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01Check your assessment

Is your commercial property over-assessed?

Corriden compares your assessed value to the median of comparable properties on the public appraisal roll — the same equal-and-uniform math Texas law uses — then builds the evidence packet you file yourself.

Built on public appraisal-roll data · Texas Tax Code §41.43(b)(3) · flat fee — we never take a cut, whatever happens

What you actually get

6 pages · see the full sample unequal-appraisal evidence packet. The cover shown is a worked illustrative example, not a real parcel.

Worked illustrative example — informational estimates from public appraisal-roll data, not an appraisal. You prepare and file your own protest.

Try it — your numbers

Demo medians shown — your real packet is computed from your county’s actual appraisal roll.

Inputs

From your county appraisal notice

1,000500,000 sq ft

Asset class
County

Your assessed value works out to $170.40/SF

At the Retail comp median ($148/SF)

Potentially ~$12,111/yr too much in tax

Your $4,260,000 assessment is +13.1% above the median of comparable retail properties — about $560,000 of value.

Assessed value vs. the comp median

County’s assessed value$4,260,000
At the comp median$3,700,000
$560,000 value

What each fee structure would cost on this scenario

What Corriden charges

$749paid once

0% of any reduction — a flat fee does not move with the result ($2M – $5M band).

A 40% contingency firm

$4,844per year

Charged again every year the firm handles the account, out of the owner’s money.

An illustrative comparison of pricing models — not a quote, and not a prediction of any result. The 40% figure applies a publicly posted contingency rate to this scenario’s difference; a percentage is charged again in each season the firm handles the account, while a flat fee is not. Corriden charges a flat fee only and is never a percentage of any reduction. How the two models compare

Contingency rates as published by each firm: O'Connor 50% · NTPTS 50% · Five Stone 50% · Texas Protax 40% · PropertyTax.io 35% capped · Ownwell 25%.

If the number looks real, the packet gives you the comp grid, the median math, and the §41.43(b)(3) argument — you file it with your county by May 15 (or 30 days after your notice, whichever is later).

After you file — three steps

  1. 1File the packet

    Forms and a county filing guide included; most large districts accept the filing through their online owner portal.

  2. 2Informal review

    Districts often resolve equity protests at this stage, on the math.

  3. 3ARB hearing, if needed

    A short session with the Appraisal Review Board; the packet is your script.

Rather not attend? Owners who prefer it hand the packet to any agent they hire — Corriden itself never files or represents you.

Illustrative estimate — see Methodology

Illustrative estimate — not an appraisal or tax advice. You prepare and file your own protest.

Run this on your county’s real roll — find your parcel

Packets from $299, flat — the Season Pass covers the whole season.

Received a new or corrected appraisal notice recently? Your protest window may be open now, whatever the 2026 general deadline was — §41.44 runs to 30 days after your notice was delivered, and property added to the roll by supplemental record carries its own notice and window. Check the date on your notice, then read what a supplemental notice means.

2026 window closed · next general deadline May 15, 2027

Get the reminder before the 2027 notices.

The general deadline to protest a 2026 assessment — May 15, 2026 under Tex. Tax Code §41.44 — has passed; the next is generally May 15, 2027, and your own date can move if your notice arrives late. Watching a parcel is free: you get its comparison against the submarket median on the current roll, an email when the county publishes the 2027 roll, and a reminder before the window closes. Unsubscribe any time.

Set a free reminder

Find the parcel first — the reminder attaches to it. No account, no card.

Three numbers that frame the decision — one from the sample packet, two from the public record

$15,354/yr

potential tax effect found in the illustrative sample packet

68%

of protests heard by the Harris County Appraisal Review Board — Texas's largest — won a reduction (2024)

25–50%

what contingency firms take of any savings, every year — Corriden is a flat fee

Sample figures are a worked illustrative example, not a projection or guarantee. ARB figure: from published Harris County protest-outcome data (2024).

03Methodology

The math is the argument — in plain English.

Texas law says your assessment must be equal and uniform: no higher than the median of comparable properties, adjusted for differences like size and age (Tax Code §41.43(b)(3)). That median is a number anyone can compute from the public appraisal roll — so the winning argument is the math itself. Here’s the sample packet’s chain.

From assessed value to the ask (illustrative)

  1. 01

    Your $/SF — assessed value ÷ building size

    $170.40

  2. 02

    Pull comparables — same class, submarket, size band

    35 comps

  3. 03[a]

    Adjust — documented size/age adjustments

    size + age rules

  4. 04[b]

    Take the median — the law's own test

    $142.00/SF

  5. 05

    The ask — median × your size

    $3,550,000

    −$710,000 → ≈$15,354/yr

Numbers are rounded for display. The chain shown is the sample packet (CP-2607-031) — a 25,000 SF retail strip in Fort Worth assessed at $4,260,000. Your packet runs the same chain on your parcel, straight from the county roll. Illustrative estimate — not an appraisal or tax advice. You prepare and file your own protest.[c]

Public data in, packet out

01

Public roll data in

The county's own numbers — assessed values, building sizes, class and submarket codes — downloaded in bulk from the public appraisal roll.

