1801 MAIN ST
Office · Houston · 77002
At a glance
1801 MAIN ST in Houston, TX is listed on the Houston / Harris County property roll as “Office”, HCAD account 0021040000005. The roll records 220,792 sq ft of building area, a 1956 build year and an assessed value of $25,915,689. 16 active business locations at this address appear in public records.
Derived from suite and floor strings in the occupancy records
Which floors show activity
- 138 on record
- 123 on record
- 11no record
- 10no record
- 92 on record
- 8no record
- 7no record
- 6no record
- 5no record
- 4no record
- 3no record
- 2no record
- 1no record
Floors are read from suite numbers on Houston / Harris County business records (suite 4900 → floor 49). A floor with no record is not necessarily vacant — it may be mechanical, occupied by the owner, or let to a business whose receipt carries no suite. Receipts also lag reality by months. This shows where the public record places businesses, not a rent roll or an availability report. A stretch of quiet floors is not contiguous space for rent — it is contiguous silence in the record, which is the closest thing the public record has to that question and worth exactly what it costs to check.
Public record — 16 matched business locations
Tenants & business locations
| Company | Suite / floor | Since | Source | Match |
|---|---|---|---|---|
| CULTURE PLUS, INC. | STE 1260 | Sep 2025 | Texas sales-tax permit | address · medium |
| SOFTWAY SOLUTIONS INC | STE 1260 | Aug 2025 | Texas sales-tax permit | address · medium |
| OAS GLOBAL LLC | STE 1300 | Aug 2025 | Texas sales-tax permit | address · medium |
| AMMPER POWER LLC | STE 1220 | Jul 2025 | Texas sales-tax permit | address · medium |
| FGC HOLDCO LLC | STE 1300 | Dec 2024 | Texas sales-tax permit | address · medium |
| AMEGY ON MAIN - 345 | — | Dec 2024 | Texas sales-tax permit | address · medium |
| INCENTIFIND, INC. | STE 1300 | May 2024 | Texas sales-tax permit | address · medium |
| A & P DISTRIBUTION CENTER USA INC | STE 1300 | May 2024 | Texas sales-tax permit | address · medium |
| REVS EV FUND I, LLC | STE 940 | Apr 2024 | Texas sales-tax permit | address · medium |
| DIPOLE DIGITAL, INC. | STE 1300 | Feb 2024 | Texas sales-tax permit | address · medium |
| SMITHGROUP, INCvia SMITHGROUP, INC. | STE 1340 | Jan 2024 | Texas sales-tax permit | address · medium |
| FEBUS INC. | FL 13 | Nov 2023 | Texas sales-tax permit | address · medium |
| WELLSITE NAVIGATOR, LLC | STE 1300 | Aug 2023 | Texas sales-tax permit | address · medium |
| REVS CHARGING, LLC | STE 940 | Apr 2023 | Texas sales-tax permit | address · medium |
| AMERICAN FOOD & VENDING SERVICE OF MISSOURI, INC. | — | Nov 2020 | Texas sales-tax permit | address · medium |
| Hdr Engineering, Inc.via HDR ENGINEERING INC | — | Nov 2007 | Texas sales-tax permit | address · medium |
Houston / Harris County assessment roll
Parcel record
| Field | Value |
|---|---|
| HCAD account | 0021040000005 |
| Site address | 1801 MAIN ST |
| Land use (DOR) | F1 — Office |
| Building area (actual) | 220,792 sq ft |
| Floors / units / buildings | — / — / 1 |
| Lot size | — |
| Year built | 1956 |
| Zoning (primary) | — |
| Land value | $7,101,788 |
| Building value | — |
| Total assessed value | $25,915,689 |
Recorded owner (assessment roll)
No owning organisation shown. Where the county roll names a private individual, the name and mailing address are not published here.
Location
- Address
- 1801 MAIN ST
- City
- Houston
- ZIP
- 77002
Within ~650 m
Nearby office buildings
No other office parcels within ~650 m.
How does 1801 MAIN ST compare with other Houston office buildings?
At 220,792 sq ft, 1801 MAIN ST is about 8 times the size of the average office building on the Houston / Harris County roll, which comes to 27,364 sq ft across 11,116 buildings.
Its assessed value works out to $117 per square foot of building area, against $161 across all office floor area on the roll.
What does “Office” mean for this parcel?
The Houston / Harris County roll classifies HCAD account 0021040000005 as “Office” (use code F1). BuildingCensus includes a parcel in its office census when the roll gives it an office-class use, so the label is the county's, not an inference.
Frequently asked questions
Who owns 1801 MAIN ST?
No owning organisation is shown for this parcel. Where the county roll names a private individual as owner, BuildingCensus does not publish the name or mailing address.
What companies have offices at 1801 MAIN ST?
16 active business locations at this building appear in Houston / Harris County public records, including CULTURE PLUS, INC., SOFTWAY SOLUTIONS INC, OAS GLOBAL LLC, AMMPER POWER LLC, FGC HOLDCO LLC. Public records under-count tenants that don't hold a local receipt or register the address.
How big is 1801 MAIN ST?
The Houston / Harris County roll records 220,792 sq ft of building area, a build year of 1956.
What is the assessed value of 1801 MAIN ST?
$25,915,689 on the Houston / Harris County roll. Assessed values are taxable-roll figures, not market prices.
What is the HCAD account for 1801 MAIN ST?
HCAD account 0021040000005, site address 1801 MAIN ST, Houston. It is the key to look the parcel up in the Harris Central Appraisal District bulk CAMA files (Houston / Harris County).
More around 1801 MAIN ST
Everything here comes from public records, and public records go stale. If you know better, say so.
Data provenance — public records only
- Houston / Harris County — Harris Central Appraisal District bulk CAMA files (owner names, mailing addresses, appraised values, and per-building net rentable area — data most counties never publish). Texas is a non-disclosure state, so no sale prices exist in any public record, and Houston issues no universal business licence, so no tenant layer is possible. A partial tenant layer comes from the Texas Comptroller's active sales-tax permit roll: suite-level business locations, but only firms with taxable sales — professional services without them do not appear.
Every fact on this page is drawn from the government records above — no listing sites, no scraped platforms, no third-party images. Facts from public records are uncopyrightable; each tenancy row carries its source and match confidence. Records can lag reality — a business-tax receipt or registration at an address is evidence of occupancy, not a lease confirmation.
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Dataset updated . Source: Houston / Harris County assessment roll, HCAD account 0021040000005.
About this data
Source: Harris Central Appraisal District bulk CAMA files (Houston / Harris County), as published September 20, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “1801 MAIN ST, Houston, TX (HCAD account 0021040000005)”, https://buildingcensus.com/offices/houston/office-building-11af9417 (data as of September 20, 2026).