Extension Architecture

Two roof shapes. Two very different results. Choosing between a dormer loft conversion and a mansard comes down to what the existing roof can support and how much space is actually needed. Both add genuine value to a property. The right choice depends on the specific roof, not a general preference for one over the other. What Is A Dormer Loft Conversion? A dormer extends the roof outward, usually at the rear, creating a box shaped addition with vertical walls and a flat or pitched roof of its own. It adds genuine headroom without a complete roofline change. Most dormer conversions qualify as Permitted Development, provided they stay within standard volume limits. That makes them one of the more straightforward loft options in terms of planning. A rear dormer tends to face fewer restrictions than one facing the street, since it stays out of view from the front of the property. What Is A Mansard Loft Conversion? A mansard alters the entire roof slope, typically to a steep angle close t...

  Richmond upon Thames holds a record that most homeowners only discover when they start planning an extension. Eighty five conservation areas. More than any other London borough. And unlike some boroughs where conservation areas are concentrated in one or two historic pockets, Richmond's designations spread across Richmond town itself, Twickenham, Kew, Barnes, East Sheen, Petersham, and Ham. That coverage means a significant proportion of TW9, TW10, and TW1 properties face planning considerations that simply dont apply in most of London. Extension Architecture has completed 47 projects across Richmond with a 98% planning approval rate. If youre looking for a Richmond architect who has navigated this specific planning environment across 17 years of practice, that track record across the borough is what genuine local expertise looks like. The 28 Rowanfield Gardens Project: What a Richmond Extension Actually Delivers Our gallery includes completed projects at 28 Rowanfield Gardens ...

Online guides quote a single number. Real projects rarely land on it exactly. Understanding how much does an extension cost for a single storey scheme means looking past the average to what actually drives the final figure. Most homeowners start with a number in mind before design work even begins. Knowing what actually shapes that number helps set a budget that holds. What's The Typical Price Range? A single storey rear extension generally costs £1,500 to £2,500 per square metre. Design fees, structural work, and finishing all sit within that range for most standard projects. This figure covers the complete project when quoted honestly, not just the visible construction work most people picture when they think about an extension. A modest 20 to 30 square metre extension usually lands between £45,000 and £75,000 all in. Larger or more elaborate schemes push well beyond that. Location within London affects this range too. Labour and material costs vary noticeably between boroughs,...

  Watching a real project beats reading a checklist. An architects in Richmond project, filmed from first survey through to completion, shows exactly what a checklist leaves out. Most guides describe the process in theory. A video shows what actually happens on site, week by week, including the parts that rarely make it into a brochure. What Does The Video Actually Show? It starts with the site survey. Not a design sketch. An actual visit to measure the property and check its condition. From there it moves through concept drawings. Then working drawings. Then the build itself, scaffolding and all. Most homeowners never see this sequence. They see before and after photos. The gap between those two images is where most of the real decisions happen. That gap is exactly what this kind of video fills in, showing the reasoning behind each stage rather than just the finished result. Why Does The Survey Stage Matter So Much? Richmond has 85 conservation areas. That's more than any other ...

  Short answer: Coombe architects typically manage everything from Green Belt feasibility checks through to Building Regulations sign off, and a loft conversion here generally costs between £50,000 and £90,000 depending on type and specification. Extension Architecture has completed 80+ projects across Coombe, holding a 98% planning approval rate throughout. What Makes Coombe Different When Planning A Loft Conversion? Green belt fringes touch parts of Coombe , which means some properties keep standard Permitted Development rights while others need a full planning application for the same conversion type. Mature gardens across Coombe often carry Tree Preservation Orders too, which can affect a loft conversion indirectly if scaffolding or access routes come close to a protected tree. None of this stops a loft conversion. It simply means checking the specific property's status matters more here than in a typical suburb. Two neighbouring properties can end up with entirely diff...

Short answer: extension cost and loft conversion cost sit in similar ranges for smaller projects, but which one makes sense depends more on the property's layout and garden space than on price alone. Homeowners weighing up the two often assume one is straightforwardly cheaper, when in reality the right choice usually comes down to what the property can physically support. How Do Extension And Loft Conversion Costs Compare? Both typically fall between £45,000 and £90,000 for a standard project , though the final figure depends heavily on size, specification, and site access. A single storey rear extension usually costs £1,500 to £2,500 per square metre. A loft conversion generally costs £1,500 to £3,000 per square metre, with the higher end reflecting more complex roof alterations like dormers or mansards. Neither option is consistently cheaper. The right comparison depends on what each square metre actually delivers for the specific property. A loft conversion that adds a much n...