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21404 WEBBER OAKS CV TX 78621

Travis County, TX · Residential (Single-Family) Appraisal: 2025 Certified Billing: 2025 Partial 2021–24 billing ✓
At a Glance
2025 Certified
Market Value
$539,577
2025 Verified
Taxable Value
$19,527
2025 Verified (96% below market)
Total Tax
~$698
2025 Partial
Effective Tax Rate (2025)
2.7300%
2025 Tax ÷ 2025 Market Value Partial
2026 Certified
Market Value
$502,530
-6.9% 2025 → 2026 Certified
Taxable Value
$19,698
2026 Certified (96% below market)
Est. 2026 Total Tax
~$537
2026 Estimated
Est. 2026 Effective Tax Rate
0.1069%
Est. 2026 Tax ÷ 2026 Market Value Estimated
At a Glance Tax Bill History Compares Resources
2026 Property Tax Calendar ◷ Today: September 15, 2026
Valuation Date
Jan 1
Notices Mailed
Apr 15
Protest Deadline
May 15
Roll Certified
Jul 25
Rates Adopted
Sep 1
Payment Due
Jan 31
Property Info
Owner CASTELAN ANDRES G &
Parcel ID 0201870102
Short ID 441749
Type Mobile Home
Use Code 12 Mobile Home — Double (PP)
Valuation Cost
Improvement SF 1,568 SF
Land SF 351,965 SF
Acres 8.080
Year Built 1999
Legal PERSONAL PROPERTY M/H SERIAL# 12331479A/B LABEL# PFS0631243/1244
Neighborhood
Current Values 2025 Certified
Land$518,615
Special Use Land MarketNot Available
Total Land $518,615
Improvement$1,435
Total Improvement $1,435
Market$539,577
Special Use Exclusion (−)Not Available
Appraised$539,577
Value Limitation Adjustment (−) (homestead cap)−$354,777
Net Appraised (assessed) $184,800
Exemptions (−) (DP,HS)−$165,273
Taxable Value $19,527
Build-up from 2025 TCAD certified values. Land and Improvement are shown as single totals — Parcelytics' loaders capture one aggregate value per year, not TCAD's Homesite / Non-Homesite split. Special Use Land Market and Special Use Exclusion (agricultural/productivity valuation) are not in the current dataset.
Satellite View Imagery: Esri
Satellite image not available
We couldn't locate this property on the map — this can happen for parcels whose address our geocoder can't confidently match.
Investor Insight Report

Appreciation: Market value has risen +280.8% from $141,694 (2021) to $539,577 (2025), a CAGR of 39.7% over 4 years. This is strong appreciation — well above typical inflation. Most of this growth came in a single year (2021→2022), not a steady climb — worth checking what drove that reappraisal rather than assuming a smooth trend. Over the same span, the median Residential parcel countywide rose +45.8%, so this parcel has outpaced the broader residential market over the same period.

Tax Burden: The combined rate across 6 taxing entities is 2.7276% in 2025 (-0.0044% vs 2024 — rates decreased ). At the current taxable value, estimated annual taxes are $533. Manor ISD is the largest single contributor, at 30.3% of the total 2025 levy.

Assessment Gap: Assessed value ($184,800) is $354,777 below market value, suggesting potential for an upward assessment in future years.

Asset Class: Single-family residential. Buyer should verify which exemptions carry and which reset at sale. This is valued using the cost approach, tied more to replacement cost and physical condition than to income performance.


Investment Snapshot — 2025 certified basis
Building (Main)
1,568 SF
living area
Gross Building
1,568 SF
enclosed area
Land
351,965 SF
8.080 ac
Value / Bldg SF
$344
all-in (incl. land)
Land $/SF
$1
land value only
Land Value Share
96%
Year Built
1999
~27 yrs old
Eff. Tax Rate
2.730%
total tax ÷ market value
Assessment Ratio
34.2%
below typical ~100%
Est. Annual Tax
$533
2025 taxable × rate

Value Composition: Land carries 96% of market value ($518,615 land vs $1,435 improvements), about $1/SF of land. With value concentrated in the land, this reads as a land-dominated asset — the classic higher-and-best-use / redevelopment signal. Underwrite the dirt, not the building.

