House Extension Southwark | Rear & Side Extensions

House Extension Specialists in Southwark SE1

Expanding your home in Southwark is a smart investment. With property values in SE1 among the highest in South London — driven by the area’s proximity to London Bridge, the City, and world-class cultural attractions like Tate Modern and Borough Market — a well-designed house extension can add tens of thousands of pounds to your home’s value while giving you the space you need today.

Our House Extension Services in Southwark

Crown Architecture designs and delivers all types of house extensions in SE1:

• Single-Storey Rear Extensions: Open up your ground floor with a generous kitchen-diner or family room. We design rear extensions that flood your home with natural light and create a seamless indoor-outdoor connection to the garden.
• Two-Storey Extensions: Add a bedroom and bathroom above a new ground-floor room, doubling the benefit of a single planning application. Two-storey extensions in Southwark are subject to full planning permission and must comply with the borough’s design policies.
• Side-Return Extensions: Many Victorian terraces in Bermondsey and Walworth have a narrow side return that can be incorporated into a side extension, dramatically widening the kitchen and living areas.
• Wraparound Extensions: Combine a rear extension with a side-return extension to create the maximum possible ground-floor footprint. Wraparound extensions transform the layout of Victorian and Edwardian terraces.
• Over-Structure Extensions: Where a garage, utility room, or outbuilding exists, we can design a first-floor extension above, adding bedroom space without reducing the garden.

Planning in Southwark SE1

London Borough of Southwark administers planning for all house extensions in SE1. Single-storey rear extensions up to 6 metres (detached) or 4 metres (terraced/semi-detached) may fall within permitted development, subject to the Prior Approval process. Extensions in conservation areas and on listed buildings require full planning permission. Our architects navigate all of this on your behalf.

Call or Text: 07443804841

Testimonials

• “Crown Architecture designed our wraparound extension in Walworth. The planning was approved first time and the result is absolutely stunning.” — Alexa Young, London
• “They managed everything — surveys, drawings, planning, Building Regs. We just moved in at the end and enjoyed our new space.” — Morgan James, Islington
• “Top-class architects. Our side-return extension in SE1 transformed our Victorian terrace.” — Lisa Driver, Milton Keynes

Related Pages: Architect in Southwark | Loft Conversion Southwark | House Extension Camberwell SE5

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