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Pimlico Conservation Area Flats Expansion

Modern Elegance and Comfort

This ambitious project showcases our expertise in sensitively expanding and renovating properties within conservation areas. Located in the heart of Pimlico's Conservation Area, we were tasked with expanding two ground and lower ground floor flats while respecting the area's architectural heritage and strict planning regulations.

Project Overview

The scope of this complex expansion and renovation encompassed:

  • Removal and underpinning of external walls to support load-bearing masonry of multiple flats above

  • Establishment of new foundations using a mini pile rig

  • Creation of seamless extensions blending with surrounding mansion blocks

  • Maximisation of natural light, particularly on the lower ground floor

  • Development of open-plan kitchen, living, and dining spaces

  • Addition of en-suite facilities to bedrooms where feasible

  • Comprehensive update of all building services

Design Approach

Our design strategy focused on harmoniously blending contemporary living requirements with the historical context of the Pimlico Conservation Area. We carefully planned the extensions to integrate seamlessly with the existing architecture, using materials and forms that respect the area's character while maximising space and light.

Innovative Features

We incorporated several innovative elements to enhance the properties:

  • Advanced underpinning techniques to support existing structures

  • Bespoke lighting solutions to enhance natural light in lower ground areas

  • Energy-efficient systems including smart home technology

  • Carefully designed layout to optimise space and functionality

Challenges and Solutions

The project presented significant structural challenges, particularly in supporting the load-bearing masonry of the flats above while expanding the ground and lower ground floor spaces. Our team's expertise in complex structural work and close collaboration with engineers ensured that we could achieve our clients' vision while maintaining the integrity of the entire building.

Services Provided

For this Pimlico Conservation Area project, we offered a comprehensive range of architectural services:

  • Initial concept design and structural feasibility study

  • Detailed architectural and structural engineering drawings

  • Heritage impact assessment and conservation area analysis

  • Planning application and negotiations with local conservation officers

  • Building regulations compliance

  • Party Wall agreements with neighbouring properties

  • Tender documentation and specialist contractor selection

  • Project management and on-site supervision

  • Interior design consultation


The result is a stunning transformation that seamlessly blends historical charm with contemporary living. The flats now boast increased living space, improved functionality, and modern amenities while retaining their original character from the street view. This Pimlico Conservation Area flats expansion stands as a testament to our ability to enhance heritage properties, creating homes that honour their past while embracing modern lifestyles.This project exemplifies our commitment to preserving architectural heritage while delivering innovative, light-filled living spaces that meet the needs of contemporary homeowners in London's most prestigious neighbourhoods. It showcases our expertise in handling complex structural challenges and our ability to transform period properties to dramatically enhance the quality of life for residents in conservation areas.

James Williamson Architects is committed to delivering innovative and sustainable design solutions that enhance living spaces while respecting historical contexts. Contact us to learn how we can help transform your property.

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