitimate ADU.


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