Four of the top five are currently existing. 

1. 790'     200 Clarendon Street, (1976, Back Bay)
2. 749'     Prudential Tower (1964, Back Bay)
3. 742'     Four Season Private Residences One Dalton Street, Boston (Under Construction, Back Bay)
4. 685'     Millennium Tower (2016, Midtown)
5. 614'     Federal Reserve Bank Building (1977, Downtown/Waterfront)
[...]

Boston's streets are lined with countless properties of historical and architectural significance. In Beacon Hill, perhaps Boston's most historic neighborhood, 32 Lime Street is one such architectural treasure, featuring a second-floor great room of exceptional size and scale. The great room takes influence from 17th-century English design [...]

Back Bay remains one of Boston's most desirable residential neighborhoods, as evidenced by the number of transactions that take place at or above a property's asking price.

On average in Back Bay during 2017....

• All studios traded 2.3% above asking price
• All 1-bed condos traded 0.5% above asking price
• All 2-bed condos traded 0.5% below asking
[...]

Boston’s 10 most expensive townhouse and single-family sales of 2017

Back Bay, Beacon Hill and South End contain the city's top townhouse and single-family sales. Properties marked with an asterisk (*) represent sales for which Campion and Company represented the Seller and/or Buyer. 

Source: LINK

Boston’s 10 most expensive condominium sales of 2017

The city's top condominium sales are concentrated within Back Bay, Beacon Hill and Midtown and represent a mix of boutique and full-service homes. All properties except the sale at 25-27 Commonwealth Avenue are either brand new construction, or were recently built within the last few [...]

10 Farnsworth is Fort Point’s Newest Gem

10 Farnsworth is Boston’s newest boutique luxury development in the Seaport District's Fort Point Neighborhood. Nine exceptional residences enjoy direct elevator access, an on-site garage with automated parking system and a combination of shared and private roof [...]

A Flower-Inspired Building Has Sprouted in the North End

Luxury Homes Coming to The Boulevard on the Waterfront

This snapshot provides average asking prices per square foot in 13 Boston neighborhoods. The prices listed are for the first three quarters of 2017, below which are the percent changes from the same period last year. 

For the neighborhoods in this analysis—which does not include all of the neighborhoods of Boston—the overall price range for the city through September ranges from $488 per square foot in East Boston to $1,219 per square foot in Midtown. Because Boston's product is very limited, individual buildings can have a large effect on price per square foot statistics. In West End, for example, the delivery of units at Forecaster 121 has helped to raise average pricing there over 22%.

Click the below graphic to expand.

10 Farnsworth is Fort Point’s Newest Gem