From basements to roof terraces: adding value to London’s super prime properties

In London’s prime postcodes, space is a luxury. Homeowners in Mayfair, Knightsbridge, Belgravia and Chelsea are looking for space without moving. Two routes do most of the work: digging a basement, or building out on the roof.

Basement Extensions: The Space Creator

In densely built areas, extending downwards offers significant advantages. Basements can be transformed into luxury amenities such as:

• Private cinemas with acoustic insulation and bespoke seating
• Wellness suites featuring pools, saunas and treatment rooms
• Wine cellars and tasting areas with climate control
• Secure underground parking for classic and supercars

While basement projects are complex and require experienced contractors, the results can dramatically increase both usable space and property value.

Roof Terraces: Elevating Lifestyle and Views

Where basement extensions go below, roof terraces open up the skyline. A well-designed terrace offers:

• Outdoor kitchens and entertaining spaces
• Fire pits, ambient lighting and weather-proof furniture
• Landscaping that creates a private oasis above the city
• Panoramic views, adding a sense of luxury and exclusivity

For period properties, roof terraces require careful planning and expert handling to comply with building regulations and conservation requirements.

How NU Projects handles both

Both routes involve strict planning rules, structural work and a high level of finish. NU runs the design, the cost plan and the build under one contract. That means one team is answerable from planning consent through to the last detail.

Maximising Property Value

When done correctly, these renovations not only improve living experience but also significantly enhance asset value. In prime areas where property prices are measured in thousands per square foot, additional space, whether underground or on the roof, translates directly to higher returns.

If you are weighing up a basement or a roof terrace, we can walk you through what each one involves.

To talk to the team, send two lines through the contact form. You can also call 020 7731 6841. We usually reply within a few hours, weekends included.