{"nrhp_refnum":"74000911","name":"Clapp Houses","other_names":["\"Roger\" Clap House","William Clapp House"],"category":"building","location":{"address":"199 and 195 Boston St.","address_restricted":false,"city":"Boston","county":"Suffolk County","state":"MA","lat":42.320176219000075,"lon":-71.05640229899996,"geom_source":"nps_gis"},"listed_date":"1974-05-02","is_nhl":false,"nhl_designated_date":null,"areas_of_significance":["Agriculture","Architecture"],"significance_levels":["local"],"summary":{"what_it_is":"Two adjacent houses, the Roger Clap House and the William Clapp House, with a barn and shed, at 195 and 199 Boston Street in the Dorchester section of Boston. The Clap House was built in 1765 and the Clapp House in 1806.","why_significant":"The nomination presents the houses as illustrations of mid-18th and early-19th century architecture in Dorchester. The Roger Clap House is a Colonial building constructed for Captain Lemuel Clapp, while the William Clapp House is Federal in style. The Clapp family farm also produced Clapp's Favorite pear, developed in 1849 and still widely grown commercially.","narrative":"Two neighboring houses at Boston and Enterprise Streets in Dorchester, Boston, preserve the architecture and farming history of one local family. The Roger Clap House, a two-story wood-frame building with a gambrel roof, was essentially built in 1765 for Captain Lemuel Clapp, a tanner and Revolutionary War officer, by Samuel Pierce. Tradition links its oldest portions to the 17th-century home of Roger Clap. It was moved about 200 feet to its present site in 1957. The William Clapp House, a two-story Federal-style building with a hipped roof, was built in 1806 by housewright Samuel Everett for Lemuel's son William. A Greek Revival wing and an Italianate porch were added later. William's sons developed many pear varieties on the family farm, including Clapp's Favorite, introduced in 1849. The Dorchester Historical Society acquired both houses in 1946 and uses them as a museum and headquarters. A barn and a shed with an early privy also stand on the site.","period_of_significance":"18th and 19th centuries (specific dates 1765, 1806)","architect_builder":"Samuel Pierce (Roger Clap House, 1765); Samuel Everett, housewright (William Clapp House, 1806)","architectural_style":"Colonial (Roger Clap House); Federal (William Clapp House), with Greek Revival wing and Italianate porch additions","criteria":[],"status_note":"Owned by the Dorchester Historical Society and used as a museum and society headquarters; condition given as good and altered. The Roger Clap House was moved about 200 feet in 1957.","vacant_flag":false,"machine_generated":true,"model":"claude-sonnet-5-5","prompt_version":"v1.0-2026-10-29","generated_at":"2026-10-29 02:11:54.013603-05","source_pdf":"https://s3.amazonaws.com/NARAprodstorage/opastorage/live/66/7966/63796666/content/electronic-records/rg-079/NPS_MA/74000911.pdf"},"photo":{"url_800":"https://nationalhistoricalregister.com/media/74000911/1a2441b2ac-800.webp","url_1600":"https://nationalhistoricalregister.com/media/74000911/1a2441b2ac-1600.webp","licence":"CC BY-SA 4.0","author":"User:Magicpiano","credit_html":"<a href=\"https://commons.wikimedia.org/wiki/File:BostonMA_ClappHouses.jpg\" rel=\"noopener\">User:Magicpiano</a>, <a href=\"https://creativecommons.org/licenses/by-sa/4.0\" rel=\"license noopener\">CC BY-SA 4.0</a>, via Wikimedia Commons","source_page":"https://commons.wikimedia.org/wiki/File:BostonMA_ClappHouses.jpg"},"district":null,"sources":{"nps_snapshot_date":"2026-05-22","nara_catalog":"https://catalog.archives.gov/id/63796666","wikipedia":"https://en.wikipedia.org/wiki/Clapp_Houses","wikidata":"https://www.wikidata.org/wiki/Q5125887"},"indexable":true,"url":"https://nationalhistoricalregister.com/massachusetts/suffolk-county/clapp-houses-74000911/"}