Smart-home technology is woven into this circa-1853 Sag Harbor Federal-style house listed for $8.495 million.

Designer Steven Gambrel and the Historical Concepts architectural firm completed a full renovation of the 5,387-square-foot home in 2016, adding geothermal heat and a Lutron Radiora control system integrated for alarms, lighting, Sonos sound and TVs, says listing agent Susan Breitenbach of The Corcoran Group. The home also has radiant heat and Lefroy Brooks fittings throughout.

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The exterior of the seven-bedroom, 5½-bath house has a hand-split cedar roof, cedar siding, custom mahogany double-glazed windows and lead-coated copper gutters.

Inside, a double-height great room includes a fireplace and antique wide-plank pine floors.

The custom kitchen has marble counters, double marble sinks, a butler’s pantry and high-end appliances, including a French La Canche range.

Upstairs, the master bedroom suite features an en-suite full bathroom with an imported marble tub. Two additional bedrooms on the second floor have fireplaces and share a full bath.

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The third floor has two bedrooms and a full bath. Lower-level creature comforts include a media room, a wine cellar, a gym and a two-car garage.

The half-acre parcel has mature boxwood and specimen trees, a one-bedroom, one-bathroom guesthouse and a 14-by-33-foot heated saltwater pool.

A covered porch overlooks the pool and gardens. Reclaimed stone pavers and antique brick retaining walls were used for terraces on the grounds.