# Alteration or repair permit ALT1251048 at 125 Summer St, Boston

Boston Inspectional Services Department permit ALT1251048: issued Sep 29, 2021 for alteration or repair work at 125 Summer St. KLAVIYO - Floors 9, 10 &; 11 -; Tenant fit-out includes a new layout, interior partitions, new ceilings, and all new Architectural finishes on 9th,10th, and 11th.; Modify existing Electrical, Mechanical, Plumbing, and Fire protection systems..; E- Plans.

- Permit number: ALT1251048
- Issued: Sep 29, 2021
- Type of work: Alteration or repair (city: Fast Track Application, Long Form/Alteration Permit)
- Status: Issued (city: Open)
- Reported cost: $500,000
- ZIP code: 02110
- All permits at this address: https://nearbypermits.com/boston/address/125-summer-st/

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Source: Boston Inspectional Services Department permit data (https://data.boston.gov/dataset/approved-building-permits). Checked 2026-10-06 15:29 UTC. Nearby Permits, https://nearbypermits.com. JSON API and MCP server: https://nearbypermits.com/developers/

Every permit at 125 Summer St: https://nearbypermits.com/boston/address/125-summer-st/