Middlesex County and Cambridge City property record for 138 Mount Auburn St, Cambridge, MA 02138
| Property Type | Office Building |
|---|---|
| Details | 4,799 sqft · built 1865 |
| Lot Size | 0.113 acres (4,911 sqft) |
| Owner | Company Name on Record |
| Last Sale | $9,725,000 (Aug 2015) |
| Tax Bill | $30,095 (2025) |
| Flood Zone | Zone X (minimal risk) |
| APN | 166-33 |
| Primary APN | 166-33 |
|---|---|
| Alternative APN |
|
| Stories | 3 Stories |
|---|---|
| Building Area | 4,799 sqft Total Area |
| Gross Area | 6,678 sqft |
| 1st Floor Area | 1,879 sqft |
| Basement Area | 1,879 sqft |
| Unfinished Basement | 1,879 sqft |
| Year Built | Built 1865 |
|---|---|
| Effective Year Built | Effective 1998 |
| Exterior Material | Wood Siding |
| Construction Type | Frame |
| Roof Type | Flat |
| Roof Material | Asphalt |
| Lot Area | 4,911 sqft (0.113 acres) |
| Cooling System | HVAC |
|---|---|
| Heating System | Forced Air with A/C |
| Heating Fuel | Gas |
| Street Address | 138 MOUNT AUBURN ST |
|---|---|
| City | CAMBRIDGE |
| State | MA |
| Zip | 02138-5749 |
| Property Category | Commercial |
| Property Type | Commercial > Office > Office Building |
| Local Zoning Code | O-3 |
| Legal Lot Number | 33 |
| Jurisdiction | CAMBRIDGE MA |
| Township / Civil Division | CAMBRIDGE |
| Census Block Group | 1 |
| Census Block | 1012 |
| Census Tract | 354100 |
Source: Middlesex County and Cambridge City records, as of April 14, 2026
Owner names and exact recorded amounts shown locked on this page are available instantly with a free trial.
| Owner of Record | Company Name on Record |
|---|---|
| Mailing Address | 138 MOUNT AUBURN ST, CAMBRIDGE, MA 02138-5749 |
| Owner Type | Company |
| Vesting | Company |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Aug 10, 2015 · Amount on Record |
| Deed Sale | Aug 10, 2015 · Amount on Record |
| Prior Sale | May 22, 1997 · Amount on Record |
| Deed Document Number | 2015132682 |
| Record Updated | Jun 8, 2026 |
Source: Middlesex County and Cambridge City assessment roll, as of April 14, 2026
| Type | Name |
|---|---|
| State | Massachusetts |
| County | Middlesex County |
| Municipality | Cambridge City |
| Unified School District | Cambridge School District (PK - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2025 | $30,095.00 (+0.91%) | $2,612,400 (-8.37%) Land $1,871,000 Building $741,400 |
| 2024 | $29,823.00 (-2.19%) | $2,851,100 (-2.94%) Land $2,420,600 Building $430,500 |
| 2023 | $30,491.00 | $2,937,500 Land $2,420,600 Building $516,900 |
Assessed value and assessed market value are set for property tax purposes, not market price estimates; both are a fraction of this property's market value.
Source: FEMA National Flood Hazard Layer, effective September 10, 2026 · OpenFEMA NFIP redacted claims and policies, as of September 2026
| FEMA Flood Zone | Zone X minimal risk |
|---|---|
| Flood Insurance Requirement | Not required lenders may require it |
| Community Rating System | Class 9 (5% premium discount) |
| Nearby Flood Policies | 3 in force |
Values are read at the parcel center point; flood claims are located to the census block group, not this parcel; lenders make the official flood determination.
Source: USDA Forest Service Wildfire Risk to Communities (2nd edition), as of 2024
| Wildfire Risk | Not rated no burnable land within ember reach |
|---|
Values cover an area roughly 900 ft across, not the parcel itself; insurers use their own ratings.
Source: EPA Safe Drinking Water Information System, as of September 2026
| Water System | CAMBRIDGE WATER DEPARTMENT serves 118,214 people · EPA ID MA3049000 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Jun 2023 |
| Lead | 8 ppb (2021–2023) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | None last 3 years |
Results are for the whole water system, not water tested at this address; lead at the tap also depends on the building's own pipes.
Source: FCC Broadband Data Collection, based on 552 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 2,000 |
| T-Mobile Fixed Wireless | 100 / 20 |
| AT&T Fixed Wireless | 100 / 20 |
May also be available: Starry, Verizon.
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