And it sleeps seven comfortably.

So how do you make the interior of a seashell-size abode feel as expansive as King Triton’s castle?

“It’s more like designing for a tour bus.”

600 Square Foot Yellow Beach Cottage in Seaside, FL

Credit: Joseph de Leo; Styling: Liz Strong

Here’s how she solved that small-space conundrum.

The double-duty ingenuity continued in the bedrooms, where a tailor-made armoire provides accessible storage in the primary.

A shape-shifting dining table further enhances the home’s space smarts.

600 Square Foot Beach Cottage Entry Console Table

(It’s actually one of the owners' closets!)

Come nightfall, slats pull out to convert the banquette into a twin bed.

“It lets you pile more people in there if you oughta,” Crowell says.

600 Square Foot Beach Cottage Console Table with Built In Seat

Hard-wearing seat cushions clad in Sunbrella fabric stand up to spills.

Above the U-shaped dining nook’s secret storage, a glittering focal point steals the show.

“But it ended up being my favorite part.”

600 Square Foot Cottage Living Room and Dining/Sleeping Nook

The bright pink Koncept sconce is mounted on the wall and pivots for practicality.

Another vertical move was the loft.

600 Square Foot Beach Cottage Breakfast Nook with Hidden Storage

600 Square Foot Beach Cottage Pull Out Bed Nook

600 Square Foot Beach Cottage White Kitchen with Teal Smeg Fridge

Credit: Joseph de Leo; Styling: Liz Strong

600 Square Foot Beach Cottage Master Bedroom with Canopy Bed

600 Square Foot Beach Cottage Reading Loft with Day Bed and Bookshelves

600 Square Foot Beach Cottage Bunk Beds

Credit: Joseph de Leo; Styling: Liz Strong

600 Square Foot Cottage Porch with Teal Furniture

600 Square Foot Beach Cottage Porch Dining Table

600 Square Foot Beach Cottage Outdoor Shower