Home Expansion: Double Storey Rear & Single Storey Side Extension | Hillingdon

Project Overview

* Location: Hillingdon, West London

* Services Provided: Concept Design, Architectural Drawings, Planning Permission Drawings & 3D Visualisations

* Key Features: Double Storey Rear Extension, Single Storey Side Extension and Internal Reconfiguration

Executive Summary

This project showcases full architectural design and planning drawing services for a comprehensive home transformation in the London Borough of Hillingdon. The scope involved designing a multi-tier addition comprising a double-storey rear extension alongside a single-storey side extension, accompanied by complete internal layout reconfiguration and roof integration.

By combining technical expertise in local planning policies with detailed spatial planning, the proposal maximises living area across multiple floors while maintaining harmony with adjacent properties.

Key Architectural & Design Features

* Ground Floor Open-Plan Living: The single-storey side and double-storey rear additions extend the ground floor footprint significantly to create a spacious open-plan kitchen, dining, and family room featuring seamless garden connections and optimized natural light penetration.

* First-Floor Spatial Optimization: The upper level of the rear extension extends the bedroom layouts and expands bathroom accommodations without impacting light access for neighbouring properties (No. 7 and No. 11 boundary lines).

* Roofline Integration: A multi-pitched roof strategy—combining flat, pitched, and crown elements—integrates the new structures cleanly with the existing loft roofline and main dwelling structure.