Find Your Perfect Custom Shed

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1. ObservedJul 1, 2026Conversation1 turnsPlacementAfter turn 01 turns · After turn 0Replay chat
   Observed conversationJul 1, 2026 · interface recreation

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   I want to convert my attached garage into an ADU or in-law suite. What are the first things I need to figure out?

   Converting an attached garage into an ADU (Accessory Dwelling Unit) or in-law suite can be a great way to add living space or rental income, but the feasibility depends much more on local rules and the existing structure than on the construction itself.

   The first things to figure out are:

   1. Whether it's legal where you live

      • Does your city or county allow ADUs?
      • Are attached garage conversions permitted?
      • Are there owner-occupancy requirements?
      • Can the ADU be rented long-term or short-term?
      • Are there parking replacement requirements when converting a garage?

   2. Your zoning and property constraints Check:

      • Zoning district
      • Lot size and setbacks
      • Maximum ADU size
      • Height limits (if you plan to add above the garage)
      • Historic district or HOA restrictions, if applicable

   3. Whether the garage structure is suitable A contractor or structural engineer can assess:

      • Foundation thickness (garage slabs are sometimes too thin for living space)
      • Ceiling height
      • Roof condition
      • Wall framing
      • Moisture issues
      • Whether the garage floor needs to be raised to meet code

   4. Utilities Determine how you'll provide:

      • Plumbing (bathroom and possibly kitchen)
      • Electrical service
      • Heating and cooling
      • Water heater
      • Sewer connection
      • Internet/cable if desired

   5. Building code requirements Living space has stricter requirements than garages, including:

      • Insulation
      • Fire separation from the main house
      • Emergency escape windows (for bedrooms)
      • Natural light and ventilation
      • Smoke and carbon monoxide detectors
      • Energy code compliance

   6. How you'll use the space Your design will differ depending on whether it's:

      • An in-law suite for family
      • A rental ADU
      • A guest suite
      • A caregiver unit
      • A home office with a bathroom

   7. Budget Garage conversions vary widely depending on location and scope. In many parts of the U.S., attached garage conversions commonly range from roughly $80,000–$200,000+, especially if you're adding a full kitchen, bathroom, and significant utility upgrades.

   8. Financing and return on investment Consider:

      • Expected rental income (if applicable)
      • Property value increase
      • Financing options (HELOC, renovation loan, cash, etc.)

   Before spending money on plans

   A good sequence is:

   1. Verify local ADU rules.
   2. Confirm zoning and permit requirements.
   3. Measure the garage and inspect its condition.
   4. Develop a rough budget.
   5. Meet with a designer or architect familiar with ADUs in your area.
   6. Obtain contractor estimates.
   7. Prepare construction drawings and apply for permits.

   If you tell me:

   • your city and state (or ZIP code),
   • whether it's attached or detached,
   • the approximate garage size (e.g. 20×20),
   • and whether you want it for family or as a rental,

   I can walk you through the specific regulations, likely costs, and potential issues for your property.

   

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