400 MONTGOMERY ST
Commercial Office · San Francisco
At a glance
400 MONTGOMERY ST in San Francisco, CA is listed on the San Francisco property roll as “Commercial Office”, block/lot 0239009. The roll records 99,510 sq ft of building area, 11 floors, a 1901 build year and an assessed value of $81,466,335. 17 active business locations at this address appear in public records.
Derived from suite and floor strings in the occupancy records
Which floors show activity
- 111 on record
- 101 on record
- 92 on record
- 83 on record
- 71 on record
- 61 on record
- 51 on record
- 41 on record
- 32 on record
- 21 on record
- 1no record
Floors are read from suite numbers on San Francisco 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.
The building's own benchmarking filing
Energy performance
From the building's own filing under its city's benchmarking ordinance. An ENERGY STAR score of 75 or above means the building outperforms three quarters of comparable buildings nationally. It is a self-reported figure, verified by the city only to the extent the ordinance requires.
Public record — 17 matched business locations
Tenants & business locations
| Company | Suite / floor | Since | Source | Match |
|---|---|---|---|---|
| Mcs Construction Services | STE 500 | Dec 2025 | SF registered business | address · medium |
| Mainstay Labs Inc. | STE 950 | Aug 2024 | SF registered business | address · medium |
| Tasi Bank, Division Of Bank Of Guam | STE 1100 | Jun 2022 | SF registered business | address · medium |
| Allied Universal Security Services | # 7 | Apr 2022 | SF registered business | address · medium |
| Remix Technologies LLC | FL 4 | Mar 2021 | SF registered business | address · medium |
| Lightsource Renewable Energy Us LLC | FL 8 | Jan 2021 | SF registered business | address · medium |
| Hubspot, Inc. | STE 1000 | Jan 2020 | SF registered business | address · medium |
| Waggener Edstrom Worldwide, Inc | STE 300 | Mar 2019 | SF registered business | address · medium |
| Codeword LLC | STE 300 | Jan 2019 | SF registered business | address · medium |
| Lightsource Renewable Energy Operations, LLC | # 8 | Apr 2017 | SF registered business | address · medium |
| Harvest Properties, Inc. | — | Oct 2016 | SF registered business | address · medium |
| Halal Cart LLC | — | Nov 2014 | SF registered business | address · medium |
| Cbre Inc | STE 1203 | Dec 2013 | SF registered business | address · medium |
| Plivo Inc | STE 650 | Nov 2012 | SF registered business | address · medium |
| John J Jordan | STE 200 | Jan 2005 | SF registered business | address · medium |
| Susan Petro Attorney At Law | STE 810 | Apr 2000 | SF registered business | address · medium |
| Hom Albert Cpa | STE 910 | Jan 1982 | SF registered business | address · medium |
San Francisco assessment roll
Parcel record
| Field | Value |
|---|---|
| block/lot | 0239009 |
| Site address | 400 MONTGOMERY ST |
| Land use (DOR) | COMO — Commercial Office |
| Building area (actual) | 99,510 sq ft |
| Floors / units / buildings | 11 / 1 / — |
| Lot size | 10,062 sq ft |
| Year built | 1901 |
| Zoning (primary) | — |
| Land value | $48,879,801 |
| Building value | — |
| Total assessed value | $81,466,335 |
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
- 400 MONTGOMERY ST
- City
- San Francisco
Within ~650 m
Nearby office buildings
No other office parcels within ~650 m.
How does 400 MONTGOMERY ST compare with other San Francisco office buildings?
At 99,510 sq ft, 400 MONTGOMERY ST is about 32% larger than the average office building on the San Francisco roll, which comes to 75,252 sq ft across 1,254 buildings.
With 11 floors it is one of 199 office buildings of ten or more floors in the metro.
Its assessed value works out to $819 per square foot of building area, against $576 across all office floor area on the roll.
Does the owner of 400 MONTGOMERY ST hold other San Francisco office property?
San Francisco's published roll does not include owner names, so no owner is shown for any parcel in this metro.
What has happened at 400 MONTGOMERY ST recently?
The building files energy-benchmarking disclosures — 1 report year are matched to this parcel.
What does “Commercial Office” mean for this parcel?
The San Francisco roll classifies block/lot 0239009 as “Commercial Office” (use code COMO). 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 400 MONTGOMERY ST?
San Francisco's published roll does not include owner names, so no owner is shown.
What companies have offices at 400 MONTGOMERY ST?
17 active business locations at this building appear in San Francisco public records, including Mcs Construction Services, Mainstay Labs Inc., Tasi Bank, Division Of Bank Of Guam, Allied Universal Security Services, Remix Technologies LLC. Public records under-count tenants that don't hold a local receipt or register the address.
How big is 400 MONTGOMERY ST?
The San Francisco roll records 99,510 sq ft of building area, 11 floors, a build year of 1901. It sits on a 10,062 sq ft lot.
What is the assessed value of 400 MONTGOMERY ST?
$81,466,335 on the San Francisco roll. Assessed values are taxable-roll figures, not market prices.
What is the block/lot for 400 MONTGOMERY ST?
Block/lot 0239009, site address 400 MONTGOMERY ST, San Francisco. It is the key to look the parcel up in the Assessor secured roll (San Francisco).
More around 400 MONTGOMERY ST
Everything here comes from public records, and public records go stale. If you know better, say so.
Data provenance — public records only
- San Francisco — Assessor secured roll (use classes, stories, areas, assessed values — California law excludes owner names from open data, and no bulk sale-price source exists), the universal registered-business roll with suite-level addresses, and current energy benchmarking joined by parcel.
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: San Francisco assessment roll, block/lot 0239009.
About this data
Source: Assessor secured roll (San Francisco), as published September 20, 2026. See the methodology for how records are matched, cleaned and scored.
Cite as: BuildingCensus, “400 MONTGOMERY ST, San Francisco, CA (block/lot 0239009)”, https://buildingcensus.com/offices/sf/office-building-e3155d85 (data as of September 20, 2026).