Private company

Koehler & Isaak

American architectural firm

Koehler & Isaak was an architectural firm active in Manchester, New Hampshire, from 1946 to 1970 and under other names until 1985. The firm had the largest architectural practice in New Hampshire at its height during the 1960s.2 Wikipedia text CC BY-SA 4.0

Last updated Oct 21, 2026.

Overview

Goulet Science Center 2
Photo: Ericci8996, CC BY-SA 3.0, via Wikimedia Commons3

Koehler & Isaak was an architectural firm active in Manchester, New Hampshire, from 1946 to 1970 and under other names until 1985. The firm had the largest architectural practice in New Hampshire at its height during the 1960s.2

Sources

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