LHD boundaries as described are approximate and subject to change. Consult the LHD Study Report on file with the relevant local district commission or municipal authority to verify district boundaries and whether a specific property, particularly one in proximity of a boundary line, is within the district. Also note that LHD boundaries may differ from those of State or National Register Districts.
Late colonial, Federal, others.
Guilford was first settled in 1639 by a group of English Puritans. Settlement occurred in the area bounded by the West River and East Creek along the shore. The large central Green was established at this time, inspired by New Haven's Green and has been maintained, with only minor encroachments ever since. The Green is unmistakably the center, a spatial magnet that draws everything around it, including the approaching neighboring streets. The town began, like New Haven, with hopes of becoming a mercantile port. But conquering a wilderness turned out to be a longer, harsher thing that the early colonists had bargained for. Soon Guilford, like its sister towns, settled down to become an agricultural village. Fortunately its land was fertile and its harbor teemed with shellfish. It was soon supporting a community which, if not rich, was secure. Farming continued to be Guilford's mainstay, but it explored other avenues likes Coastal trade and shipbuilding industry and related maritime industries. [NR & 2]
Whitfield Street historic district is a special neighborhood towards the south of the town center. In recognition of its architectural and historical significance, the area is also listed in Guilford Historic Town Center, listed on the National Register on Historic Places in 1976. The unique nationwide significance of the Henry Whitfield House, the district's oldest structure, was officially established when it became a National Historic Landmark in 1997. 
 District information retrieved from the town website http://www.ci.guilford.ct.us/. Whitfield Street Historic District, Guilford, The Guilford Historic District Study Committee Report, Prepared by Cunningham Preservation Associates, 1999, SHPO Library, Hartford.  Assessors information and Parcel IDs retrieved from the website http://guilfordct.virtualtownhall.net/Public_Documents/GuilfordCT_Assessor/index. [NR] Raiche Stephen J., Guilford Historic Town Center, National Register Nomination Number- 76001988 NRIS, National Park Service, 1976 - http://pdfhost.focus.nps.gov/docs/NRHP/Text/76001988.pdf; http://pdfhost.focus.nps.gov/docs/NRHP/Photos/76001988.pdf.
The National Register Guilford Town Center historic district includes a large area with more than 700 structures, encompassing both the local historic districts of Guilford: Town Center historic district and Whitfield Street historic district.