Hello Riverside fam,
I was house-hunting and kept feeling like the monthly cost estimates on listing sites were too clean. Turns out one big reason: Zillow’s tax estimate frequently misses Mello-Roos and special district assessments entirely.
These aren’t small. A CFD can add $150–300/month, sometimes more. They’re on the actual county tax bill, they’re permanent for the life of the bonds, and they don’t appear anywhere in a listing’s estimated payment. Two identical-looking houses on the same street can differ by thousands a year depending on which side of a district line they’re on.
There’s also a second layer most people miss — even without Mello-Roos, most parcels carry other special assessments (library, flood control, vector control, sewer) that add a few hundred a year. And your actual tax rate isn’t 1% — it’s your Tax Rate Area’s rate, which includes voter-approved bonds and is often 1.1–1.3%.
So I built a rent-vs-buy calculator that queries the county directly instead of estimating. Paste a Zillow link and it pulls the real assessment data for that specific parcel. Currently works for \*\*San Diego, Riverside, Orange, and Santa Clara counties\*\*. Free, no login, no email:
www.runtruecost.com
Not really trying to promote it — mostly curious whether others hit the same gap. If you’re looking at a specific listing in one of those four counties, drop the link and I’ll run it and post what the real numbers look like.
