Under California Building Standards Code Title 24, what is the maximum number of days a building permit remains valid without commencement of work?
Correct Answer
C) 180 days
California Building Standards Code Title 24 Section 105.5 states that building permits become invalid if work is not commenced within 180 days of issuance. This timeframe ensures projects move forward in a timely manner and prevents indefinite permit holdings that could affect local planning and code compliance.
Why This Is the Correct Answer
California Building Standards Code Title 24, Section 105.5 expressly states that a building permit becomes invalid if authorized work is not commenced within 180 days from the date of issuance. This ensures that approved plans remain current, that design standards have not changed, and that local planning capacity is not monopolized by dormant permits. The 180-day rule is uniform across California jurisdictions that have adopted Title 24.
Why the Other Options Are Wrong
Option A: 365 days
365 days (one full year) is not the statutory limit and would allow a permit to sit unused for an entire year. This might be confused with annual renewal cycles for certain licenses or the one-year period for some code compliance actions, but it is not the permit commencement deadline.
Option B: 720 days
720 days (two years) is far beyond the statutory limit and appears to be a distractor testing whether candidates know the actual short window. No California jurisdiction using Title 24 allows permits to sit unused for two years before expiration.
Option D: 90 days
90 days is shorter than the actual 180-day limit. While 90 days might represent a local jurisdiction's internal review period or a notice deadline in another context, it is not the Title 24 permit commencement window.
Memory Technique
180 is the number of degrees in a straight line — a permit that hasn't started work in 180 days has gone as far as it can in a straight line before it expires. Visualize a permit timeline as a 180-degree arc from issuance to expiration.
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