Trusted Builders in Enfield
Quality house extensions, loft conversions and full renovations for Enfield's Edwardian and Victorian family homes across EN1 and EN2.
Reliable Construction Services in Enfield, EN1 & EN2
Enfield sits at the northern edge of London, a leafy suburban borough where spacious Edwardian and Victorian family homes line tree-lined avenues alongside well-built interwar semis and detached properties. With generous gardens, wide plots and strong community roots, Enfield offers exceptional scope for extensions and conversions that add real living space and lasting value. Alstruct Ltd delivers dependable, quality-driven construction services throughout EN1, EN2 and the wider Enfield borough, bringing professional project management and meticulous craftsmanship to every build.
The housing stock in Enfield is remarkably varied. Edwardian terraces and semis around Enfield Town and Bush Hill Park feature bay windows, decorative brickwork and generous rear gardens ideal for single and double-storey extensions. Interwar semis in Grange Park and Winchmore Hill offer excellent loft conversion potential with their pitched rooflines and solid construction. Larger detached properties along The Ridgeway and Hadley Wood present opportunities for substantial side returns, wraparound extensions and complete interior renovations. Alstruct understands each property type and tailors every project to the home's original character.
Navigating planning requirements in Enfield requires local knowledge. Parts of the borough fall within the Enfield Town Conservation Area, the Chase Side Conservation Area and the Hadley Wood Conservation Area, where additional restrictions apply. Alstruct's team has extensive experience working with the London Borough of Enfield planning department, preparing applications that satisfy conservation officers and building control. From permitted development rear extensions to full planning applications for larger schemes, we guide you through every step with clarity and confidence.
Why Choose Alstruct in Enfield?
- Specialists in Edwardian, Victorian and interwar home extensions
- Proven experience with Enfield Council planning and conservation areas
- CHAS Elite, Constructionline Gold & FMB accredited
- Free site survey and detailed, fixed-price quotation
- Dedicated project manager from start to handover
- In-house design team for architectural drawings and planning submissions
- Quality materials and reliable, skilled tradespeople
- Strong track record of projects across North London
Frequently Asked Questions — Enfield
Do I need planning permission for a rear extension in Enfield?
Most single-storey rear extensions in Enfield can be built under Permitted Development rights, subject to size limits — typically up to 3m for terraced and semi-detached homes, or up to 6m under the Neighbour Consultation Scheme. However, properties in the Enfield Town or Chase Side Conservation Areas may have restricted PD rights. Alstruct will check your property's planning status and advise on the best route forward before any work begins.
How much does a loft conversion cost in Enfield?
Loft conversions on Edwardian and Victorian terraces in Enfield typically cost between £48,000 and £78,000 depending on the type of conversion and specification. A dormer conversion adding one bedroom with an en-suite is the most popular option, usually ranging from £52,000 to £70,000. Alstruct provides fixed-price quotations after a thorough survey so there are no surprises.
Can Alstruct handle extensions on interwar semi-detached homes?
Absolutely. Enfield's interwar semis are among the most common properties we work on. Side return extensions, rear extensions and loft conversions are all well-suited to these solidly built homes. We ensure new work integrates seamlessly with original features such as bay windows, picture rails and period fireplaces.
How long does a typical house extension take in Enfield?
A single-storey rear extension in Enfield usually takes 12 to 16 weeks from groundworks to completion. Double-storey extensions typically require 18 to 24 weeks. Timescales depend on the project scope and specification, but Alstruct provides a clear programme at the outset and keeps you informed throughout with regular progress updates.
Construction Services in Enfield
Extensions in Enfield
Single and double-storey rear, side and wraparound extensions designed to complement Enfield's Edwardian terraces, interwar semis and detached family homes.
Learn more →Loft Conversions in Enfield
Dormer, hip-to-gable and mansard conversions adding valuable bedrooms and en-suites to Enfield's period and interwar properties with their generous rooflines.
Learn more →Renovations in Enfield
Complete interior refurbishments for Enfield homes, from kitchen and bathroom upgrades to full whole-house renovations that modernise while preserving character.
Learn more →Basement Conversions in Enfield
Basement excavation and conversion creating additional living space beneath Enfield's larger detached and semi-detached properties along premium streets.
Learn more →Groundworks in Enfield
Professional foundations, drainage and underpinning services supporting extensions and new builds across Enfield's varied ground conditions.
Learn more →Landscaping in Enfield
Driveways, patios, garden walls and outdoor living areas making the most of Enfield's generous gardens and outdoor spaces.
Learn more →House and kitchen extensions in Enfield
Enfield Town, Bush Hill Park and Grange Park are mainly 1930s semis and detached houses, with Victorian and Edwardian terraces around Enfield Town and Lancaster Road. House extensions in Enfield are usually a side and rear combination on the semis, creating a wide kitchen-family room; two-storey side extensions add a bedroom and bathroom above.
