Go behind the design of the Mt. McKinley Princess Wilderness Lodge treehouse with interior designer, Christina!

Go behind the build of the Mt. McKinley Princess Wilderness Lodge treehouse with Pete!

Fast-forward the Treehouse Masters' build in Alaska for Mt.McKinley Princess Wilderness Lodge.

Go behind the build of singer Grace VanderWaal's "dream treehouse" with Pete!

Fast-forward the Treehouse Masters' sophisticated, sleek-and-chic treehouse in the heart of Dallas.

Go behind the design of the "Birdhouse" treehouse in Wisconsin with Christina.

Watch the "Birdhouse" treehouse in Wisconsin come to life in high-speed!

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Go behind-the-build of the Jeffersonian Honeymoon Suite in Virginia with Pete Nelson!

Fast-forward the Treehouse Masters' Jeffersonian Honeymoon Suite build in Virginia.

Go behind-the-build of the "Thrill 'n' Chill" Treehouse with Pete!

Fast-forward the Treehouse Masters' double-decker hideout in Texas Hill Country.

Go behind the build of the campers' glamping retreat in New Jersey with Pete Nelson!

Go behind the build of the team's first international treehouse in Norway!

Vanessa wanted to take her 16 year old treehouse from slumber parties to cocktail parties

Before she left for college, Naomi wanted to give her nieces and nephews a place to have adventures and experience nature like she as a child

Lolly and Peter are the proud owners of one of Pete's early treehouses - but it's in need of repairs and a transformation from art studio to guest room.

Pete and the crew travel to Utopia, Texas to build a dining room in the trees. Learn more about the intricacies of the design and build!

Pete meets up with Peter Bahouth, who shows him a getaway tucked into suburban Atlanta.

See how this record-breaking treehouse was built - in just 76 seconds!

Pete gives a tour of the biggest treehouse he's ever built!

Pete's got some Mardi Gras beads to hand out and he's convincing the guys to show off their, um, tool belts for a glittery reward!

This special treehouse will weigh 12 tons - so it needs a lot of support and special equipment to make sure the job gets done right.

CeeLo Green stops by the recording studio treehouse to spontaneously lay down a track with Pete. Wait until you see Pete dance and sing!

Join interior designer Christina Salway inside the Owl's Nest Library for Omni Montessori School

Pete loves the reclaimed wood he's using around this treehouse and Seanix loves the music vibes of the city and is inspired to write a song.

Pete and Cee Lo discuss the song, "F*** You."

After meeting his clients, John and Deirdre, Roderick returns to his workshop to design a unique treehouse for their Connecticut property.

Pete reveals a beautiful recording studio in the trees, complete with cork walls, hanging guitars and creativity all around.

Pete is planning on building a triple decker treehouse - his biggest ever! - so he must find a tree strong enough to support this massive treehouse.

Step inside the winning family's treehouse in the Ultimate Treehouse Giveaway.

Unfortunately for the Nelson Treehouse and Supply team, a 4ft pipe wrench is no match for a white oak.