Accessory Dwelling Units (ADUs) have gained popularity as a solution to housing shortages and a means for homeowners to generate additional income. 

These secondary living spaces, also known as granny flats, in-law suites, or backyard cottages, require regular inspections to maintain their safety, functionality, and value. This guide explores the factors influencing inspection frequency and provides recommendations for property owners.

How Often Should An Adu Be Inspected?

An ADU should be inspected at least twice a year, ideally in spring and fall. However, monthly quick checks are recommended for catching obvious issues.

After severe weather events, conduct additional inspections. If the ADU is rented, inspect between tenants.

For older ADUs or those in harsh climates, more frequent inspections may be necessary. An annual professional inspection of major systems is also advisable.

ADU Inspections

ADU inspections serve several important purposes:

1. Ensuring occupant safety
2. Verifying compliance with local building codes and regulations
3. Identifying potential issues before they escalate
4. Maintaining the property’s value and structural integrity

There are three main types of inspections that an ADU may undergo:

1. Routine Maintenance Inspections: Regular check-ups to assess the overall condition of the ADU.
2. Safety Inspections: Focused on identifying potential hazards, such as fire risks or structural weaknesses.
3. Compliance Inspections: Ensure the ADU meets current local regulations and building codes.

A thorough ADU inspection typically covers various areas, including structural integrity, electrical and plumbing systems, HVAC, fire safety features, energy efficiency, pest control, and general maintenance.

Factors Influencing ADU Inspection Frequency

Several factors can affect how often an ADU should be inspected:

• Age of the ADU: Newer ADUs require less frequent inspections than older ones. As structures age, they become more susceptible to Wear and tear, necessitating more frequent inspections.
• Construction Quality and Materials: The quality of construction and materials used in building the ADU can significantly impact its durability and maintenance needs. Higher-quality materials and construction may allow for less frequent inspections, while lower-quality builds may require more regular check-ups.
• Local Regulations and Building Codes: Different jurisdictions have varying requirements for ADU inspections. Some areas may mandate annual inspections, while others might have more lenient schedules. It’s crucial to familiarize yourself with local regulations to ensure compliance.
• Occupancy Status: The frequency of inspections may differ depending on whether the ADU is owner-occupied or used as a rental property. Rental units often require frequent inspections due to higher tenant turnover and potential Wear and tear.
• Climate and Environmental Factors: ADUs in areas prone to extreme weather conditions, such as high humidity, frequent storms, or extreme temperature fluctuations, may need more regular inspections to address potential weather-related damage.

Recommended Inspection Schedules

While individual circumstances may vary, here are general guidelines for ADU inspection frequency:

For new ADUs (0-5 years old):

• Initial inspection: Immediately after construction
• Follow-up inspection: Within the first year to address any settling issues
• Regular inspections: Every 2-3 years, focusing on maintenance and potential warranty issues

For established ADUs (5-15 years old):

• Regular inspections: Every 1-2 years
• Focus on Wear and tear, updating systems, and ensuring compliance with evolving building codes

For older ADUs (15+ years old):

• Regular inspections: Annually
• Focus on Structural integrity, major system updates, and potential renovations or upgrades

Special Considerations for Rental ADUs

Rental ADUs may require more frequent inspections:

• Pre-tenant inspections: Before each new tenant moves in
• Annual inspections: To ensure ongoing safety and compliance
• Post-tenant inspections: After a tenant moves out to assess any damage or needed repairs

Signs That Your ADU Needs an Inspection

Regardless of the recommended schedule, certain signs indicate that your ADU needs an immediate inspection:

Visible Structural Issues:

• Cracks in walls, ceilings, or foundations
• Doors or windows that don’t close properly
• Sagging rooflines or uneven floors

Plumbing or Electrical Problems:

• Frequent power outages or circuit breaker trips
• Leaky faucets or pipes
• Poor water pressure or drainage issues

Energy Efficiency Concerns:

• Unexplained increases in utility bills
• Drafts or inconsistent temperatures throughout the ADU

Changes in Local Regulations:

• New building codes or zoning laws affecting ADUs
• Updated safety requirements for rental properties

Benefits of Regular ADU Inspections

Regular inspections help preserve and increase the value of your ADU by identifying and addressing issues early on. For rental ADUs, regular inspections demonstrate a commitment to tenant safety and comfort, potentially leading to longer tenancies and positive reviews.

Catching small issues before they become major problems can save significant money in the long run. Additionally, staying up-to-date with inspections helps ensure your ADU complies with local regulations, avoiding potential fines or legal issues.

Conclusion

The frequency of ADU inspections depends on various factors, including age, construction quality, local regulations, occupancy status, and environmental conditions. While general guidelines suggest annual inspections for older ADUs and less frequent check-ups for newer ones, it’s essential to tailor your inspection schedule to your specific situation.

Regular inspections are a crucial aspect of responsible ADU ownership. They help maintain safety, value, and compliance. You can ensure your ADU remains a valuable asset for years by staying proactive with inspections.

Don’t wait for problems to arise – schedule an inspection with a qualified professional today to assess your ADU’s condition and develop a personalized inspection plan. Your future self (and potentially your tenants) will thank you for your diligence in maintaining a safe and comfortable living space.