What does the law say?
Property Tax Rule 463(b)(4) excludes construction for normal maintenance and repair, naming "replacement of roof coverings," from new construction. The BOE adds that replacing a shake roof with a tile roof isn't new construction, so any resulting increase in market value isn't assessable.
When could roof work be reassessed?
When it's part of new construction: adding square footage, a second story, or a rebuild that makes the structure the substantial equivalent of new. Only the new construction is assessed, not the whole home (BOE).
Do I need to tell the assessor?
Building permits are generally shared with the county assessor. A reroof permit alone shouldn't change your assessed value under Rule 463.
For your actual price, request a free written estimate: a licensed roofer measures the roof and prices your exact scope.
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Get a free replacement quoteFrequently asked questions
Will a new roof increase my assessed value?
Generally no. Replacing roof coverings is normal maintenance under Rule 463.
Does switching from shake to tile change my taxes?
The BOE says replacing a shake roof with tile is routine maintenance, not new construction.
What roof work can be reassessed?
Work that is part of new construction, such as an addition; only the new portion is assessed.
Sources
Sources reviewed November 12, 2026. Figures are published estimates and official fees, not quotes. Confirm prices, permits and requirements with your contractor and building department. This page is general information, not legal or insurance advice.