510 S CONGRESS AVE TX 78745
| Owner | 500 SOUTH CONGRESS OWNER LLC |
|---|---|
| Parcel ID | 0202000124 |
| Short ID | 188632 |
| Type | Real |
| Use Code | 51 Office Large (>35,000 SF) |
| Valuation | Income |
| Improvement SF | 33,407 SF |
| Land SF | 43,780 SF |
| Acres | 1.005 |
| Year Built | 1971 |
| Legal | ABS 8 SUR 20 DECKER I ACR 1.0051 |
| Neighborhood | 51SCN |
| Land | $10,069,400 |
|---|---|
| Special Use Land Market | Not Available |
| Total Land | $10,069,400 |
| Improvement | — |
|---|---|
| Total Improvement | — |
| Market | $9,870,000 |
|---|---|
| Special Use Exclusion (−) | Not Available |
| Appraised | $9,870,000 |
| Value Limitation Adjustment (−) | — |
| Net Appraised (assessed) | $9,870,000 |
| Taxable Value | $9,870,000 |
|---|
Appreciation: Market value has risen +50.3% from $6,567,001 (2021) to $9,870,000 (2025), a CAGR of 10.7% over 4 years. This is strong appreciation — well above typical inflation. Most of this growth came in a single year (2023→2024), not a steady climb — worth checking what drove that reappraisal rather than assuming a smooth trend. Over the same span, the median Commercial parcel countywide rose +24.1%, so this parcel has outpaced the broader commercial market over the same period.
Tax Burden: The combined rate across 5 taxing entities is 2.0465% in 2025 (+0.0647% vs 2024 — rates increased ). At the current taxable value, estimated annual taxes are $201,988. Austin ISD is the largest single contributor, at 45.2% of the total 2025 levy.
Asset Class: Commercial. No homestead exemptions apply — full market value is taxable. This is valued using the income approach, so changes in rent roll or occupancy move the appraisal more directly than they would for a cost-approach property.
Value Composition: Land carries 102% of market value ($10,069,400 land vs $0 improvements), about $230/SF of land. With value concentrated in the land under a ~55-year-old structure, this reads as a land-dominated asset — the classic higher-and-best-use / redevelopment signal. Underwrite the dirt, not the building.
Submarket Position: At $9,870,000, this parcel sits in the top quartile (≥75th percentile) of Commercial property in Travis County — county median $1,417,484 (P25 $649,268 / P75 $3,347,260, n=13,608). Commercial here is the broad TCAD category — every commercial 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 +10.7% Base-scenario CAGR (Based on 2021–2025 certified trend, projected forward from 2025), the model projects market value near $16,424,976 by 2030, with an estimated annual tax burden around $299,435. 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.
10 components · show ▾hide ▴
| Code | Description | SF | In Gross |
|---|---|---|---|
| 487 | PARKING UNDER | 36,499 SF | ✓ |
| 2ND | 2nd Floor | 10,304 SF | ✓ |
| 3RD | 3rd Floor | 10,304 SF | ✓ |
| 4TH | 4th Floor | 10,304 SF | ✓ |
| 1ST | 1st Floor | 10,124 SF | ✓ |
| 551 | PAVED AREA | 3,323 SF | ✗ |
| 450 | SPORT COURT | 3,240 SF | ✗ |
| SO | Sketch Only | 3,053 SF | ✗ |
| FBSMT | Finished Basement | 2,675 SF | ✓ |
| 501 | CANOPY | 180 SF | ✗ |
No large value jumps, delinquencies, or data anomalies found for this parcel.
| Entity | 2021 Rate | 2022 Rate | 2023 Rate | 2024 Rate | 2025 Rate | YoY (2024→25) | Amt Due | Amt Paid | Balance |
|---|---|---|---|---|---|---|---|---|---|
| IAU Austin ISD | 1.0617% | 0.9966% | 0.8595% | 0.9505% | 0.9252% | -0.0253% | $89,042.16 | $89,042.16 | Paid |
| CAT City of Austin | 0.5410% | 0.4627% | 0.4458% | 0.4776% | 0.5240% | +0.0464% | $50,431.91 | $50,431.91 | Paid |
| TCO Travis County | 0.3574% | 0.3182% | 0.3047% | 0.3444% | 0.3758% | +0.0314% | $36,171.69 | $36,171.69 | Paid |
| THD Travis Central Health | 0.1118% | 0.0987% | 0.1007% | 0.1080% | 0.1180% | +0.0101% | $11,358.65 | $11,358.65 | Paid |
| ACT Austin Community College | 0.1048% | 0.0987% | 0.0986% | 0.1013% | 0.1034% | +0.0021% | $9,951.32 | $9,951.32 | Paid |
| Combined Rate | 2.1767% | 1.9749% | 1.8092% | 1.9818% | 2.0465% | +0.0647% | $196,955.73 | $196,955.73 | Paid |
| 2026 Certified Certified | 2025 Certified Certified | Change 2025→2026 | |
|---|---|---|---|