Submarket Position: At $539,577, this parcel sits in the upper-middle (50th–75th percentile) of Residential property in Travis County — county median $479,535 (P25 $358,633 / P75 $737,055, n=318,609). Residential here is the broad TCAD category — every residential property countywide, any size or use — not a use-code-specific peer group. See the Peer Set and the Where This Property Stands benchmark below, which narrows to this property's actual use code, for parcel-level comparables.

Forward Outlook: Holding the +39.7% Base-scenario CAGR (Based on 2021–2025 certified trend, projected forward from 2025), the model projects market value near $2,870,324 by 2030, with an estimated annual tax burden around $6,256. Estimated Forward figures are model projections, not certified — see the 6-Year Projection section for the low/base/high bands.

No delinquent taxes on record.

Improvement Detail
Improvement Value
$1,435
Main Area
1,568 SF
Gross Building Area
1,568 SF
Year Built
1999
2 components · show ▾hide ▴
Code Description SF In Gross
1ST 1st Floor 1,568 SF
511 DECK 216 SF
This Account Includes 2 Units (2026 values — the figures above on this page are the sum of these rows)
Unit (prop_id) Owner Address Market Value Assessed Value Taxable Value
441749 CASTELAN ANDRES 21404 WEBBER OAKS CV 78621 $483,003 $181,800 $171
839509 CASTELAN ANDRES G & 21404 WEBBER OAKS CV 78621 $19,527 $19,527 $19,527
Your Tax Bill, This Year
2025 Tax Burden — Entity Split
IMA
30.3% $211
IDV
26.6% $185
E12
26.5% $185
TCO
10.5% $73
THD
3.3% $23
ACT
2.9% $20
Total: $698
Risk Indicators
Risk Indicators
!
Large Value Jump

Market value changed by 95% in 2022, flagged as unusually large. Verify against comparable sales before using this value in underwriting.

