
HEAD OFFICE
G D Construction (St Albans) Limited
Unit 4, Spring Valley Business Centre
Porters Wood, St Albans
Herts, AL3 6PD
20 Wimpole Street
Project Overview
Client
The Howard de Walden Estate
Completion Date
12.01.2026
Value
£1,100,000.00
Form of Contract
JCT Intermediate Contract

Project Description
This project involved the comprehensive refurbishment of a Victorian property containing three residential flats, including common parts and external upgrades. The works began with a full strip-out of all flats, including removal of existing finishes and services, and the safe decommissioning of gas supplies. EPC improvements were achieved through the installation of air source heat pumps for each flat, alongside secondary glazing to enhance thermal performance and energy efficiency. New water and electrical mains were installed, together with air handling units to improve ventilation and comfort. High-quality modern finishes were delivered throughout, carefully balancing contemporary aesthetics with retention of original Victorian features. Fire safety was a key consideration, with new fire-rated door sets and compartmentation strategies implemented to meet regulatory requirements. Additionally, acoustic floor separation was installed between levels to improve sound insulation and privacy. The project was completed to a high standard, successfully combining energy efficiency, safety, and heritage retention.
Challenges Overcome
A significant challenge was managing the presence of full-time tenants on the ground floor and basement level. To mitigate disruptions, GD Construction implemented careful planning and consideration, ensuring minimal impact on the tenants’ businesses.



