Extension Architecture

  Cobham sits within Elmbridge, one of Surrey's most Green Belt heavy boroughs, and that single fact shapes almost every extension project here. Do I need planning permission for a Cobham extension? It depends entirely on whether the property sits on Green Belt or protected land, which covers a large share of Cobham. Where Green Belt status applies, full planning permission is almost always required, even for a fairly modest extension, since national policy treats disproportionate additions to Green Belt properties as a specific planning test. Outside Green Belt boundaries, many Cobham homes retain standard permitted development rights, allowing extensions up to 3 metres for terraced and semi-detached properties, or 4 metres for detached homes, without a full application. Checking which category a specific property falls into is the first step cobham architects take before any design conversation begins.  What counts as a disproportionate addition on a Green Belt plot? Natio...

Kensington looks like the kind of place where permitted development should make life simple. It isn't. Most homeowners here start their research assuming the same national rules apply as anywhere else in London. In practice, Kensington & Chelsea's planning department works to a noticeably stricter standard than most boroughs. Almost every house extension kensington project needs a full planning application. Permitted development, the route that lets modest extensions skip formal approval elsewhere, rarely applies across W8, W11, and the wider borough. That's not bureaucracy for its own sake. It reflects how much of Kensington's residential character depends on a consistent architectural language, stucco-fronted Victorian terraces, ornamental detailing, bay windows, that the council actively protects street by street. Why Permitted Development Falls Short Here The national rules are straightforward on paper. Single storey rear extensions can generally go up to ...

Three numbers tell you most of what you need to know about extending a house in Richmond upon Thames: 8 weeks, 98%, and dozens. Working with richmond conservation architects who deal with these figures daily reveals what each one actually means once you dig past the headline number. 8 Weeks Is the Council's Target, Not the Full Story Richmond Council aims for an 8 week decision on standard householder planning applications, measured from when a valid application is received, not from the day it's submitted. That distinction matters, since drawings can sit in a validation queue before the clock officially starts. For anything in a conservation area or with added complexity, that window stretches to around 13 weeks. Given how much of Richmond falls under conservation status, a realistic expectation for many applications here leans toward the longer end of that range rather than the shorter one, and building that expectation into a project timeline from day one avoids unnecessar...

  If you're at the stage of typing "two storey extension" into Google at 11pm with a cup of tea going cold beside you, you're probably somewhere between excited and slightly overwhelmed. That was me a few months back, trying to work out whether adding a full second floor to our side return was actually realistic. Along the way I spoke to a few firms, including Extension Architecture, a RIBA Chartered practice with 17 years of experience and over 1,800 planning approvals across London and Surrey, and pulled together the two storey extension facts that actually mattered once I understood them properly. Here's what I learned. It's Not Just "Double the Cost" of a Single Storey Job My first assumption was that a two storey extension would cost roughly twice what a single storey one would. That's not quite right. The roof and foundations get shared across both levels, so the cost per square metre often works out slightly better than you'd expect...

  Prefabricated extensions carry a reputation problem in the UK. Say the word "prefab" and many homeowners still picture the temporary post-war housing thrown up in the 1940s. That mental image stops people from considering what is now one of the fastest, most cost effective ways to add space to a home. The reality has moved on considerably. Around 15,000 prefab homes get built in the UK every year, and that figure is predicted to reach 50,000 within the coming decade. For anyone weighing up how to extend, this prefabricated extension guide tackles the five myths that most often stop homeowners from making a smart decision. Myth 1: "Prefab Means Cheap and Flimsy" This is the misconception that does the most damage, and it comes straight from the post-war era. Prefabricated homes were originally built as emergency solutions after World War Two, when Britain needed housing fast. An astonishing 500,000 prefab homes went up within five years of the plan. Those structu...

Most people planning an extension in Bromley start with a set of assumptions about what they can build, what it will cost, and how the planning process works. Some of those assumptions are right. Several are wrong in ways that cost time and money once the project starts. Here are the five misconceptions that come up most often, and what the reality actually looks like across BR1, BR2, and the wider borough. Homeowners searching for architects in Bromley benefit from clearing these up before spending anything on design. Myth 1: "My Extension Will Definitely Clear Under Permitted Development" This is the most common assumption, and it's wrong more often than homeowners expect in Bromley. Green Belt land covers substantial parts of the borough, particularly toward Orpington, Biggin Hill, Downe, and the rural fringes. Properties on Green Belt land lose most permitted development rights and require full planning applications even for modest extensions. Conservation areas incl...