02

Same inputs, same answer

Every comp, every adjustment, and the median are printed — so your consultant, or the county, can re-run it.

03

A packet you file yourself

The comp grid, the median study, the written statute argument, and the requested value — ready for you to sign and file.

  1. [a]Comparables and adjustments follow documented, deterministic rules — every comp and every adjustment is printed in the packet.
  2. [b]Tex. Tax Code §41.43(b)(3): a protest must be resolved for the owner unless the district shows the value is at or below the median of comparable properties, appropriately adjusted. Equity here means compared against similar properties, not against the market.
  3. [c]Corriden provides software and evidence, not representation: we never file, appear, or negotiate for you, and estimates are informational — not appraisals or tax advice.

04Pricing

Posted prices. Flat fees. Never a percent of your savings.

Contingency firms take 25–50% of any savings — every single year. Corriden is software: one flat fee, and we never take a percentage — whatever happens. Season Passes and one-off packets check out by card from your parcel’s page; multi-parcel lists start on the Season Pass page, where each parcel is priced by its assessed value. Packets come back within two business days.

Free check + watch

$0

free, no card

estimator, free check on your parcel's page, deadline reminders

The over-assessment estimator above, the real roll-data comparison on your parcel's page, and deadline reminders when you watch the parcel.

Find your parcel

One packet

From $299

per parcel, one-off

flat fee set by the parcel's assessed value — the exact figure shows before you pay; one re-run within 30 days if the county revises its roll

The full evidence packet for one property, one season: comp grid, median study, §41.43(b)(3) argument, county filing guide. Each packet stands alone at the hearing.

Find your parcel to order

free check on your parcel's page first · card checkout · packet within two business days

Most popular

Season Pass

From $299

per parcel, per year

$299 under $2M · $749 to $5M · $1,499 to $15M · $2,999 to $40M · $4,999 above

This season's evidence packet, then the full §41.43(b)(3) analysis re-runs every time the county updates the roll, with deadline reminders each protest season. Renews yearly; cancel anytime. One pass manages your whole list.

Start a pass — one parcel or a list

card checkout · flat fee by assessed value · cancel from your account

For members

Monitor

$49

per parcel, per year · for members

includes a $50 credit toward any packet

Keep a parcel watched after your Season Pass season: deadline reminders, roll-update alerts starting with the 2027 roll, and a $50 packet credit when you want the full evidence file again.

Members: switch by email

opens email to support@corriden.com

Volume: a contingency firm that saved a portfolio $50K at its 40% fee takes $20K — every year. Corriden is a flat fee per parcel, set by assessed value ($299 to $4,999), whatever happens.

Digital analyses — all sales final, except: if your delivered packet’s informational estimate shows no indicated tax savings, you can request a refund within 30 days (see Terms).

swipe for paid tiers →

Feature comparison across Corriden plans
What you getOne packetSeason PassMonitor
Over-assessment estimator + free parcel check
Deadline reminders
Full evidence packet (per parcel)$50 credit
County filing guide + formsNot included
Re-runs when the county updates the rollNot includedalerts
Renews yearly, cancel anytimeNot included

Pricing questions

How do I buy right now?

By card, from your parcel's page. Find your parcel with the free lookup — its page shows the free comparison against the submarket median before you pay. Pick Season Pass or a one-off packet at checkout (Season Pass is preselected); packets come back within two business days. Several parcels? Build your list on the Season Pass page — any mix of the three counties — and each parcel is priced by its assessed value, with the exact total shown before you pay.

Season Pass or a one-off packet?

Both include this season's full evidence packet for the parcel. The Season Pass adds deadline reminders and re-runs of the packet when the county updates its roll, and renews each year so next season's packet is already in motion — cancel anytime from your account. The one-off packet is exactly that: one parcel, one season, done.

I own several parcels — how is the price set?

One Season Pass covers your whole list — any mix of Tarrant, Dallas, and Harris parcels — and each parcel's flat annual fee is set by its assessed value on the roll: $299 under $2M, $749 from $2M–$5M, $1,499 from $5M–$15M, $2,999 from $15M–$40M, and $4,999 at $40M and up. Every parcel's packet stands alone at its hearing. Build your list on the Season Pass page — search by address or paste account numbers — and the exact total shows before you pay. Always a flat fee, never a percentage of anything.

What is Monitor?

The keep-watching tier for current members: after a Season Pass season, Monitor keeps the parcel under watch for $49/yr — deadline reminders, roll-update alerts starting with the 2027 roll, and a $50 credit toward any evidence packet, redeemed with a one-time code in the promo-code field at packet checkout.

What's the work on my side?

Three steps, all in the packet's county filing guide. Filing: fill out the district's online-portal protest form and upload the packet. Informal review: the district often responds on the math alone. Hearing, if it goes that far: a scheduled session where you present the packet's comparison — the packet is the script. Prefer not to attend? Hand the packet to any agent you hire — Corriden itself never files, represents, or appears for you.

