Zillow Advice: Home Improvement - Will my property tax go up if I add onto my townhome's patio? http://www.zillow.com/advice-thread/Will-my-property-tax-go-up-if-I-add-onto-my-townhome%27s-patio/395206/ Zillow Advice | Zillow Real Estate The taxing authorities will ... http://www.zillow.com/advice-thread/Will-my-property-tax-go-up-if-I-add-onto-my-townhome%27s-patio/395206/ The taxing authorities will be aware of the improvement through the permitting process but it will unlikely change the taxable value as it is not a heated living area. You may, however, want to clear the improvement with the HOA before you spend a lot of money on planning, bidding and material...they may have a different take on your idea and all living in the development may have a say. Fri, 15 Apr 2011 18:01:00 GMT http://www.zillow.com/advice-thread/Will-my-property-tax-go-up-if-I-add-onto-my-townhome%27s-patio/395206/ 2011-04-15T18:01:00Z It might. Youll have to have ... http://www.zillow.com/advice-thread/Will-my-property-tax-go-up-if-I-add-onto-my-townhome%27s-patio/395206/ It might. Youll have to have it permitted, ask the permitting agency (city or county) for specifics. ALSO ask your taxing agency, the place you pay your property taxes to, they can tell you. <br/><br/>My guess is that if you are NOT adding and changing the livable square footage to your unit, your taxes will not go out. Fri, 15 Apr 2011 16:43:00 GMT http://www.zillow.com/advice-thread/Will-my-property-tax-go-up-if-I-add-onto-my-townhome%27s-patio/395206/ 2011-04-15T16:43:00Z