Extension Architecture

Most Victorian and Edwardian terraces in Haringey have a hidden feature at the back. A narrow rear projection, the "outrigger", that originally held the scullery or the bathroom, sticking out into the garden. That outrigger is the key to the best loft conversion these houses can have. Join a dormer over the main roof with one over the outrigger, and you get an L-shaped loft that delivers two proper rooms, not one. This overview from Architects Haringey is a good start, and here's why the L-shaped dormer suits the borough so well. What the outrigger gives you Walk around the back of a terrace in Crouch End, Muswell Hill or Wood Green and you'll see the shape clearly. The main body of the house, and then a lower wing projecting back, forming an L in plan. That rear wing is the outrigger, and crucially it has its own roof. An ordinary rear dormer only captures the space above the main roof. An L-shaped dormer captures both, wrapping around the corner to take in the ou...

Most homeowners in Brent think about extending out the back. But on the borough's 1930s semis, the biggest opportunity is often sitting right beside the house. That gap down the side, sometimes holding a tired garage, sometimes just a passage to the back, is prime building land. Used well, it can add a room downstairs and a bedroom upstairs in one go. This overview from Architect Brent is a good start, and here's why the side deserves your attention. The Wembley semi and its side gap Brent's housing tells a clear story by area. Edwardian villas in Queen's Park and Mapesbury, Victorian terraces in Kilburn and Harlesden, and, dominating Wembley and the Metro-land suburbs of Kingsbury and Kenton, the classic 1930s semi-detached. Those interwar semis were built with space between the pairs, and many came with a side garage or a driveway running down the flank. That garage was sized for a 1930s car and is often useless for a modern one. Which makes it the obvious place to ...

Earls Court has a split personality that catches homeowners out. From the street, it looks like a district of grand houses. Tall stucco-fronted terraces march around beautiful garden squares like Earls Court Square, Nevern Square and Philbeach Gardens. But step inside most of them and you find something different: flats. The great majority of these houses were divided into mansion and conversion flats long ago. This overview from Architects in Earls Court is a good primer, and the house-or-flat question is the one that shapes everything here. The flat-heavy reality Earls Court is unusually flat-heavy, even by central London standards. The grand mid-Victorian terraces around the garden squares were built as single houses, then subdivided during the twentieth century into apartments and mansion-block-style flats. Add the purpose-built red-brick mansion blocks on streets like Nevern Square and Old Brompton Road, and the result is a district where most homes are leasehold flats rather th...

  Think of permitted development rights as a hidden asset attached to your house. They let you add serious space without ever applying for planning permission, and most homeowners have no idea how much that freedom is actually worth in pounds. Understanding your permitted development rights before you plan anything can save months of waiting, hundreds in fees, and unlock tens of thousands in value. What they actually let you build Permitted development rights are a national grant of planning permission from central government, written into the Town and Country Planning Order 2015. They let you carry out defined works on a house without asking your local council. The core allowances in 2026 are generous. A single-storey rear extension of 3 metres on a terrace or semi, or 4 metres on a detached house. A loft conversion of up to 40 cubic metres on a terrace or 50 cubic metres on a semi or detached. And outbuildings covering up to half your garden. Each of these adds real, usable spa...

The gap between the cheapest and most expensive loft conversion is enormous, and it isn't random. Get a grip on what drives the number and you can budget with real confidence rather than guessing. This is a plain breakdown of the loft conversion cost you should expect in 2026, type by type, and where every pound tends to go. The type of loft decides most of the cost Before anything else, understand this: the type of conversion is the single biggest lever on price, often acting as a two to three times multiplier between the cheapest and dearest options on the same house. Everything else, finish, en-suite, region, moves the number within a band that your roof type has already set. So the honest starting point isn't "how much does a loft conversion cost", it's "which type does my roof allow". Once you know that, the budget falls into a fairly predictable range. Velux, the cheapest route A Velux or rooflight conversion is the least expensive at roughly £22...

Drive through Hornchurch or Upminster and you'll see the same roofline over and over: the 1930s semi with its roof sloping gently inward on all four sides. That shape, the hipped roof, is quietly one of the best loft conversion opportunities in outer London, and Havering has more of it than almost anywhere. Working with Architects Havering homeowners trust, that wasted roof space becomes a proper extra bedroom. Here's how it works. Why the hipped roof matters The 1930s hipped roof looks neat from the street, but it has a quirk that limits the loft inside. Because the roof slopes inward on the side as well as front and back, it cuts off the corner of the loft where you'd otherwise have head height. That's the problem the hip-to-gable conversion solves. It rebuilds the sloping side into a vertical gable wall, squaring off the roof and reclaiming the volume the slope was wasting. On a Havering semi it's often the difference between an unusable loft and a full double...