Premium Builders in Wandsworth
Bespoke luxury extensions, renovations and conversions for Wandsworth's distinguished Victorian properties, SW18.
Bespoke Construction Excellence in Wandsworth, SW18
Wandsworth has established itself as one of South London's most dynamic and desirable boroughs, where an abundance of handsome Victorian terraces and period conversions attract discerning homeowners seeking exceptional quality of life. The area's compelling combination of Wandsworth Common's open green spaces, thriving local amenities, and convenient Overground connectivity from Wandsworth Town station makes it a premium address that commands significant property values. Alstruct Ltd delivers construction services commensurate with this standing, offering a level of craftsmanship and attention to detail that Wandsworth homeowners expect and deserve.
The streets radiating from Wandsworth Common — from Heathfield Road to Spencer Park — showcase some of London's finest Victorian architecture, with generous proportions and characterful period details that provide an outstanding canvas for luxury transformation. Our team excels at reimagining these properties, whether through a meticulously crafted rear extension that opens onto landscaped gardens, a premium loft conversion that creates a spectacular master retreat, or a comprehensive whole-house renovation that elevates every room to the highest contemporary standard whilst respecting the home's heritage.
With the ongoing regeneration of Wandsworth's riverside quarter and the borough's consistently low council tax rates attracting affluent families, the demand for premium construction services has never been greater. Alstruct responds to this demand with an unwavering commitment to excellence, combining in-house architectural expertise with master craftsmen who share our obsession with perfection in every detail.
Why Choose Alstruct in Wandsworth?
- Published projects on Victorian terraces and 1930s semi-detached houses
- Expert navigation of Wandsworth Council planning processes and conservation areas
- CHAS Elite, Constructionline Gold & FMB certified — nationally recognised credentials
- In-house architectural design creating bespoke solutions for SW18 properties
- Luxury-grade materials and finishes handpicked for each project
- Dedicated project manager providing seamless communication throughout
- Transparent pricing with detailed breakdowns and no hidden contingencies
- Published case studies with scope, programme and budget
Frequently Asked Questions — Wandsworth
What is the cost of a premium extension in Wandsworth?
Premium extensions in Wandsworth typically cost £3,200-£4,500 per square metre at high specification, or £2,500-£3,200 at mid-range. A bespoke single-storey rear extension typically costs £80,000-£160,000, while a high-end loft conversion ranges from £55,000-£100,000. Alstruct delivers detailed, transparent quotations for every Wandsworth project.
Does Wandsworth Council have specific planning requirements for extensions?
Wandsworth Council maintains detailed planning policies, with particular attention to conservation areas such as Wandsworth Common and the Old York Road area. Alstruct's in-house design team prepares the application to Wandsworth's requirements, aiming for full approval while maximising the potential of your property.
Can Alstruct convert Victorian terraces in Wandsworth into open-plan living?
Absolutely. Wandsworth's Victorian terraces are ideal candidates for structural reconfiguration. We specialise in removing internal walls with precision steelwork to create expansive, light-filled open-plan living spaces. Combined with a bespoke rear extension, this transformation can redefine your home entirely.
What certifications does Alstruct hold for Wandsworth projects?
Alstruct holds CHAS Elite, Constructionline Gold, and Federation of Master Builders (FMB) certifications. These independently verified accreditations provide Wandsworth homeowners with complete confidence in our safety standards, financial stability, and commitment to construction excellence.
Luxury Construction Services in Wandsworth
House Extensions Wandsworth
Meticulously crafted rear, side and wraparound extensions that maximise space in Wandsworth's period terraces with premium contemporary finishes.
Learn more →Loft Conversions Wandsworth
Premium dormer and hip-to-gable loft conversions creating luxurious additional living space within Wandsworth's characteristic Victorian rooflines.
Learn more →Home Renovations Wandsworth
Comprehensive luxury renovations that redefine Wandsworth homes, from bespoke kitchens and bathrooms to full structural reconfigurations.
Learn more →Basement Conversions Wandsworth
Expert basement excavation creating premium subterranean spaces — home gyms, cinemas and entertaining areas beneath Wandsworth properties.
Learn more →Groundworks Wandsworth
Professional foundations, underpinning and drainage solutions engineered to the highest standards for construction projects across SW18.
Learn more →Hard Landscaping Wandsworth
Bespoke driveways, garden terraces, retaining walls and outdoor living spaces that complete your Wandsworth home transformation.
Learn more →House and kitchen extensions in Wandsworth
Wandsworth Town is Victorian terraces in the Tonsleys and around Old York Road, Edwardian houses in Southfields and Earlsfield, and 1930s semis towards Wimbledon Park. Side-return kitchen extensions on the Tonsleys terraces and wraparounds on the Southfields grid houses are the typical Wandsworth projects, often with a lower-ground dig-out.
As a guide, a well-built single-storey rear or side-return extension in Wandsworth 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. The Tonsleys, Wandsworth Town and the Southfields Grid are conservation areas, and Wandsworth Council applies a basement policy. We confirm permitted development rights at the first visit and handle any application to Wandsworth Council through our in-house design team.
Planning a kitchen extension? See our kitchen extensions page for layouts, glazing and costs.
Loft conversions in Wandsworth
Wandsworth's Victorian and Edwardian roofs suit L-shaped rear dormers; in the Tonsleys conservation area a rear-only dormer set below the ridge is expected.
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 Wandsworth loft, so the figure reflects the actual roof rather than an assumption.
Renovations and refurbishment in Wandsworth
Wandsworth renovations are full refurbishments of Victorian and Edwardian terraces, often combining roof, services and layout work in one contract. Typical Wandsworth 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 Wandsworth project runs on a JCT contract with a written specification and our 10-year workmanship warranty.
Planning approvals in Wandsworth
Wandsworth Council approved 91.5% of householder planning applications decided between September 2025 and August 2026, against a London average of 85.8%; a typical decision took about 8.0 weeks from validation. Loft conversions that needed planning permission were approved 90.2% of the time and extensions 93.8%.
See how every London borough compares, including loft and extension approval rates, in our 2026 London planning approvals study.
Recent Alstruct projects across London
Limehouse Cottage, E14
Underpinning, ground and first-floor extensions and a full renovation with bespoke joinery.
View project →Whitehall Park, Archway N19
Full Victorian terrace renovation and rear extension with triple glazing and aluminium sliding doors.
View project →Dunstan Road, Golders Green NW11
Rear extension, two-storey side extension and full renovation of a 1930s semi-detached house.
View project →Beyond the projects above, we have recent and current sites in W4, W14, W6, W11, W12, SW19 and SW6 within about five miles of Wandsworth, and we work across every London borough from our office in South Woodford, E18. See all completed projects →
Common questions about building in Wandsworth
Do Alstruct cover Wandsworth?
Yes. Alstruct takes on extensions, renovations and loft conversions in Wandsworth 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 Wandsworth?
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. Victorian terraces and edwardian semis 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 Wandsworth?
Wandsworth sits in Wandsworth Conservation Areas, which means Permitted Development rights are restricted and most extensions require full planning permission from Wandsworth Council. We handle the planning application, design drawings and party wall notices on your behalf.
What types of property do you work on in Wandsworth?
Victorian terraces and Edwardian semis are the most common homes in Wandsworth. 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 Wandsworth?
Once design and approvals are signed off, we typically start on site in Wandsworth 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 Wandsworth?
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 Wandsworth.
Nearby areas we cover
Alstruct works across every London borough. Here are areas close to Wandsworth with dedicated local pages: