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Extension builders in Enfield

The 10 extension builders from Google's results for Enfield, ranked on Google rating, online presence and other factors. Updated 10 September 2026.

Single storey, per m²
£2,100 – £2,900shell to finished
Typical single storey
£45,500 – £62,500around 20 m²
Double storey
£62,500 – £102,500around 30 m² over two floors
Enfield vs UK
+14%well above the UK median

Number 1: Detailed Planning

4.9(96)out of 5, from 96 reviewson GoogleLondon

Detailed Planning assists property owners in Enfield with residential house extensions, including rear, side and roof additions. The firm offers design and planning support aligned with local council guidelines and property character.

020 8150 0494 Detailed Planning Ltd, Greenside House, 50 Station Rd, London N22 7DE

Number 2: Alstruct Ltd

5.0(9)out of 5, from 9 reviewson GoogleLondon

Alstruct Ltd provides house extensions, loft conversions and basement conversions for homeowners in Chiswick and West London. Its services also include groundworks, full property renovations and garden landscaping.

020 8080 8240 15B Raven Rd, London E18 1HB

Number 3: House Extensions in Enfield

4.9(44)out of 5, from 44 reviewson GoogleLondon

House Extensions in Enfield builds residential property extensions across the London area.

020 7971 1318 1ST FLOOR, Gallery Court, 28 Arcadia Ave, London N3 2FG

Number 4: LCCL Construction

4.9(29)out of 5, from 29 reviewson GooglePopes Dr, London

LCCL Construction is a design and build company converting lofts, extending houses and renovating homes across East London. It works in areas such as Hackney, Walthamstow, Leyton and Bow, where much of the housing is Victorian terraces, and provides architectural design as part of its service.

020 8037 7332 3rd Floor, Hathaway House, Popes Dr, London N3 1QF

Number 5: House Extensions Design & Build 🥇 in Enfield & across ...

4.8(99)out of 5, from 99 reviewson GoogleEnfield

Serving Enfield, this trade business supplies extension building services alongside window and door fitting.

020 8281 8282

Number 6: Jenkin Builders

4.6(33)out of 5, from 33 reviewson GoogleLondon

Jenkin Builders carries out house extension projects across Enfield, North London and the South East. Providing an end-to-end service from initial design to final finishing touches, the company works on residential properties in areas including Winchmore Hill and Cuffley.

07860 403973 39 The Spinney, London N21 1LL

Number 7: Bright Builders Ltd

4.4(7)out of 5, from 7 reviewson GoogleLondon

Bright Builders Ltd installs traditional and modern bathrooms across North London, including Enfield, Walthamstow, Barnet, Camden, and Hackney. The business also provides kitchen fitting and house extension construction.

07988 214637 49 Pembroke Rd, London N13 5NR

Number 8: Simply Extend

4.5(86)out of 5, from 86 reviewson GoogleEnfield

Simply Extend builds house and kitchen extensions across East and South London, covering areas such as Croydon, Lambeth and Wandsworth. The business manages residential builds through assigned project managers, handling groundworks, brickwork construction, plastering and internal fittings.

0800 917 7571

Number 9: Lynch Build

3.0(2)out of 5, from 2 reviewson GoogleEnfield

Lynch Build constructs house extensions, loft conversions, and new kitchen installations across Enfield and surrounding areas. Services also include full house refurbishments for domestic properties.

01992 717370 106 Beaconsfield Rd, Enfield EN3 6AX

Number 10: Find An Architect

No Google reviews yetEnfield

Find An Architect features architectural designs for residential house extensions across Enfield. Featured work includes two-storey extension projects, full basement conversions and loft alterations within local conservation areas.

What extension builders charge in Enfield

In Enfield, single storey, per m² typically costs £2,100 – £2,900. Labour in Greater London runs 14% above the UK median, which accounts for most of the difference from the same job elsewhere.

How to choose between them

  • Check the registration yourself. Trade body memberships are public, and each body's own register confirms them in a minute.
  • Get three quotes on the same specification. Written down, split into labour, materials and anything structural. Most people compare a total against a total and end up choosing between two different jobs.
  • Ask what is not included. Making good, waste removal, scaffolding and VAT are the four that turn a cheap quote into an average one.
  • Never pay a large deposit up front. Materials in advance is normal. Half the total before anyone turns up is not.

How this list is ordered

These are the firms from Google's results for "house extensions enfield". They are ranked on Google rating, online presence and other factors.

Work out the budget first

The figures above are Enfield ranges. These explain what drives them, so you can read a quote properly.

Extension builders in Enfield: common questions

How far can I extend without planning permission?

Under permitted development, three metres for a terrace or semi and four for a detached, doubled to six and eight under the prior approval process. Height, materials and how much garden you cover all carry separate limits, and none of it applies in a conservation area.

Do I need a party wall agreement?

If you are excavating within three metres of a neighbour's foundations or building on the boundary, yes. You must serve notice two months before work starts. Skipping it is the most common reason extension projects stall.