Extension Architecture

  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...

Kitchen extension research online is full of half-truths repeated so often they sound like fact. Below are the claims that come up most in first meetings, checked against what actually happens on real kitchen extension projects, including four completed builds across London and Surrey. Myth: "A kitchen extension always needs full planning permission" Reality: Many single storey rear kitchen extensions fall under permitted development rights, provided they stay within volume and boundary limits set by national planning policy. Full planning is only triggered once the scheme exceeds those thresholds, or the property sits in a conservation area or has removed permitted development rights through an Article 4 Direction. The right first step is always a site specific check, not an assumption either way. Myth: "Bigger always means better value" Reality: Value uplift depends more on how the space connects to the rest of the house than on raw square footage. This played...

Most London loft conversions start with the same conversation. Family runs out of space, hears about the loft option, gets a rough quote, appoints a contractor, discovers halfway through that critical elements weren't discussed at the start. The observations below capture what actually matters at the earliest stages of a loft conversion project, drawn from patterns across hundreds of completed London projects. Read these before your first architect meeting and your questions at that meeting will be significantly better. A competent loft conversion service walks through each of these considerations at feasibility stage. Practices that skip them produce the compromised outcomes families regret. 1. Ridge Height Above 2.4 Metres Is the First Test Measure from the existing ceiling joists to the underside of the ridge. Above 2.4 metres works. Below 2.2 metres usually doesn't. Building Regulations Part K minimums determine viability before design ambition matters. 2. Roof Pitch Abov...

1,800. That is the number of planning applications Extension Architecture has successfully secured across 16 years of residential and commercial work in London and Surrey. A single number of that scale tells you more about how a residential practice actually operates than any portfolio photograph can. It reflects accumulated borough relationships, case officer familiarity, and pattern recognition across thousands of design decisions. For homeowners searching among the many architects london offers, distinguishing between practices that will deliver against ambitious briefs and practices that will produce compromised outcomes requires reading the data behind the marketing rather than the marketing itself. The analysis below unpacks the specific numbers that actually predict project outcomes. The Applications Volume Number That Predicts Everything Volume of planning applications processed correlates strongly with borough-specific expertise. A practice submitting hundreds of application...