GS Renovation builds extensions across Clerkenwell, working with the warehouse conversions and new-build riverside apartments that define this EC1 corner of Islington. Over 30-plus years we have learned that space here is won cleverly rather than easily, whether that means a rear addition to a period workshop or a considered reconfiguration within a leasehold shell.
Extension options for Clerkenwell EC1 properties
Clerkenwell is not a borough of generous rear gardens, so extensions here take different forms to the classic side-return you see further into Islington. Where a converted workshop retains a yard or lightwell, a single-storey rear addition can transform a cramped ground floor. We handle the groundworks, foundations, steel beams and roof works, then the full fit-out, all sequenced so you keep as much of the building usable as possible.
Whether your project is permitted development or needs a full planning application to Islington Council depends entirely on the property. Many EC1 flats and conversions have permitted development rights removed or restricted by leasehold terms and local planning designations, so a change that would be automatic on a suburban house is not here. We assess your title and the council's position before committing to a route.
Party walls and leasehold rules in Clerkenwell
Building against or near a shared structure in Clerkenwell almost always brings the Party Wall Act into play. The dense EC1 street pattern means your extension or new opening frequently touches a wall held in common with the unit next door, so you serve the right notices and agree the schedule before excavation begins. Getting this settled early keeps neighbours onside and stops the programme stalling.
For flats within a warehouse conversion or a new-build block, structural change is limited by the lease. You will need the freeholder's licence to alter, and the managing agent will set conditions on working hours, access and protecting common parts. We coordinate that paperwork alongside the building control applications, and we detail the acoustic and fire separation that regulations demand between one Islington home and the next.
- First fix and second fix plumbing and electrics throughout
- Flat and pitched roofs with rooflights or lanterns
- Roof works and structural alterations at roof level
- Trial holes to set foundation depth near drains and trees
- Steel goalpost frames where the rear wall opens up
The GS Renovation Difference in Clerkenwell
Extensions in Clerkenwell reward a builder who understands leasehold reality and tight EC1 plots, not just bricks and mortar. GS Renovation manages the planning or permitted development question, the freeholder's licence and the full build under one roof, backed by 30+ years across Islington and the surrounding Angel and Old Street streets.
- Insulation and thermal detailing to current regulations
- Materials priced at options, so you choose the finish
- Scaffolding and site set-up planned for tight London plots
- Permitted development checked before you pay for a planning application
- Clean, tidy and reliable tradespeople
- One point of contact on the phone, not a call centre