What's in the packet?

A hearing-ready evidence file for your parcel: the comparable grid with every adjustment printed, the median study, the written §41.43(b)(3) argument, the requested value, and a step-by-step filing guide with your county's forms. Every number traces to the public appraisal roll, and the packet ID on the cover lets anyone re-run it.

Do you file it for me?

No — by design. Corriden is software, not representation: you (or your own licensed agent) file. That keeps your costs flat and keeps us on the right side of Texas consultant-licensing law.

What if I'm not over-assessed?

You'll likely know before you spend anything: the estimator gives you a first read free, and your parcel's page from the free lookup shows the real comparison — real roll data, real submarket median — before any purchase. The packet is the hearing-ready evidence version of that comparison. And if the full math comes back at or below the median, your packet says exactly that, plainly.

The price is the price — no setup fees, no percent-of-savings, no demo call. Prices exclude tax.

05Straight answers

What owners ask before they buy.

Can I really protest without a consultant?

Yes — Texas lets every owner file their own protest.

Texas law gives property owners the right to file and argue their own protest, and thousands do it every season. The packet is the evidence: the comp grid, the median study, the written argument, and a filing guide for your county. File by May 15 — or 30 days after your appraisal notice arrives, whichever is later.

Do I have to go to court?

No — a protest is an administrative process, not a court case.

You file with the appraisal district, not a court: there's no filing fee and no lawyer is required. Most protests are resolved at the informal stage, where a district appraiser reviews the evidence one-on-one. If it goes further, the Appraisal Review Board hearing is a short meeting — typically 15–30 minutes — before a citizen panel at the district's office. Further appeals beyond the ARB exist (binding arbitration or district court, §§41A/42), but those are separate, optional processes most protests never need. The packet's filing guide walks each step for your county.

What exactly is an unequal-appraisal protest?

The argument that you're assessed above the median of comparable properties.

Tax Code §41.43(b)(3) says a protest must be resolved in the owner's favor unless the district shows your value is at or below the median of a reasonable number of comparable properties, appropriately adjusted. It compares assessed values, not sale prices, so the median math is the whole argument.

Where does your data come from?

The public appraisal roll — the county's own numbers.

Texas appraisal districts publish their full rolls in bulk, and that's what we compute from: assessed values, building sizes, class codes, submarkets, tax rates. We never touch private data, never bypass a login, and the packet names the tax year so anyone can check the inputs.

Is this an appraisal?

No.

It's an informational estimate computed from public data — we're not appraisers, and the packet says so plainly. That's fine: equity protests under §41.43(b)(3) don't require an appraisal — the statute's test is the median of comparables, computed from the county's own roll.

What does Corriden NOT do?

We never act for you — and we never promise an outcome.

We never file, represent, negotiate, or appear before an appraisal district or review board on your behalf; you (or your own licensed agent) do that. We never guarantee a reduction or refund. And we never take a percent of your savings — the fee is flat, posted on this page.

Can protesting raise my value?

In principle yes — in practice you stay in control.

Texas law lets an Appraisal Review Board (ARB) set a value higher, but that outcome is uncommon — and you can withdraw a protest before your hearing. The estimator and the packet exist precisely so you only file when the median math is on your side.

What if my packet shows no savings?

You get a refund option — triggered by our analysis, not by any hearing.

Our products are digital analyses, so sales are final by default — but honesty comes first. Your parcel's page shows the free median comparison before you spend anything. If the full packet's informational estimate still comes back with no indicated tax savings (assessment at or within 2% of the comparable median), your delivery email includes a link to request a refund within 30 days. One-off packets refund in full; a Season Pass refunds that parcel's fee less the $49 Monitor rate with the pass staying active, and single-parcel passes can instead take a full refund that ends the pass. That option follows our analysis output only — it's never tied to how any protest turns out.

It's past May 15 — is a packet still useful?

The standard window has typically closed — but limited late paths exist, and the packet also preps you for next season.

After May 15 (or 30 days after your notice), the standard protest window for the current tax year has typically closed. The Tax Code provides limited late paths — a late protest for good cause under §41.44(b), and certain corrections under §25.25 — whether one applies depends on your situation, so check with your appraisal district or your own advisor. Many owners instead buy a packet to prepare for the next notice season: the analysis is computed from the then-current appraisal roll at purchase, so it's built for the season you'll actually file in.

Which counties do you cover?

Launching with Tarrant, Harris, and Dallas.

That's the heart of the Texas May-15 cluster — one deadline, one statute, and appraisal rolls published in bulk. More counties come online each season; if yours isn't listed yet, email support@corriden.com and we'll tell you when it lands.

Get ready for 2027.

Nothing about the 2027 roll is settled yet. What you can do now is see where your parcel sits on the current one, watch it for free, and know what the packet costs before the notices land — rather than during the few weeks when everyone is deciding at once.

One flat fee. We never take a cut, whatever happens.

Built by Evan, a credentialed actuary — who builds this, and what Corriden will never do.

Look up your parcel — free