It’s the holiday season, we’re allowed to have big real estate dreams.

If you’ve ever strolled through the Boston Public Garden and thought, “I wish I could watch this place change seasons without ever putting on a coat,” the penthouse at 2 Commonwealth Avenue has an answer ready for you. And while we’re asking questions: how much are two valet parking spaces in the dead center of Boston worth? At The Carlton House, perched directly above the Public Garden, the answer is: priceless — and included.

This 4,083-square-foot corner penthouse duplex sits high above the city with the kind of panoramic sweep that makes even longtime Bostonians pause. Wrapped in floor-to-ceiling windows, the home lives in continuous dialogue with the landscape. Spring blooms, fall foliage, a fresh snowfall drifti

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