As a guide, a well-built single-storey rear or side-return extension in Enfield costs around £2,500–£4,000 per m² including structure, glazing and finishes, so a typical 25–30 m² kitchen extension lands between £75,000 and £120,000. Our house extension cost guide explains what moves the price. Enfield Town, Bush Hill Park and Forty Hill are conservation areas; elsewhere Enfield Council's permitted development rules cover most single-storey extensions. We confirm permitted development rights at the first visit and handle any application to Enfield Council through our in-house design team.
Planning a kitchen extension? See our kitchen extensions page for layouts, glazing and costs.
Loft conversions in Enfield
Hip-to-gable with a rear dormer is the standard Enfield loft and typically gives a master bedroom and en-suite; the terraces take a rear dormer.
In London a Velux conversion costs £25,000–£45,000, a dormer loft with a bedroom and en-suite £45,000–£75,000 and a mansard £60,000–£100,000+; our loft conversion cost guide sets out what is included. We survey the roof structure, head height and stair position before we quote a Enfield loft, so the figure reflects the actual roof rather than an assumption.
Renovations and refurbishment in Enfield
Enfield renovations are typically full modernisations of interwar homes: kitchens, bathrooms, heating, rewiring and layout changes. Typical Enfield refurbishments include structural openings with steel beams, new kitchens and bathrooms, rewiring, heating and period repairs such as sash windows, cornices and floors. Our Victorian terrace renovation cost guide gives realistic budgets, and every Enfield project runs on a JCT contract with a written specification and our 10-year workmanship warranty.
Planning approvals in Enfield
Enfield Council approved 83.0% of householder planning applications decided between September 2025 and August 2026, against a London average of 85.8%; a typical decision took about 7.1 weeks from validation. Loft conversions that needed planning permission were approved 73.2% of the time and extensions 81.3%.
See how every London borough compares, including loft and extension approval rates, in our 2026 London planning approvals study.
Alstruct projects near Enfield
Evelyn Road, Cockfosters EN4
Ground and first-floor extensions, new terrace, kitchen, bathrooms and full M&E upgrade.
About 3 miles from Enfield · View project →Whitehall Park, Archway N19
Full Victorian terrace renovation and rear extension with triple glazing and aluminium sliding doors.
About 6.5 miles from Enfield · View project →Dunstan Road, Golders Green NW11
Rear extension, two-storey side extension and full renovation of a 1930s semi-detached house.
About 7.5 miles from Enfield · View project →Our nearest recent sites to Enfield are in EN4 and N3 (about 3 miles away). We work across every London borough from our office in South Woodford, E18, and regularly take on projects further out. See all completed projects →
Common questions about building in Enfield
Do Alstruct cover Enfield?
Yes. Alstruct takes on extensions, renovations and loft conversions in Enfield and the surrounding neighbourhoods, working across every London borough from our office in South Woodford, E18. We visit, measure and provide a written, fixed-price quote.
How much does a house extension cost in Enfield?
As a guide, our published London figures at mid to high specification are £80,000–£160,000 for a single-storey rear extension, £65,000–£130,000 for a side return, £170,000–£320,000 for a double-storey and £190,000–£380,000 for a wrap-around. 1930s semis and edwardian houses are the most common build type in the area, and our quote will reflect the specific condition and layout of the property. Our house extension cost guide sets out what those figures include.
Do I need planning permission for an extension in Enfield?
Many single-storey rear extensions in Enfield fall under Permitted Development rights and don't require planning permission, but larger or two-storey extensions usually need approval from Enfield Council. We assess this during the free consultation and prepare any application required.
What types of property do you work on in Enfield?
1930s semis and Edwardian houses are the most common homes in Enfield. We survey the structure, check the planning and building regulations position and price from what we find, so the quote reflects your property rather than an assumption. Our completed projects show the Victorian and 1930s houses we have extended and refurbished across London.
How quickly can Alstruct start a project in Enfield?
Once design and approvals are signed off, we typically start on site in Enfield within 6–12 weeks depending on programme availability. Design, planning and building regulations typically take 3–6 months before that. For urgent projects, get in touch on 020 8080 8240 to discuss timing.
Are you accredited to work in Enfield?
Yes. Alstruct holds CHAS Elite, Constructionline Gold and Federation of Master Builders (FMB) accreditation, with £10M public liability insurance, JCT contracts as standard, and a 10-year workmanship warranty on every project — including all work in Enfield.
Nearby areas we cover
Alstruct works across every London borough. Here are areas close to Enfield with dedicated local pages: