Building · 2026
131 Hartwell Ave Residential Bldg
Lexington, MA · near Laurence G Hanscom Fld (1.2 mi)
What this outcome means
The FAA studied the proposal and concluded it would not be a hazard to air navigation. A no-hazard determination is not permanent — it carries an expiration date, and if the structure is not built by then the case has to be re-filed.
The proposal, in the filer's words
"Refiling the proposed residential building originally filed under ASN 2025-ANE-3074-OE with additional points and details. The internal parking structure will be filed as a separate structure following this filing. The building will be built on a slope with an average grade of 182' and first floor elevations that vary between parts of the building- as filed (see section view drawing attached for additional context). Rooftop mechanical equipment located at Points 2 and 4 represent the maximum height of the building at 273' NAVD88. The north portion of the building contains the highest elevations. The heights filed include a 10-foot buffer to account to for potential variances. A site plan figure and section view drawing are attached. The existing building on site will be demolished and construction crane(s) will be filed at a later date."
Filing details
- Case number (ASN)
- 2026-ANE-880-OE
- Structure
- 131 Hartwell Ave Residential Bldg
- Type
- Building / multi_unit
- Category
- Building
- Height above ground
- 90 ft
- Height above sea level
- 290 ft
- Site elevation
- 200 ft
- Notice of
- New Construction
- Duration
- Permanent
- Marking & lighting
- —
Timeline
- Filed
- March 30, 2026
- Determined
- July 8, 2026
- Determination expires
- January 8, 2028
A determination that lapses before the structure is built has to be re-filed. The FAA does not send a reminder.
Who filed it
- Sponsor
- JLB Realty LLC
- Representative
- VHB Engineering
Names are shown as they appear in the FAA's public record. How we handle names
Location
- Coordinates
- 42.463178, -71.268289
- Degrees / minutes / seconds
- 42°27'47.4"N 71°16'05.8"W
- County
- Middlesex
- Open in a map
- Google MapsOpenStreetMap
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About this record
This page is a readable copy of a public record published by the FAA's Obstruction Evaluation / Airport Airspace Analysis system. It is not the official record and may lag it. For the authoritative case status, search this ASN at the FAA's OE/AAA portal. If something here is wrong, email support@idea-engine.studio and we will correct it.
Source: FAA Obstruction Evaluation / Airport Airspace Analysis (OE/AAA) public archive (oeaaa.faa.gov), data as of September 12, 2026. Compiled by LOS Analyzer (Idea Engine LLC). This is not an official FAA record or an FAA determination; the FAA's portal is authoritative. LOS Analyzer is not affiliated with or endorsed by the FAA.
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Check Part 77 and the tower's line of sight before you file
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