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Mixed-use · Other activity

300 Third St, Cambridge, MA 02142

Neighborhood activity

Issued

What the public record says

PHASE 1: Multi-level renovation of existing offices/lab/process support spaces, and associated rooftop mechanical equipment. Referencing the included "300 Third St Phased Occupancy Plan", section "Phase 1 Renovaton", scope of work will include:-Level P1: Demo of existing process support spaces to rebuild new process support spaces-Level P2: Demo of existing pH room to rebuild new pH room & installation of new mechanical unit on low roof-Level 1: Rebuild/renovate partial floor plate for new lab space-Level 2: Demo of existing mechanical rooms to rebuild new mechanical rooms-Level 3: Mechanical riser work & fire alarm upgrades only-Level 4: Mechanical riser work, fire alarm upgrades, & roof structural steel upgradess only-Roof/Penthouse: Demo, replacement, & install of new mechanical rooftop units. This work will require the modification of existing exterior screenwall to accommodate new mechanical unit layout

Permit typeBuilding: Alteration and Addition
Declared job value$107,029,614
Permit record1202732
Related permits1202732

Recorded milestones

  1. Permit issued

Milestones apply to the recorded permits. They do not confirm that an entire development is complete or a business is open. No opening date is inferred.

Sources & confidence

Category labels may be inferred from official fields and scope descriptions. Related permits are grouped only where an explicit source project identifier is available. We do not combine unrelated permits merely because they share an address.

View original city source ↗

Retrieved 11/4/2026, 5:40:18 AM. Latest successful source retrieval.

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