Award-Winning Design & Build in Borehamwood
Borehamwood is one of the most practical places in Hertfordshire to extend and renovate. The properties across WD6 sit on generous plots with wide frontages and deep gardens — far more space to work with than most London properties. Planning through Hertsmere Borough Council is generally more straightforward and faster than in the London boroughs.
And because much of the housing dates from the 1950s to 1970s, it is ready for the kind of comprehensive modernisation that LCCL Construction specialises in. We serve Borehamwood, Elstree and Shenley from our base in Finchley N3, just 20 minutes up the A1. We have been transforming homes across WD6 for over 20 years.
Why Borehamwood Homeowners Choose LCCL
What makes LCCL different from other builders quoting in Borehamwood is that we handle everything ourselves. Many builders in Hertfordshire expect you to arrive with architect’s drawings and structural engineer’s calculations already in hand. With LCCL, architecture, structural engineering, planning, construction and project management are all included in one comprehensive quote. One team, one invoice, one company accountable for the result.
LABC Building Excellence Award Winners 2024 — Independent verification that our work meets the highest national standards.
200+ Reviews Averaging 4.7/5 — Real homeowners who trusted us with their homes across Hertfordshire and North London.
Hertsmere Planning Experience — We submit applications to Hertsmere Borough Council regularly and know their approach, timescales and expectations.
Complete Design & Build Including Architecture — In-house architectural design, structural engineering, planning, all construction, project management, building control and 10-year LABC warranty. Transparent pricing with no hidden extras. Final costs confirmed once designs and structural requirements are agreed.
Our Services
Design and build under one roof, Architecture, planning, construction, and finishing — managed by one team, from start to finish.
- HOUSE EXTENSIONS
House Extensions in Borehamwood
The biggest advantage Borehamwood properties have over their London equivalents is space. Most houses across WD6 sit on plots wide enough for side extensions and deep enough for substantial rear additions. Garages — integral, attached or detached — are common and offer opportunities for conversion or integration into a larger extension scheme.
The result is that you can typically build a bigger extension in Borehamwood than you could in London, for less money, with simpler planning.
Extension Types We Build in Borehamwood
Single-Storey Rear Extensions — The most popular project in WD6. Generous gardens allow for deeper extensions than most London properties. Permitted development allows up to 6 metres for detached houses and 4 metres for semis without planning permission. Costs: £48,000 to £80,000.
Garage Conversions and Extensions — One of the most cost-effective ways to add a room in Borehamwood. Many properties have integral or attached garages that can be converted to habitable space for £15,000 to £30,000. Often, the smartest approach is to convert the garage and extend beyond it simultaneously, creating a large open-plan kitchen-family room. Garage conversion plus extension typically costs £50,000 to £80,000.
Wraparound Extensions — The wider plots in Borehamwood make wraparound extensions particularly effective, combining side and rear for a dramatically larger ground floor. Costs: £75,000 to £110,000.
Double-Storey Extensions — Popular with growing families who need both living space and bedrooms. The generally relaxed permitted development environment in Borehamwood makes double-storey extensions more straightforward than in conservation-heavy London boroughs. Costs: £90,000 to £170,000.
What Is Included in Every Extension Quote
All prices include: in-house architectural design, structural engineering, planning applications to Hertsmere Borough Council where required, all construction labour and materials, project management, building control via LABC, and a 10-year LABC warranty. No hidden extras. Call 020 8037 7332.
- LOFT CONVERSIONS
Loft Conversions in Borehamwood
Many Borehamwood properties date from the 1950s, 1960s and 1970s — a period when roof construction varied more than in the consistent 1930s housing stock. Some postwar properties have excellent roof spaces with generous ridge heights and straightforward truss configurations. Others, particularly those built with modern truss rafters, require more structural work to create usable loft space.
The key is a professional assessment before committing — which we provide free of charge. Where the roof structure is suitable, a loft conversion in Borehamwood adds a full bedroom and en-suite, increasing property value and avoiding the cost and disruption of moving to a larger home.
Loft Conversion Types for Borehamwood Properties
Hip-to-Gable Conversions — The most popular choice for Borehamwood’s semis and hipped-roof properties. Extends the hipped roof to a full gable wall, combined with a rear dormer. Costs: £48,000 to £70,000.
Rear Dormer Conversions — Suits all property types across WD6. A flat-roof rear dormer adds headroom and usable floor space. Most qualify under permitted development. Costs: £42,000 to £62,000.
L-Shaped Dormers — Combines rear and side dormers for semis. Two bedrooms or a large master suite. Costs: £52,000 to £72,000.
Full Roof Remodels — Some Borehamwood properties benefit from a complete roof redesign where the existing roof pitch, truss structure or headroom is not ideal for conversion. This can include raising the ridge height where planning allows. Costs from £60,000.
What Is Included in Every Loft Quote
All prices include: in-house architectural design, structural engineering, scaffolding, all construction including steelwork, dormer or gable build, new staircase, insulation, plastering, electrics, plumbing for en-suite, building control via LABC, project management, and a 10-year LABC warranty. No hidden extras. Call 020 8037 7332.
- RENOVATIONS
Renovations in Borehamwood
The majority of Borehamwood’s housing dates from the 1950s to 1970s — solidly built but often long overdue for comprehensive modernisation. These properties were designed for a different era of family living: separate rooms for every function, small kitchens, basic bathrooms, storage heaters or underperforming boilers. Bringing them up to 21st-century standards requires a systematic approach that addresses layout, services and finishes together.
The most transformative renovation in a typical Borehamwood home is ground-floor reconfiguration: removing the wall between the rear dining room and kitchen, often extending into the hallway, to create a single open-plan living and cooking space. Combined with new French doors or bifold doors to the garden, this single change modernises how the entire ground floor feels.