| Market Value | $10,069,567 | $9,870,000 | +2.0% |
| Assessed Value | $10,069,567 | $9,870,000 | +2.0% |
| Land Value | $10,069,400 | $10,069,400 | +0.0% |
| Improvement Value | $167 | — | — |
| Taxable Value | $10,069,567 | $9,870,000 | +2.0% |
| Total Tax 2026 = estimate |
~$206,072
Estimated
|
~$196,956
Partial
|
ⓘ |
| 2026 Preliminary Preliminary | 2026 Certified Certified | Change | |
|---|---|---|---|
| Market Value | $10,069,567 | $10,069,567 | +0 (+0.0%) |
| Taxable Value | $10,069,567 | $10,069,567 | +0 (+0.0%) |
| Year | Market Value | Land Value | Imprv Value | Value Limitation Adj (−) | Net Appraised (Assessed) | Taxable Value | Total Tax | Source |
|---|---|---|---|---|---|---|---|---|
| 2026 | $10,069,567 | $10,069,400 | $167 | — | $10,069,567 | $10,069,567 | Not yet — post-cert | Certified — no billing yet |
| 2025 | $9,870,000 | $10,069,400 | — | — | $9,870,000 | $9,870,000 | ~$196,956 | Partial |
| 2024 | $10,448,203 | — | — | −$378,803 | $10,069,400 | $— | $184,058 | Verified |
| 2023 | $7,954,825 | — | — | — | $10,069,400 ! | $— | $189,525 | Verified |
| 2022 | $7,252,346 | — | — | −$685,346 | $6,567,000 | $— | $157,102 | Verified |
| 2021 | $6,567,001 | — | — | −$1 | $6,567,000 | $— | $157,860 | Verified |
| Year | MktVal YoY | Assessed YoY | Asmt Ratio | Eff. Tax Rate | Coverage |
|---|---|---|---|---|---|
| 2026 | +2.0% | +2.0% | ~100% | Not available | Partial |
| 2025 | -6.2% | -6.2% | ~100% | Not available | Partial |
| 2024 | -3.9% | -3.9% | ~100% | 1.7500% | Verified |
| 2023 | +37.6% | +37.6% | ~100% | 1.7300% | Verified |
| 2022 | +9.7% | +9.7% | ~100% | 1.9700% | Verified |
| 2021 | base year | — | ~100% | 2.4000% | Verified |
| Cumulative market value growth (earliest valid year → 2025): +36.1% | |||||
| 12 Month | Hist. Avg | Forecast Avg | Peak | When | Trough | When | |
|---|---|---|---|---|---|---|---|
| Market Value Growth | +2.0% | +9.6% | +10.3% | +31.3% | 2024 | -5.5% | 2025 |
| Assessment Ratio | 100.0% | 102.3% | — | 126.6% | 2023 | 90.6% | 2022 |
| Effective Tax Rate (2025) | 2.0000% | 2.0000% | — | 2.0000% | 2025 | 2.0000% | 2025 |
|
Tax Amount
⚑ 2025 total is a derived or partial figure, not independently confirmed |
$196,956 | $177,100 | ~$257,531 | $196,956 | 2025 | $157,102 | 2022 |
| Year | ~Mkt Value | ~Assessed | ~Rate | ~Ann. Tax | Value Δ |
|---|---|---|---|---|---|
| 2026 | ~$10,928,352 | ~$10,857,000 | ~2.0139% | ~$218,653 | +10.7% |
| 2027 | ~$12,100,190 | ~$11,942,700 | ~1.9814% | ~$236,631 | +22.6% |
| 2028 | ~$13,397,683 | ~$13,136,970 | ~1.9488% | ~$256,018 | +35.7% |
| 2029 | ~$14,834,306 | ~$14,450,667 | ~1.9163% | ~$276,917 | +50.3% |
| 2030 | ~$16,424,976 | ~$15,895,734 | ~1.8837% | ~$299,435 | +66.4% |
| 2026 | ~$10,730,952 | ~$10,730,952 | ~2.0465% | ~$219,607 | +8.7% |
| 2027 | ~$11,667,004 | ~$11,667,004 | ~2.0465% | ~$238,763 | +18.2% |
| 2028 | ~$12,684,707 | ~$12,684,707 | ~2.0465% | ~$259,591 | +28.5% |
| 2029 | ~$13,791,183 | ~$13,791,183 | ~2.0465% | ~$282,234 | +39.7% |
| 2030 | ~$14,994,177 | ~$14,994,177 | ~2.0465% | ~$306,854 | +51.9% |
| 2026 | ~$11,125,752 | ~$10,857,000 | ~1.9977% | ~$216,886 | +12.7% |
| 2027 | ~$12,541,272 | ~$11,942,700 | ~1.9488% | ~$232,744 | +27.1% |
| 2028 | ~$14,136,888 | ~$13,136,970 | ~1.9000% | ~$249,605 | +43.2% |
| 2029 | ~$15,935,512 | ~$14,450,667 | ~1.8512% | ~$267,510 | +61.5% |
| 2030 | ~$17,962,974 | ~$15,895,734 | ~1.8024% | ~$286,500 | +82.0% |
In 2025, this property's market value of $9,870,000 places it in the top 25% for Commercial properties in Travis County (13608 comparable) — 7× the county median of $1,417,484. Commercial here is the broad TCAD category — every commercial 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 | $9,870,000 | $649,268 | $1,417,484 | $3,347,260 | ↑ Top 25% | -0.8% |
| 2024 | $10,448,203 | $661,016 | $1,438,465 | $3,471,171 | ↑ Top 25% | +0.0% |
| 2023 | $7,954,825 | $667,828 | $1,414,358 | $3,374,900 | ↑ Top 25% | +9.7% |
| 2022 | $7,252,346 | $553,066 | $1,215,730 | $2,939,150 | ↑ Top 25% | +3.3% |
| 2021 | $6,567,001 | $517,750 | $1,142,600 | $2,780,453 | ↑ Top 25% | base yr |
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.