Extensions and loft conversions in Reigate and Banstead
Reigate and Banstead is a Surrey borough of several distinct towns. Around the Reigate and Redhill centres the Victorian and Edwardian terraces and villas take the classic moves: a rear or side-return extension to create a kitchen-diner, and a rear dormer to add a bedroom and bathroom in the roof. In Nork, Banstead, Earlswood and Merstham the 1930s semi dominates, and the typical project is a two-storey side extension over a garage, a 4–6 m rear extension, a hip-to-gable loft with a rear dormer, or a garden room. On Reigate Hill and in Kingswood and Chipstead the large detached houses on wooded plots more often want a two-storey rear extension, a wraparound or a substantial garden studio, usually in the Green Belt. Horley’s post-war and new-build houses take single-storey rear extensions and garage conversions, with Gatwick’s noise contours shaping the specification of any new bedroom. Flats have no householder permitted development (PD) rights at all.
Where the house is outside a conservation area and any Article 4 area, much of this is PD and we secure a Lawful Development Certificate (LDC) as proof. Because most of the borough beyond the towns is Green Belt, and the North Downs sit within the Surrey Hills National Landscape, a planning application designed to the council’s guidance is the norm on the edges, and we check the constraints map for every address before recommending a route. We are based in London and work across Reigate and Banstead as a matter of course, alongside the neighbouring boroughs of Croydon and Sutton.
Planning constraints in Reigate and Banstead
- Green Belt across most of the borough outside Reigate, Redhill, Banstead and Horley, where extensions must stay proportionate to the original house.
- Surrey Hills National Landscape on the North Downs above Reigate, including Reigate Hill and Colley Hill, where landscape impact carries great weight.
- Conservation areas including Reigate town centre, Banstead, Chipstead, Kingswood and Merstham, where roof extensions lose PD rights.
- Gatwick noise contours over parts of Horley and Salfords, affecting the specification of new bedrooms.
- Flood risk along the River Mole through Horley and Salfords and the Redhill Brook through Redhill and Earlswood.
- Listed buildings in Reigate, Banstead, Chipstead, Merstham and the villages.
If you are unsure which of these touch your plot, the council’s constraints map is the place to start, or ask us to check as part of your quote.
What Reigate and Banstead planning officers look for
Officers assess householder applications against the Core Strategy, the Development Management Plan and the council’s guidance on residential extensions. On the semis they look for side extensions set back from the front elevation and down from the ridge, with a gap kept to the boundary; rear extensions that clear the 45-degree line to the neighbour’s nearest habitable window; and dormers that are subordinate, set back from the eaves and clad in matching tile. On Reigate Hill and in Kingswood and Chipstead, plot coverage, protected trees and the spacious character of the road carry more weight.
Green Belt is a real theme here. National policy allows an extension to a house in the Green Belt only where it does not result in disproportionate additions over and above the size of the original dwelling, meaning the house as first built or as it stood in 1948. Councils usually read this as a percentage of the original floorspace or volume, counting every extension since, so a house that has already been extended once may have little headroom left. Outbuildings face a stricter test: a garden room or annexe is judged on whether it preserves the openness of the Green Belt, not just on proportion, so size, siting and use all matter. Inside the Surrey Hills National Landscape, visibility from the downs and the choice of materials are tested on top of this. We check the original footprint and the council’s policy wording before drawing anything.
Terracing effects from side extensions, full-width box dormers and disproportionate Green Belt additions are the standard refusals. Reigate and Banstead offers paid pre-application advice, which we recommend for Green Belt, Surrey Hills and conservation area sites. Council fees from April 2025 are £528 for a householder application and £264 for a proposed-use LDC; verify before applying.
Our services in Reigate and Banstead
- Planning documentation
- House extensions – side, rear and two-storey extensions on 1930s semis and detached houses
- Loft conversions – hip-to-gable and rear dormer lofts
- Permitted development and LDCs
- Outbuildings and garden rooms – including the Green Belt openness test
- Feasibility studies and pre-application advice
- Building Regulations drawings
Example projects nearby
- Two-storey extension in Ealing – two-storey rear extension and side infill on a 1930s semi, the same house type as Nork, Banstead and Earlswood
- Loft conversion in Hackney – rear dormer on a Victorian terrace under permitted development, the Redhill and Reigate centre house type
- Garden office in Bromley – 20 m² garden office within 2 m of the boundaries under permitted development
Guides
Read Permitted development rights in London, Do I need planning permission for a rear extension? and Extending or converting a loft in a conservation area.
Ready to start in Reigate and Banstead? Get an instant estimate: your indicative fee on screen and by email in two minutes, then a written fixed-fee quote within 24 hours.
