Open-Plan Conversions Putney

GS Renovation creates open-plan living across Putney, opening up SW15's flats and the separate rooms of its bay-fronted Victorian and Edwardian terraces. From through-lounge knock-throughs to kitchen-diners spanning the rear closet wing and side return, our founder's 30+ years of structural work means the steel is engineered, the props are staged, and building control signs it off.

In Putney, a knock-through finished as one room typically costs £3,000 to £8,000 or more, including the steel beam (indicative London ranges, MyBuilder and Checkatrade, 2026). GS Renovation Ltd, a building contractor based in Potters Bar, does the work in Putney: the structural engineer we appoint designs the steel, we install it, and building control signs it off.

How the job runs

1. Free site survey at your Putney address, covering the walls, services and floor levels, and an itemised quote.
2. The engineer we appoint sizes the beam, and the work is registered with Wandsworth Council building control or an approved inspector. On a shared wall you serve the party wall notice as building owner; we supply the drawings.
3. Props in, opening cut, beam on padstones; then floors, heating and electrics are joined up.
4. Building control inspects the steel before it is covered. We finish the room, and the completion certificate follows.

Open-plan conversions for Putney terraces

Putney's terraced homes were built as a series of small, separate rooms, so opening them up nearly always means removing a load-bearing spine wall or the wall into the rear closet wing. A classic Putney knock-through joins the bay-fronted front room to the middle room, while a kitchen-diner ties the closet wing and side return into one bright space. Each removal is designed around a steel beam sized by a structural engineer for the loads above.

Not every wall needs a beam, though. Some later partitions in these homes are non-structural, so we can take them out cleanly, but we never assume; the engineer confirms which is which first. For a broken-plan feel that keeps some separation, we fit Crittall-style glazed dividers or a slim structural screen, giving you flow and light without turning the whole ground floor into a single echoing box.

Housing in Putney

Putney has around 20,990 homes on the Council Tax list: 54% post-war, 8% interwar and 36% predate 1919, with 75% flats and 25% houses. Most homes here are flats, and opening up a flat in Putney changes its fire escape route, which building control checks.

Open-plan layouts in a listed Putney building

Opening up rooms is an internal job, and outside a listed building it is a matter for building regulations and, in a flat, the lease. The exception is a listed building. Wandsworth has around 500 listed buildings, and works to alter or extend one that affect its special character, including alterations to the interior, require listed building consent. The wall between two principal rooms is often part of the plan form that gives a listed Putney house its character, so the consent question comes before the engineer's design is finalised. Check the national list entry for the address before any layout is drawn.

In a listed house divided into flats, the listing covers the whole building, inside every flat. An open-plan scheme in one flat can therefore need listed building consent even though the lease is yours alone, and the freeholder will want to see the consent as well as the calculations. The list entry describes some features, but protection is not limited to what it mentions, so treat a cornice, a chimneypiece or a run of panelled doors as protected until the conservation officer says otherwise. Keeping short nibs of wall and a downstand beam on the old line, so the original plan can still be read, is one approach worth discussing with the officer before the steel is sized.

Steel, propping and sign-off in SW15

The heart of a Putney open-plan conversion is the beam. Once the engineer has specified it, we prop the floors above, remove the masonry in controlled stages, and set the RSJ onto padstones at each end so the load transfers safely into the remaining structure. We pin the beam tight, then box or expose it to suit the look you want, whether that is a clean plastered ceiling line or an honest steel feature.

The work is controlled under the Building Regulations, so Wandsworth Council's building control inspects the beam and padstones and issues the completion certificate; open-plan work inside your home does not need planning permission. Where the spine or rear wall meets the party wall shared with the neighbouring terrace, you serve the necessary Party Wall Act notice first. One team manages the engineer, the build and the sign-off.

• Flush beam detailing where a downstand would look wrong
• Knock-throughs between front and rear reception rooms
• Beam depth checked against existing ceiling heights

VOA Council Tax stock of properties, March 2025, for Putney Embankment & Lower Common, Putney Town & Wandsworth Park, Putney West and East Putney. Counts rounded by the VOA.

If you are weighing up options for your Putney property, it is worth reading home renovation in Putney, open-plan conversion across Wandsworth, builders in London, garage conversions, open-plan conversion across London and Knock-Through Guide.

Trusted Open-Plan Conversions in Putney

For open-plan conversions in Putney, GS Renovation keeps everything under one accountable team: we appoint the engineer who designs the steelwork, give you the drawings for any party wall notice you serve on the neighbouring terrace, carry out safe propping and staged demolition, and book Wandsworth Council's building control sign-off. We work tidily in your occupied SW15 home, protect floors and finishes, and leave you a signed-off, genuinely open space, backed by our founder's 30+ years of structural experience.

Checked by Abdelaaziz Saaid, founder and director of GS Renovation Ltd (Companies House no. 14611254). Structural design is by the consulting engineer appointed to your project.