Boston register office has moved from County Hall to the borough council’s headquarters in West Street.
People can now register births and deaths at the new purpose-built offices on the ground floor of the Municipal Buildings.
The Mayor’s Parlour will be available for marriages and civil partnerships involving up to 20 people.
The historic council chamber can be used for larger ceremonies of up to 50 guests.
Wedding ceremonies that have already been booked will continue to take place at County Hall until January 2013.
Coun Martin Hill, leader of Lincolnshire County Council, said: “The changes in Boston are good news for local people, making it easier to access a range of services in one central location.
“And by sharing a home with the borough council, we can be sure taxpayers get even better value for money.”
Besides births, deaths, marriages and civil partnerships, Lincolnshire Registration and Celebratory Services also offer renewal of vows, naming, civil funerals and other ceremonies.
l To make an appointment with the register office call 01522 782244 (weekdays 8am-6pm; Saturdays 9am-4pm) or book online by visiting www.lincoln shire.gov.uk/onlinebookings.