across the u.s.mid-century modernsold nationwide
Techbuilt and Deck House homes
Two families of modern post-and-beam houses from Massachusetts. Architect Carl Koch introduced the Techbuilt house in 1953, and more than 3,000 kits sold before 1963. Deck House, founded in 1959 by two former Techbuilt people, made thousands more, mostly on the East Coast.
The housesThe rulesBefore you buy
- Techbuiltfrom 1953architect Carl Koch
- Techbuilt kits3,000+sold before 1963
- Deck Housefrom 1959Acton, Massachusetts
- Deck Housesthousandsmostly on the East Coast
the houses
What makes them distinctive
- Techbuilt: frame and panelsA standardized post-and-beam frame (steel posts, wood beams) with stressed-skin plywood wall panels on a 4-foot module.
- Techbuilt: half in the groundA concrete-block foundation with the lower floor about three feet below grade, and no attic or basement.
- Techbuilt: the roofA gently pitched gable roof with deep overhangs and glazed gable ends; radiant heat under the floors in documented examples.
- Deck House: posts, beams and deckingExposed posts and beams on an 8-foot module, with 3-inch tongue-and-groove “deck” boards forming the floors and roof.
- Deck House: wood and glassMahogany window frames with fixed glass and steel casements, vertical cedar siding, low-pitched roofs and carports.
protection
Designation and the rules
- A Techbuilt on the National RegisterThe James Swallen House in New Canaan, Connecticut, a Techbuilt, was listed in 2010. Listing alone doesn’t restrict private owners.
- Lexington’s conservation districtLexington, Massachusetts adopted the Turning Mill Neighborhood Conservation District in 2018 (113 parcels, including a Techbuilt cluster on Demar Road); alterations there need approval, under rules the town calls less restrictive than a local historic district.
- A proposed Deck House districtConcord, Massachusetts studied a local historic district for Jennie Dugan Road, with 13 Deck Houses from 1960 to 1968, in 2020; we couldn’t confirm whether it was adopted.
before you buy
What to check before you buy
- Single glassOriginal Techbuilt wall panels have a single pane of plate glass or two metal sliding windows.
- Radiant floorsFind out whether the original under-floor radiant heat is still in use.
- The frame is the houseThe posts, beams and panels carry the loads, so have an engineer look at any remodel that moves walls or glass.
- AdditionsMany of these houses have had additions; ask what’s original.
- Deck House windows and ageCheck the mahogany frames and steel casements; Concord’s study notes these houses are increasingly in need of updating.
Where they cluster: Lexington’s Middle Ridge and Turning Mill area has about 35 Techbuilts among some 95 homes, Ann Arbor has 15 identified, and Deck Houses gather around Concord, Massachusetts and North Carolina’s Triangle. Production counts vary by source, from at least 7,000 Deck Houses to more than 20,000 counting later companies.
sources
Where this comes from
Checked October 20, 2026.
- National Park Service: James Swallen House (Techbuilt House) nominationFrame, panels, radiant floors, 3,000+ kits.npgallery.nps.gov/GetAsset/d002bfbf-82d2-430d-9213-b13251617917
- Town of Lexington: Area I, Middle Ridge / Turning Mill4-foot module, 32 states by 1957, the Techbuilt cluster.www.lexingtonma.gov/DocumentCenter/View/3540/Area-I---Middle-Ridge---Turning-Mill-PDF
- Town of Concord: Jennie Dugan Acres proposed district (draft, 2020)Deck House founding, decking, windows.concordma.gov/DocumentCenter/View/25868/Jennie-Dugan-Historic-District---History-and-Significance
- NCModernist: Deck House and TechbuiltCompany history, models.ncmodernist.org/deck.htm
- A2Modern: Techbuilt homes (2022)Lower floor below grade; Ann Arbor examples.www.a2modern.org/?p=27869
- Kazys Varnelis: Notes on Deck HousesAt least 7,000 Deck Houses, mostly on the East Coast.varnelis.net/articles/notes-on-deck-houses/
- National Park Service: National Register FAQNational Register listing places no restrictions on what a non-federal owner may do with their property.www.nps.gov/subjects/nationalregister/faqs.htm
questions
Questions we hear
Who designed the Techbuilt house?
Architect Carl Koch, who introduced it in 1953; more than 3,000 kits sold in the U.S. before 1963, and by 1957 they’d been built in 32 states.
How is a Deck House different?
Deck House, founded in 1959 by two former Techbuilt people, uses an 8-foot post-and-beam module with thick tongue-and-groove decking for the floors and roof.
Where are most of them?
Mostly in New England and along the East Coast, with clusters in Lexington and Concord, Massachusetts, and in North Carolina’s Triangle.
more to learn
Keep going
- Mid-century modern across the U.S.Every guide in the series, coast to coast.
- Mid-century modern homes in Silicon ValleyThe style at home: where it is, what to look for.
- Silicon Valley Eichler tractsEvery Silicon Valley Eichler tract we cover, with live listings.
- Builder FilesThe builders and architects behind Bay Area homes.
General information from the sources listed, checked October 20, 2026; not legal, preservation or construction advice. Confirm designation and permit rules with the local preservation office before you buy or remodel. The Boyenga Team represents buyers and sellers in Santa Clara County, bay-side San Mateo County and San Francisco.
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