How We Got Here
Rate Environment
Historical Tax Rates by Entity (Travis County)
Entity 2021 Rate 2022 Rate 2023 Rate 2024 Rate 2025 Rate YoY (2024→25) Amt Due Amt Paid Balance
IMA Manor ISD 1.3520% 1.3520% 1.0861% 1.0814% 1.0814% +0.0000% $211.16 $211.16 Paid
IDV Del Valle ISD 1.2020% 1.1846% 1.0028% 0.9969% 0.9489% -0.0480% $185.29 $185.29 Paid
E12 Travis County ESD # 12 0.1000% 0.1000% 0.0982% 0.1000% 0.1000% +0.0000% $184.80 $184.80 Paid
TCO Travis County 0.3574% 0.3182% 0.3047% 0.3444% 0.3758% +0.0314% $73.39 $73.39 Paid
THD Travis Central Health 0.1118% 0.0987% 0.1007% 0.1080% 0.1180% +0.0101% $23.05 $23.05 Paid
ACT Austin Community College 0.1048% 0.0987% 0.0986% 0.1013% 0.1034% +0.0021% $20.19 $20.19 Paid
Combined Rate 3.2280% 3.1522% 2.6910% 2.7320% 2.7276% -0.0044% $697.88 $697.88 Paid
Value Trend
Value History 2021–2026
Current & Certified Values
2026 Certified Certified 2025 Certified Certified Change 2025→2026
Market Value $502,530 $539,577 -6.9%
Assessed Value $201,327 $184,800 +8.9%
Land Value $481,568 $518,615 -7.1%
Improvement Value $1,435 $1,435 +0.0%
Taxable Value $19,698 $19,527 +0.9%
Exemptions DP,HS DP,HS
HS Cap Loss -$301,203
Total Tax 2026 = estimate
~$537
Estimated
~$698
Partial
2026: Preliminary → Certified how this parcel's 2026 value moved since the June 9, 2026 preliminary notice
2026 Preliminary Preliminary 2026 Certified Certified Change
Market Value $502,530 $502,530 +0 (+0.0%)
Taxable Value $21,747 $19,698 -2,049 (-9.4%)
Value History (2021–2026)
Year Market Value Land Value Imprv Value Value Limitation Adj (−) Net Appraised (Assessed) Taxable Value Total Tax Source
2026 $502,530 $481,568 $1,435 −$301,203 $201,327 $19,698 Not yet — post-cert Certified — no billing yet
2025 $539,577 $518,615 $1,435 −$354,777 $184,800 $19,527 ~$698 Partial
2024 $387,511 $518,615 ! $— $150 Verified
2023 $387,511 −$20,962 $366,549 $— $134 Verified
2022 $397,440 −$30,891 $366,549 $— $292 Verified
2021 $141,694 $376,478 ! $— $280 Verified
Market Value vs. Taxable Value gap up to 96.4%
Year-over-Year Growth & Assessment Metrics
Year MktVal YoY Assessed YoY Asmt Ratio Eff. Tax Rate Coverage
2026 +0.0% +0.0% ~100% Not available Partial
2025 +0.0% +0.0% ~100% Not available Partial
2024 +0.0% +0.0% ~100% 0.0300% Verified
2023 +0.0% +0.0% ~100% 0.0300% Verified
2022 -94.8% ! -82.7% ~100% 0.0800% Verified
2021 base year 29.9% 0.2000% Verified
Cumulative market value growth (earliest valid year → 2025): -94.8%
Annual Trends Tax billing 2025 only
How This Parcel Compares
6-Year Projection Estimates Only
5-Year Tax Projection — Scenario Bands Estimates Only
Show illustrative scenario:
Year ~Mkt Value ~Assessed ~Rate ~Ann. Tax Value Δ
2026 ~$753,753 ~$203,280 ~2.6025% ~$5,290 +39.7%
2027 ~$1,052,942 ~$223,608 ~2.4774% ~$5,540 +95.1%
2028 ~$1,470,889 ~$245,969 ~2.3523% ~$5,786 +172.6%
2029 ~$2,054,733 ~$270,566 ~2.2272% ~$6,026 +280.8%
2030 ~$2,870,324 ~$297,622 ~2.1021% ~$6,256 +432.0%
Submarket Position
Where This Property Stands — Residential Benchmark

In 2025, this property's market value of $539,577 places it in the 50th–75th percentile for Residential properties in Travis County (318609 comparable) — +13% above the county median of $479,535. Residential here is the broad TCAD category — every residential property countywide, any size or use — not a use-code-specific peer group. Use the Use Code filter above to narrow to this property's actual type.

Year This Property Bottom 25% Median Top 25% Position Group YoY
2025 $539,577 $358,633 $479,535 $737,055 ↑ Above median -6.4%
2024 $387,511 $384,868 $512,735 $786,167 ↓ Below median -8.7%
2023 $387,511 $424,496 $565,716 $845,447 ↓ Bottom 25% -2.1%
2022 $397,440 $435,080 $581,770 $864,060 ↓ Bottom 25% +53.2%
2021 $141,694 $239,232 $328,865 $488,922 ↓ Bottom 25% base yr
More Resources
Property Tax & County News Travis County · live feed
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Post-Acquisition Tax Estimate Estimate · Not a prediction
Property: 1,568 SF main area · 1,568 SF gross · 8.080 ac lot
$

Estimate only. The appraisal district sets value as of Jan 1 (not at sale price). A sale is strong evidence of market value and is typically reflected in the next Jan 1 valuation. Taxing units set rates annually. Modeled from government data — not a legal or tax opinion.