Biophilic DIY HDB Makeover: Sustainable Design for a Forever Home (2026)

Architect and interior designer Winston Lim has crafted a unique, biophilic haven in his 3-room HDB flat in Pasir Ris. This sustainable forever home is a testament to his design philosophy, blending functionality with a deep connection to nature. The 800 sq ft space is a masterpiece of adaptability, designed to evolve with Lim's changing needs as both a homeowner and a cat owner.

One of the most striking features is the vertical green walls in the balcony and bathroom. These self-sustaining "hanging gardens" are a result of meticulous planning, ensuring the plants thrive without causing moisture damage. The system involves a waterproof layer covered with recycled felt, irrigated by condensate from the air-conditioning system. At night, solar-powered lights gently illuminate the foliage, creating a serene atmosphere.

Lim's design choices extend beyond aesthetics. Pegboards, typically found in workshops and retail spaces, are integrated into the home's design. These multi-functional wooden boards support display shelves, cabinets, lighting, and even a computer monitor, adding both functionality and visual interest. The living room, with its open spaces extending to the balcony, blurs the boundaries between inside and outside, creating a seamless flow.

The kitchen and dining areas feature a peninsula that serves as a prep area, dining table, and work desk. This design maximizes space and provides a versatile workspace. Wall and ceiling mirrors reflect light, brightening the dim internal space, while the black quartz countertop adds a touch of contrast.

The bedroom and home office showcase sliding mirrored doors that act as spatial dividers. Behind these mirrors are built-in wardrobes with vintage cabinets and armoires, adding a curated old-world charm. The bedroom can be converted into an exercise area or cat playroom with a remote-controlled Murphy bed and pegboards for displaying art and clothing.

Feline-friendly features are seamlessly integrated throughout the home, including a custom cat condo, feeding station, and a cabinet on the balcony that hides the litter box. Lim's design philosophy is evident in the multi-purpose rooms and furniture, which respond to the flat's compact layout, making efficient use of space.

The renovation process, undertaken by Lim himself, resulted in significant cost savings on labour. The total cost, excluding furniture and accessories, was approximately $92,000. The project took three months to complete, and Lim moved into his new home in April 2024. This transformation showcases how a thoughtful, biophilic approach to design can create a beautiful, functional, and adaptable living space.

Biophilic DIY HDB Makeover: Sustainable Design for a Forever Home (2026)
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