Beyond layout, comprehensive renovation work typically includes full rewiring to current regulations (essential in properties with original 1950s or 1960s wiring), replumbing including new boiler and radiator system, new kitchen installation, new bathroom installation, replastering where needed, insulation upgrades, new flooring, and complete decoration.
Typical renovation costs in Borehamwood: kitchen renovation £22,000 to £48,000, bathroom renovation £10,000 to £22,000, ground-floor reconfiguration with RSJ £5,000 to £10,000, whole-house refurbishment from £70,000. Detailed quotes — no day rates. Final costs confirmed once designs are agreed.
- ARCHITECTURE
In-House Architecture in Borehamwood
One of the practical advantages of building in Borehamwood compared to inner London is that planning through Hertsmere Borough Council tends to be more straightforward. Decision times are generally shorter, policies are pragmatic, and householder applications for well-designed extensions are routinely approved. That said, properties near the Green Belt boundary, within Elstree Village Conservation Area, or near listed buildings still require careful design and documentation.
LCCL’s in-house architects handle all of this. They design extensions and loft conversions with construction costs in mind from day one, prepare all planning documentation for Hertsmere, manage building regulations via LABC, and coordinate structural engineering. Because they are part of the same team as our builders, there is no gap between design and delivery — what gets drawn is what gets built.
Every Borehamwood project includes: measured survey, concept designs, 3D visualisations, construction drawings, planning applications to Hertsmere Borough Council where required, structural engineering, and LABC building regulations. All included in your quote.
- LOCA PLANNING EXPERTISE
Planning & Local Knowledge — Borehamwood
Conservation Areas & Green Belt
Elstree Village Conservation Area — Covers the historic village centre of Elstree, including Elstree Hill, High Street and the area around the parish church. Properties face restrictions on permitted development and applications must demonstrate design sensitivity. Note that Elstree Village is distinct from the Borehamwood area commonly known as Elstree.
Green Belt — Significant areas around the edges of Borehamwood are designated Metropolitan Green Belt, including land toward Shenley, Radlett and the countryside to the north and east. Proportionate extensions to existing residential properties are generally achievable. Our architects assess Green Belt implications for every relevant property.
Property Types Across Borehamwood
Central Borehamwood — Predominantly 1950s to 1970s semi-detached houses, terraces and maisonettes. Solidly built, generous plots, excellent extension and conversion potential. Kenilworth and Aberford Park Areas — 1960s housing estates with detached and semi-detached properties on generous plots, many with garages suitable for conversion. Elstree Village — Larger detached properties, some period homes. Conservation area designation applies. Shenley Road Corridor — A mix of interwar and postwar housing. Newer Developments — Several recent apartment schemes and housing developments near the station and former studio sites.
Typical Project Timescales
Hertsmere planning decisions: typically 6 to 8 weeks, faster than most London boroughs. Loft conversions: 8 to 12 weeks on site. Single-storey extensions: 10 to 14 weeks. Double-storey extensions: 12 to 18 weeks. Design phase: 6 to 10 weeks.
Party Walls
Semi-detached and terraced extensions across Borehamwood involve party walls. The Party Wall etc. Act 1996 requires formal notification to neighbours before work begins. We manage all party wall notices as part of every project.
Typical Planning Timescales
Hertsmere planning decisions: typically 6 to 8 weeks, faster than most London boroughs. LDCs: approximately 8 weeks. Building control: inspections throughout construction, final sign-off at completion.
Building Control
All LCCL projects are managed through LABC building control. Inspections at each key stage ensure compliance with Building Regulations. At completion, you receive a building control completion certificate and optional 10-year LABC warranty.
Frequently Asked Questions
How much does a house extension cost in Borehamwood?
Rear extensions: £45,000 to £80,000. Wraparound extensions: £65,000 to £105,000. Double-storey extensions: £90,000 to £160,000. All LCCL prices include architectural design, structural engineering, planning applications to Hertsmere Borough Council, construction, project management, and 10-year LABC warranty.
Do I need planning permission in Borehamwood?
Many extensions and loft conversions qualify under permitted development rights. Properties in Elstree Conservation Area face additional restrictions. For Green Belt properties on the edges of Borehamwood toward Shenley and Radlett, planning is more complex — our architects know what Hertsmere’s planning team will accept.
What loft conversions suit Borehamwood properties?
The postwar semis across central Borehamwood suit hip-to-gable and dormer conversions. The 1930s properties near Elstree have hipped roofs ideal for hip-to-gable. Newer properties on estates like Kenilworth and Cowley Hill may have shallower roof pitches requiring mansard-style conversions. We assess your specific property.
How long does a building project take?
Loft conversions: 8 to 12 weeks on site. Single-storey extensions: 10 to 14 weeks. Double-storey: 14 to 20 weeks. Allow 8 to 12 weeks for design and approvals before construction. We provide a full timeline with your quote.
Do you work with Hertsmere Borough Council?
Yes. Our architects submit planning applications to Hertsmere regularly. We understand their local plan policies, their approach to Green Belt, and what their planning officers expect in applications. We handle the entire process.
Areas We Cover
Based in Finchley N3, serving London and Hertfordshire.
North London and Hertfordshire
Barnet | Finchley | Hendon | Muswell Hill | Edgware | Enfield | Borehamwood | Potters Bar | Watford | St Albans
Across London
Hampstead | St Johns Wood | Islington | Kensington & Chelsea | Fulham | Clapham | Richmond | Putney & Wandsworth | Crouch End | Stoke Newington | Highgate | Ealing | Notting Hill | Camden | Queens Park