Twin sisters Leslie Davis and Lyndsay Lamb have carved out a specialized niche in the volatile Seattle-area real estate market by renovating and selling houses deemed "unsellable." Whether it’s dreadful, dated interiors or exteriors with zero curb appeal, this duo brings the determination and creativity needed to make the seemingly impossible happen — and on a reasonable budget.

Here we highlight some of their most distinctive renovations from their HGTV series Unsellable Houses. Also included are a sampling of their renos as seen in HGTV's competition series Rock the Block, as well as a house tour of the place that Lyndsay and her husband call home.

Lyndsay and Leslie created this bold, glitzy and era-specific living room vignette in hopes of selling a client's second home for top dollar. The restored fireplace boasts a panel surround painted in deep indigo, as well as a raised hearth covered in high contrast black-and-white patterned tile. The space also received new hardwood floors in a blonde finish. Lyndsay and Leslie staged the hearth with a vintage case-design portable record player and other period accessories.

The twins chose purposeful and eclectic furnishings for the rest of the living room, inspired by mid-century (and earlier) designs, including this stylish sofa upholstered in emerald green, graphic throw pillows and contemporary wall art. "My style here was subtle 1920s-era with a bit of Art Deco," said Lyndsay.

This renovated kitchen sparkles with a ceiling-height white subway tile backsplash, bright-white lower cabinets and stone countertops. The crisp, creamy theme of the space is warmed and softened with a gray-and-white patterned area rug, hardwood floors and floating shelves in a dark stain.