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Semi-Detached Family Home Expansion in Sussex

Spacious Modern Living

This ambitious project showcases our expertise in transforming modest homes into spacious, modern living spaces that cater to growing families. Our clients, a young family, approached us with the vision of expanding their 2-bedroom semi-detached house in Sussex into a generous 4-bedroom family home that would meet their evolving needs.

Project Overview

The scope of this comprehensive expansion and renovation encompassed:

  • Design and construction of a two-storey side and rear extension

  • Creation of an expansive open-plan kitchen, living, and dining area

  • Addition of a utility room and downstairs cloakroom

  • Relocation of the family bathroom to the new side extension

  • Addition of an extra bedroom on the first floor

  • Creation of a master bedroom suite with en-suite bathroom and walk-in wardrobe

Design Approach

Our design strategy focused on maximising space and functionality while creating a seamless flow between the existing structure and the new extensions. We prioritised an open-plan layout on the ground floor to create a light-filled, spacious living area that caters to modern family life.

Innovative Features

We incorporated several innovative elements to enhance the property:

  • Open-plan kitchen, living, and dining area for flexible family living

  • Strategically placed utility room to improve household efficiency

  • Downstairs cloakroom for added convenience

  • Relocated family bathroom to optimise first-floor space

  • Master bedroom suite with luxurious en-suite and walk-in wardrobe

Challenges and Solutions

The main challenge was significantly increasing the living space while ensuring the extension integrated harmoniously with the existing semi-detached house. Our team's creative design solutions and meticulous planning ensured we could achieve our clients' vision without compromising the building's aesthetic appeal or the comfort of neighbouring properties.

Services Provided

For this Sussex family home expansion, we offered a comprehensive range of architectural services:

  • Initial concept design and feasibility study

  • Detailed architectural drawings and 3D visualisations

  • Planning application and negotiations with local authorities

  • Building regulations compliance

  • Party Wall agreements with neighbouring properties

  • Tender documentation and contractor selection

  • Project management and on-site supervision

  • Interior design consultation


The result is a stunning transformation that has doubled the number of bedrooms and significantly enhanced the living space and functionality of the home. The once-modest semi-detached house is now a spacious, modern family home that seamlessly blends style with practicality. This Sussex family home expansion stands as a testament to our ability to reimagine and expand existing properties, creating homes that adapt to the evolving needs of growing families.This project exemplifies our commitment to creating functional and beautiful living spaces that meet the changing requirements of modern families. It showcases how thoughtful architectural intervention can transform a standard semi-detached house into a bespoke family home that offers both comfort and style, demonstrating our expertise in maximising the potential of residential properties in Sussex and beyond.

James Williamson Architects is dedicated to creating functional and beautiful living spaces that meet the evolving needs of families. Contact us to discuss how we can help transform your home.

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