Premium Builders in Balham
Premium house extensions, renovations and loft conversions in Balham, London.
Expert Construction Services in Balham, SW12
Affectionately known as the "Gateway to the South", Balham has established itself as one of South London's most sought-after residential neighbourhoods. The area's handsome Victorian terraces, tree-lined streets and excellent transport links attract a discerning community of young professionals and families who demand quality in every aspect of their homes. Alstruct Ltd provides premium construction services tailored specifically to Balham's period housing stock, helping homeowners unlock the full potential of their SW12 properties.
Balham's residential character is defined predominantly by its fine Victorian terraced housing, with many properties featuring classic London layouts: bay-fronted reception rooms, narrow side returns and generous rear gardens. These homes are perfectly suited to the transformative extensions and loft conversions that Alstruct specialises in. A well-designed rear extension or side return infill can create the open-plan kitchen-living spaces that Balham's lifestyle-conscious residents desire, while a dormer or mansard loft conversion adds a valuable master suite or home office without sacrificing garden space.
Navigating Wandsworth Council's planning requirements is essential for any construction project in Balham. Parts of the area fall within conservation zones where stricter controls apply, and the borough has specific policies on basement developments and party wall matters given the predominantly terraced housing stock. Alstruct's team has deep experience working with Wandsworth's planning department, preparing applications that satisfy local policies while delivering ambitious, design-led results for our clients.
Why Choose Alstruct in Balham?
- Specialist expertise with Victorian terraced properties
- In-depth knowledge of Wandsworth Council planning policies
- CHAS Elite, Constructionline Gold & FMB accredited
- Complimentary site survey and design consultation
- Dedicated project manager for seamless delivery
- Party wall expertise for terraced property projects
- Transparent, fully itemised quotations with no hidden costs
- Strong portfolio of completed projects across SW12
Frequently Asked Questions — Balham
Do I need planning permission for a rear extension in Balham SW12?
Many single-storey rear extensions in Balham fall under Permitted Development rights, allowing you to extend up to 3 metres (terraced) or 4 metres (detached) without a full planning application. However, if your property is in one of Wandsworth's conservation areas, a formal application will be required. Alstruct manages the entire planning process on your behalf.
How much does a loft conversion cost in Balham?
Loft conversions in Balham SW12 typically range from £45,000 to £85,000 depending on the type and specification. A dormer conversion, the most popular choice for Balham's Victorian terraces, generally falls in the £50,000–£70,000 range. Alstruct provides a detailed, itemised quotation after a complimentary site visit.
How does Wandsworth Council's planning process work?
Wandsworth Council processes planning applications through their online portal. Standard householder applications take around 8 weeks for a decision. Alstruct prepares all drawings, design-and-access statements, and application documentation, and liaises directly with Wandsworth planning officers to give your project the strongest possible case.
Do I need a party wall agreement for my Balham extension?
If your extension or loft conversion involves work on or near a shared boundary wall, you are legally required under the Party Wall etc. Act 1996 to serve notice on your neighbours. This applies to the majority of terraced properties in Balham. Alstruct works alongside experienced party wall surveyors to ensure the process runs smoothly.
Construction Services in Balham
Extensions in Balham
Rear, side return and wraparound extensions transforming Balham's Victorian terraces into spacious, light-filled contemporary homes.
Learn more →Loft Conversions in Balham
Dormer and mansard loft conversions adding valuable bedrooms and en-suites to Balham's period properties without sacrificing garden space.
Learn more →Renovations in Balham
Complete property refurbishments creating the open-plan, design-led living spaces that Balham's young professional community demands.
Learn more →Basement Conversions in Balham
Expert basement excavation and conversion beneath Balham's terraces, creating home cinemas, gyms or additional living accommodation.
Learn more →Groundworks in Balham
Professional foundations, underpinning and drainage solutions for Balham's Victorian terraced properties and new-build projects.
Learn more →Landscaping in Balham
Premium patios, garden walls and outdoor entertaining spaces designed to complement Balham's attractive residential streetscapes.
Learn more →House extensions in Balham
Balham is dominated by Victorian and Edwardian terraces on the Heaver Estate and around Hyde Farm, with mansion flats along Balham High Road and Nightingale Lane. The classic Balham project is a side-return kitchen extension on a Victorian terrace, often combined with a dig-out of the rear addition to level the floor; wraparounds are common where the plot allows.
Budget guidance for Balham: expect £2,500–£4,000 per m² for a single-storey extension, which puts a 25–30 m² kitchen extension at £75,000–£120,000; two-storey and wraparound schemes are priced on the structure involved (see our house extension cost guide). Hyde Farm, Nightingale Lane and parts of the Heaver Estate are conservation areas, so Wandsworth Council will want rear dormers set below the ridge and traditional materials to the street. Where approval from Wandsworth Council is needed, our in-house design team prepares and submits the application.
Loft conversions in Balham
Heaver Estate and Hyde Farm roofs suit L-shaped rear dormers over the back addition, which is how most Balham families gain a master suite; hip-to-gable applies mainly to the end-of-terrace houses.
Typical London figures are £25,000–£45,000 for a Velux conversion, £45,000–£75,000 for a dormer and £60,000–£100,000+ for a mansard (details in our loft conversion cost guide). Every Balham loft quote follows a measured survey of the roof, head height and stair position, and includes Building Regulations sign-off, fire doors and structural calculations.
Renovations and refurbishment in Balham
Balham refurbishments usually mean opening up the ground floor, new bathrooms, sash window repair and full redecoration. Typical Balham refurbishments include structural openings with steel beams, new kitchens and bathrooms, rewiring, heating and period repairs such as sash windows, cornices and floors. Budgets are set out in our renovation cost guide; in Balham, as everywhere, we work to a JCT contract, a written specification and a 10-year workmanship warranty.
Recent Alstruct projects across London
Hawthorn Cottage, Limehouse E14
Underpinning, ground and first-floor extensions and a full renovation with bespoke joinery.
View project →Lyal Road, Bow E3
Victorian terrace: ground-floor lowering, underpinning, flat-roof extension and large roof glazing.
View project →Whitehall Park, Archway N19
Full Victorian terrace renovation and rear extension with triple glazing and aluminium sliding doors.
View project →Beyond the projects above, we have recent and current sites in W14, SW19 and SW6 within about five miles of Balham, and we work across every London borough from our office in South Woodford, E18. See all completed projects →
We Also Cover Areas Near Balham
Common questions about building in Balham
Do Alstruct cover Balham?
Yes, Alstruct regularly works on extensions, renovations and loft conversions across Balham and surrounding London neighbourhoods. We visit, measure and provide a written quote.
How much does a house extension cost in Balham?
House extensions in Balham typically cost £50,000–£200,000+ depending on size, specification and the property's existing structure. Victorian and edwardian terraces are the most common build type in the area, and our quote will reflect the specific condition and layout of the property.
Do I need planning permission for an extension in Balham?
Balham sits in Balham Conservation Area, 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 Balham?
Most Balham projects we deliver are on Victorian and Edwardian terraces. We have direct experience with the structural, compliance and aesthetic considerations specific to these property types, including listed building consent work where applicable.
How quickly can Alstruct start a project in Balham?
Once design and approvals are signed off, we typically start on site in Balham within 6–12 weeks depending on programme availability. Planning + design adds 8–16 weeks before site start. For urgent projects, get in touch on 020 8080 8240 to discuss timing.
Are you accredited to work in Balham?
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 Balham.
Nearby areas we cover
Alstruct works across every London borough. Here are areas close to Balham with dedicated local pages: