Middlesex County and Waltham City property record for 400 5th Ave, Waltham, MA 02451
| Property Type | Office Building |
|---|---|
| Details | 3 bd · 7 ba · 120,318 sqft · built 1975 |
| Lot Size | 3.99 acres (174,000 sqft) |
| Owner | Company Name on Record |
| Last Sale | $19,700,000 (Jul 2014) |
| Tax Bill | $555,080 (2026) |
| Flood Zone | Zone X (minimal risk) |
| APN | 137006 |
| Primary APN | 137006 |
|---|---|
| Alternative APN |
|
| Bedrooms | 3 Beds |
|---|---|
| Full Baths | 7 Baths |
| Half Baths | 12 Half Baths |
| Total Rooms | 5 Rooms |
| Units | 2 Units |
| Stories | 6 Stories |
| Building Area | 120,318 sqft Total Area |
| Gross Area | 120,600 sqft |
| Basement Area | 872 sqft |
| Unfinished Basement | 872 sqft |
| Year Built | Built 1975 |
|---|---|
| Effective Year Built | Effective 1975 |
| Architectural Style | Ranch |
| Exterior Material | Brick |
| Construction Type | Steel Frame |
| Foundation Type | Slab (Mat/Raft) |
| Roof Type | Flat |
| Roof Material | Other |
| Lot Area | 174,000 sqft (3.99 acres) |
| Garage Type | Detached |
| Cooling System | HVAC |
|---|---|
| Heating Fuel | Electric |
| Account Number | 137006 |
|---|---|
| Street Address | 400 5TH AVE |
| City | WALTHAM |
| State | MA |
| Zip | 02451-8706 |
| Property Category | Commercial |
| Property Type | Commercial > Office > Office Building |
| Legal Block | 1 |
| Legal Lot Number | 25 |
| Jurisdiction | WALTHAM MA |
| Township / Civil Division | WALTHAM |
| Census Block Group | 3 |
| Census Block | 3013 |
| Census Tract | 368200 |
Source: Middlesex County and Waltham City records, as of October 20, 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 | 465 WAVERLEY OAKS RD, 500, WALTHAM, MA 02452-8488 |
| Owner Type | Company |
| Vesting | Company |
| Deed Names | Name on Deed |
|---|---|
| Last Sale | Jul 9, 2014 · Amount on Record |
| Deed Sale | Jul 9, 2014 · Amount on Record |
| Prior Sale | Sep 16, 2010 · Amount on Record |
| Deed Document Number | 201496662 |
| Deed Book / Page | 63887 / 549 |
| Transfer Doc | 63887-549 |
| Record Updated | Oct 29, 2026 |
Source: Middlesex County and Waltham City assessment roll, as of April 14, 2026
| Type | Name |
|---|---|
| State | Massachusetts |
| County | Middlesex County |
| Municipality | Waltham City |
| Unified School District | Waltham School District (PK - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $555,080.00 (+4.44%) | $25,026,144 (-0.93%) Land $4,364,100 Building $20,662,044 |
| 2025 | $531,470.00 (+6.69%) | $25,260,000 (+5.02%) Land $5,288,700 Building $19,971,300 |
| 2024 | $498,131.00 (-10.68%) | $24,052,700 (-5.34%) Land $4,364,100 Building $19,688,600 |
| 2023 | $557,723.00 | $25,408,800 Land $4,364,100 Building $21,044,700 |
Assessed value is set for property tax purposes and is not a market price estimate.
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 |
| Nearby Flood Policies | 2 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 | Low lower than 80% of the US · above 57% of Massachusetts |
|---|---|
| Wildfire Likelihood | 0.01% annual chance |
| Exposure | None beyond 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 | WALTHAM WATER DEPARTMENT serves 65,218 people · EPA ID MA3308000 |
|---|---|
| Water Source | Purchased surface water from MWRA |
| Last State Inspection | Jun 2024 |
| Lead | 2 ppb (2025) action level 15 ppb |
| Water Quality | None last 10 years |
|---|---|
| Treatment and Procedure | None last 10 years |
| Monitoring and Reporting | 1 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 44 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Xfinity Cable | 2,000 / 2,000 |
| Astound Broadband Cable · Fiber in parts of the area | 1,500 / 50 |
May also be available: T-Mobile, Verizon.
Search by:
By searching, you agree to: Terms • Privacy • Disclosures