Home Extensions in South London
South London offers incredible diversity — from the bustling energy of Brixton and Peckham to the leafy calm of Dulwich and Crystal Palace. The area's varied housing stock presents opportunities for every type of extension, from compact side returns on Victorian terraces to substantial two-storey additions on 1930s semis. We bring the same premium quality to every South London project.
Transforming Homes Across South London
Navigating South London's multiple borough councils requires local knowledge. Our architects are experienced with Southwark, Lambeth, Lewisham, Croydon, and Bromley planning departments — each with their own design preferences and approval processes.
Borough Property Profile
Various (Southwark, Lambeth, Lewisham, Croydon, Bromley)
SE1–SE28, SW2–SW20, CR0–CR8
Victorian terraces, Edwardian semis, 1930s suburban houses, post-war estates
Our Specialist Services in South London
Kitchen Extensions
Create the ultimate open-plan kitchen-diner. Explore our bespoke options available in South London.
Highly PopularLoft Conversions
Maximise vertical space with Dormer or Mansard conversions. Explore our bespoke options available in South London.
Highly PopularRear Extensions
Extend out into the garden with maximum glazed views. Explore our bespoke options available in South London.
Side Return Extensions
Transform unused side alleyways into living spaces. Explore our bespoke options available in South London.
Wraparound Extensions
The ultimate transformation combining side return and rear space. Explore our bespoke options available in South London.
Planning & Permitted Development in South London
South London's boroughs range from strictly controlled (Southwark, Lambeth) to more permissive (Croydon, Bromley). Conservation areas are concentrated in inner South London, whilst outer suburbs generally offer more straightforward permitted development.
Recent Work in South London
Luxury Mansard Loft Conversion
Clapham, SW4
Dead roof space transformed into a 28 m² master suite.
Victorian Side Return
Wandsworth, SW18
A forgotten alleyway became an 18 m² light-filled kitchen.
Double-Storey Extension
Dulwich, SE21
70 m² across two storeys with an ingenious internal light well.
Luxury Wet Room En-Suite
Battersea, SW11
A dated family bathroom transformed into a sleek, high-end wet room.
Why Homeowners in South London Choose APEX
From our Battersea En-Suite to our Dulwich Double-Storey Extension, our South London portfolio demonstrates our versatility and commitment to premium quality across every project scale.As an FMB-accredited builder, we don't just build; we engineer peace of mind. Every project is assigned a dedicated Project Manager to ensure seamless communication. We pride ourselves on transparent, fixed pricing with absolutely no hidden costs, backed by a comprehensive 10-year structural warranty.