Los Altos, Dallas County: property tax data
What the public appraisal record actually shows for this neighborhood — and how to use it if your own home's value looks too high.
Los Altos by the numbers
25th to 75th percentile appraised value spread
Source: Dallas County appraisal datadata as of August 1, 2026
What this means for a protest here
Look at the full range before you look at any single figure. Among Los Altos properties that actually clear the bar for a protest case, the increase in estimated value being challenged runs from a fraction of a percent up to 50% at the top end, while the middle of that same group sits at 7%. Those two numbers next to each other say something specific about this neighborhood: a handful of properties carry an outsized case, while the bulk cluster much closer to that median. That comparison isn't drawn from a handful of nearby lots — it's measured against 1,876 comparable parcels inside Los Altos with enough data to run the same math a homeowner's own address would use.
Not every property here has a case at all. Based on that same comparable pool, 28% of evaluable parcels in Los Altos show a protest case under this method, meaning most don't — worth knowing before spending time on one. Part of why the reduction range is so wide is that home values vary sharply within the neighborhood: price per square foot among comparable Los Altos homes swings from $43 to $494, a gap wide enough that two houses at opposite ends of it are barely comparable at all. Los Altos also merges two county geo codes, 4DSE29 and 4DSC04, into a single page, and at 2,287 parcels combined, it's one of the larger neighborhoods covered in this data pull.
How filing a protest actually works
Your deadline to file a written protest is whichever comes later: May 15, or the 30th day after your appraisal district delivers your notice of appraised value. There's no single date that applies to everyone — it depends on when your own notice arrives, not a date any page can print in advance.
A protest based on unequal appraisal compares your property against similar, nearby homes in this same neighborhood. LoneStarLower prepares that comparison and the supporting materials; it does not file the protest, negotiate with the appraisal district, or represent you at a hearing. You file it, using Form 50-132 or an equivalent written notice, with your county's appraisal district office — not the Texas Comptroller, which doesn't handle individual protests. You attend the hearing and present the evidence yourself.
Questions about this data
How many homes in Los Altos actually have a protest case, based on this data?
Out of 1,876 comparable Los Altos parcels with enough data to evaluate, 28% show a protest case under this method, using Dallas County appraisal data dated August 1, 2026. That leaves most parcels without one — worth knowing before deciding whether to look into a protest for a specific address.
Why is the reduction percentage such a wide range — from close to zero up to 50%?
Among the 522 Los Altos parcels with a case, the increase being challenged ranges from a fraction of a percent up to 50%, with the midpoint of that group at 7%. Wide spreads like this line up with uneven home values across a neighborhood — Dallas County's August 1, 2026 data shows price per square foot on comparable Los Altos homes running from $43 to $494.
Why does the Los Altos page combine two geo codes?
Dallas County's records track this neighborhood under two separate geo codes, 4DSE29 and 4DSC04, in the August 1, 2026 appraisal data. This page merges both into one 2,287-parcel neighborhood so the comparable pool behind these numbers covers the full area instead of half of it.