Legalizing Unpermitted Construction: What Homeowners and Business Owners Need to Know

Unpermitted construction is more common than most people realize. Home additions, garage conversions, ADUs, tenant improvements, and even structural modifications are often built without proper permits, sometimes by previous owners or contractors who took shortcuts.

If you are dealing with unpermitted construction, the good news is that it can often be legalized with the right team and approach.

At Monterra Consultants, we specialize in legalizing existing construction, preparing as-built plans, coordinating with Building & Safety, and guiding projects through inspections and approvals.

Common situations we help resolve:

• Unpermitted ADUs or garage conversions

• Unapproved structural changes

• Commercial tenant improvements built without permits

• Stop-work notices

• Failed inspections

• City violations and correction notices

Common situations we help resolve: Legalizing Unpermitted Construction

• As-built architectural plans

• Structural assessment and calculations

• Engineering corrections where required

• Coordination with city departments

• Special inspections and materials testing

• Final sign-off and permit approval

  
  

Searching for help with unpermitted construction legalization, as-built plans, or engineering for existing construction? Monterra provides everything under one roof to minimize delays, rework, and unnecessary costs.