Middlesex County and Burlington Town property record for 23 4th Ave, Burlington, MA 01803
| Property Type | R&D Facility, Laboratory |
|---|---|
| Details | 7.5 ba · 38,957 sqft · built 1967 |
| Lot Size | 3.1 acres (135,036 sqft) |
| Owner | 2 Company Names on File |
| Tax Bill | $115,647 (2026) |
| Deeds & Mortgages | May 2021 Refinance |
| Flood Zone | Zone X (minimal risk) |
| APN | BURL M:000039 P:000006 |
| Primary APN | BURL M:000039 P:000006 |
|---|
| Full Baths | 7.5 Baths |
|---|---|
| Half Baths | 15 Half Baths |
| Stories | 1 Story |
| Building Area | 38,957 sqft Total Area |
| Gross Area | 39,133 sqft |
| Year Built | Built 1967 |
|---|---|
| Effective Year Built | Effective 1967 |
| Exterior Material | Brick |
| Construction Type | Steel Frame |
| Roof Type | Flat |
| Roof Material | Other |
| Lot Area | 135,036 sqft (3.1 acres) |
| Cooling System | HVAC |
|---|---|
| Heating System | Forced Air with A/C |
| Heating Fuel | Gas |
| Street Address | 23 4TH AVE |
|---|---|
| City | BURLINGTON |
| State | MA |
| Zip | 01803-3326 |
| Property Category | Industrial |
| Property Type | Industrial > R&D Facility, Laboratory |
| Local Zoning Code | NPD |
| Jurisdiction | BURLINGTON MA |
| Township / Civil Division | BURLINGTON |
| Census Block Group | 2 |
| Census Block | 2010 |
| Census Tract | 332402 |
23 4th Ave, an industrial property, is owned by a company.
Source: Middlesex County and Burlington Town records, as of October 20, 2026
| Owner of Record | 2 Company Names on File |
|---|---|
| Mailing Address | 71 3RD AVE, BURLINGTON, MA 01803-4471 |
| Owner Type | Company |
| Vesting | Company |
Owner names and exact recorded amounts are on file and can be viewed instantly on this page with a free 10-day trial.
| Deed Names | 2 Names on Deed |
|---|---|
| Record Updated | Oct 29, 2026 |
| Document Type | Deed of Trust |
|---|---|
| Jurisdiction | BURLINGTON MA |
| Property Address | 23 4TH AVE, BURLINGTON, MA 01803-3326 |
| Transaction Type | Mortgage |
| Record Updated | Jun 4, 2021 |
| Name | Verified Name |
|---|
| Document Number | 77831-299 |
|---|---|
| Date | May 21, 2021 |
| Book Page | 77831/299 |
| Instrument | 115951 |
| Name | WOODMEN OF THE WORLD |
|---|
| Type | Stand-Alone Refinance |
|---|---|
| Amount | Amount on Record |
| Term | 181 Months |
| Due | Jun 1, 2036 |
The 2026 property tax bill for 23 4th Ave was $115,647, up 4.1% from the year before.
Source: Middlesex County and Burlington Town assessment roll, as of April 14, 2026
| Type | Name |
|---|---|
| State | Massachusetts |
| County | Middlesex County |
| County Subdivision | Burlington Town |
| Unified School District | Burlington School District (PK - 12) |
| Year | Tax Bill | Assessed Value |
|---|---|---|
| 2026 | $115,647.00 (+4.11%) | $4,485,900 (+2.85%) Land $2,124,700 Building $2,335,900 |
| 2025 | $111,085.00 (+1.01%) | $4,361,400 (+2.36%) Land $2,023,100 Building $2,338,300 |
| 2024 | $109,976.00 | $4,261,000 Land $1,926,200 Building $2,334,800 |
Assessed value is set for property tax purposes and is not a market price estimate.
FEMA maps place 23 4th Ave in Zone X, an area of minimal flood risk, within 500 ft of a high-risk flood zone.
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 |
|---|---|
| Nearest Special Flood Hazard Area | Zone AE, within 500 ft |
| 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.
The area around 23 4th Ave has no burnable land within ember reach, so its wildfire risk is not rated.
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 | BURLINGTON WATER DEPT serves 25,864 people · EPA ID MA3048000 |
|---|---|
| Water Source | Surface water |
| Last State Inspection | Dec 2025 |
| Lead | 2 ppb (2026) 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 25 locations within half a mile, as of December 31, 2025
| Provider | Max Down / Up (Mbps) |
|---|---|
| Verizon Fiber | 2,300 / 2,300 |
| Xfinity Cable | 2,000 / 2,000 |
| Astound Broadband Cable · Fiber in parts of the area | 1,500 / 50 |
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