£/m² Building Prices  ·  London & UK  ·  Updated April 2026 If you are planning a home extension in London, one of the first questions you will ask is: how much is this going to cost? It is also one of the most difficult questions to answer precisely — because no two extension projects are the same. At Excela Architecture London, our home extension architects work with clients across London at every stage of the design and planning process. From our experience delivering ext

Your complete guide to what you can build without planning permission in London — and how Excela Architecture's expert loft conversion architects help you make the most of your permitted development rights. Permitted development rights allow homeowners in London to extend and improve their homes without going through the full planning application process. For many London properties — from Victorian terraces in Ealing to semi-detached homes in Bexley — permitted development re

Everything you need to know about architectural drawings, planning permission, and working with expert home extension architects in London. A home extension is one of the most rewarding ways to transform your London property — creating the space your family needs without the upheaval and expense of moving. But the success of any extension project rests on a single foundation: the quality of your architectural drawings and the expertise of your chosen home extension architects

Dormer loft conversion under construction in London.

If you're a landlord thinking about converting a property into an HMO — or you already run one and you're not entirely sure whether your planning position is watertight — you're in the right place. HMO planning rules can feel like a maze, and in London especially, the landscape keeps shifting. This checklist walks you through everything you need to know in plain English, so you can move forward with confidence. First Things First: What Is an HMO? An HMO (House in Multiple Occ

At Excela Architecture London, we specialise in HMO Licensing and Planning Permission across the UK, supporting clients through the complexities of converting properties into Houses in Multiple Occupation (HMOs). Navigating both planning permission and licensing requirements is essential to ensure your project is compliant, efficient, and successful. Understanding the Relationship Between HMO Planning and Licensing When converting a property into an HMO, two separate approval

When planning a home improvement project such as a home extension, loft conversion, or internal remodel , finding the right structural engineer is an essential step. Structural engineers ensure that any changes to your property remain safe, stable, and compliant with building regulations . At Excela Architecture London , we make the process much easier. Rather than requiring you to search for a separate consultant, we have an in-house structural engineer , allowing us to prov

In many cases — yes. If your home extension involves building on or within 3meters of a shared boundary, altering a party wall, or excavating close to your neighbour’s property, you’ll need a Party Wall Agreement under the Party Wall etc. Act 1996. This legal agreement protects both you and your neighbours by setting out how the works will be carried out, helping to prevent disputes and delays once construction begins. At Excela Architecture London, we make the process straig

HMO Conversions in London

Who this guide is for Property developers and landlords new to House in Multiple Occupation (HMO) conversions in London, looking for a practical, no‑nonsense walkthrough from first call to licence sign‑off. At a glance: what is an HMO? An HMO is a property occupied by three or more  people from two or more households  who share facilities (kitchen, bathroom, WC). In London, many boroughs require planning permission for HMO use (even for small HMOs) and all larger HMOs (6+ occ

With property prices in London continuing to rise, many homeowners are looking for smarter ways to gain more living space without the stress and cost of moving. One of the most popular solutions is a loft conversion . By transforming an unused attic, you can add up to 30% more space to your home—whether for an extra bedroom, home office, or playroom—while also increasing property value by as much as 20%. At Excela Architecture London , we specialise in designing and building

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At Excela Architecture London, we specialise in helping landlords, investors, and developers transform properties into compliant and...

By Excela Architecture London Navigating the planning application process in London can be complex, especially for homeowners,...

Finding the right architect in London can be a challenge, given the sheer number of professionals in the field. In this piece, we share our insights on the top architects to consider in 2025. If you're curious about the top architects in London for 2025, you've landed in the right spot. At Excela Architecture London, we believe that true talent should be recognised and celebrated, rather than kept under wraps. That's why we've compiled a list of the leading architects in the