21 N Mason Road, Brookline, NH 03033

• 4 beds |
• 3 baths |
• 4,028 sqft

Property Description

Better than new construction, this meticulously maintained 4-bedroom colonial in Brookline, NH, features a backyard oasis and premium upgrades throughout. The first floor offers a bright and welcoming foyer leading to a spacious kitchen with stainless-steel appliances, granite countertops, and large island with an overhang for additional seating. The main level also includes a generously sized and bright living room with a gas fireplace, a formal dining room, convenient first floor laundry room, and a half bath. The second floor boasts a large primary bedroom with a walk-in closet, an ensuite full bathroom, and direct access to the large, finished bonus space above the garage, currently being used as a home office. Three additional bedrooms and another full bathroom complete the second floor. The finished basement offers additional living space and flexibility, with space currently used as a spare bedroom, while the unfinished section provides excellent storage options. Outside, you'll find a fully fenced backyard featuring a large deck with composite decking that steps down to an expansive patio, a newer swim spa, extensive ambient light setup, a shed for extra storage and ample space for gardening. Additional upgrades and improvements include an upgraded irrigation sprinkler system with digital rain sensors, central A/C, Rinnai on demand hot water heater, generator hookup, security lights and cameras, keyless entry, and a sizeable attached two-car garage. All situated on a private 2.45-acre lot with convenient access to local amenities.

Listing Status:

Active

Date Added:

May 27, 2026

Data Last Updated:

June 14, 2026 at 6:59AM

Listing Office:

Realty One Group Next Level : 888-888-7653

Listing Agent:

Andrew Whelan : 603-362-7080 : Info@listedbywhelan.com

MLS ID:

5091271

Interior

• General: BlindsDining AreaGas Fireplace1 FireplaceKitchen IslandKitchen/DiningKitchen/FamilyKitchen/LivingLaundry Hook-upsLiving/DiningPrimary BR w/ BANatural LightSecurityIndoor StorageWalk-in ClosetProgrammable Thermostat
• Appliances: DishwasherDryerRange HoodMicrowaveGas RangeRefrigeratorWasherOn Demand Water Heater
• Basement: Climate ControlledFinishedFullInsulatedExterior StairsInterior StairsStorage SpaceInterior AccessExterior AccessBasement Stairs
• Flooring: CarpetHardwoodTile
• A/C: Central AC
• Heating: Propane
• Disability Feature: 1st Floor 1/2 BathroomHard Surface FlooringPaved Parking1st Floor Laundry

Exterior

• General: DeckFull FenceGarden SpaceHot TubNatural ShadePatioAbove Ground PoolShedStorage
• Style: Colonial
• Parking: Auto OpenDirect EntryDrivewayGarageParking Spaces 5 - 10Parking Spaces 6+PavedAttached

Construction

• Roofing: Shingle
• General: Wood FrameVinyl SidingConcretePoured Concrete

Location

• Road/Access: PavedPublicPublic Maintained Road
• School District: Brookline School District
• County: Hillsborou

Lot

• Driveway: Paved
• Zoning: 02 - RESIDENTIAL/AGRICULT

Utilities

• Utilities: Cable AvailableTelephone Available
• Water: Drilled WellPrivate
• Sewer: 1250 GallonConcretePrivateSeptic