Builders in Southgate N14 | House Extensions & Loft Conversions
Trusted local builders delivering high-end residential building services across Southgate (N14) and surrounding North London & Hertfordshire postcodes.
Direct line to our Barnet project team • Mon–Fri 8:00am – 5:00pm
High-end residential building services in Southgate.
The Construction Collective delivers high-specification building projects across Southgate and the wider N14 area. Our directors and site managers bring over 25 years of combined industry experience. From rear kitchen extensions and garage conversions on Southgate's 1930s suburban homes to full domestic renovations, we understand the local architecture, Enfield Council's planning requirements and the standards homeowners here expect. Every project is fully managed from design to completion — one team, one point of contact, zero stress.
Southgate's 1930s semis and detached houses are perfectly suited to contemporary open-plan reconfiguration — removing internal walls with structural steel, extending at the rear for a large kitchen dining space, or converting an attached garage into usable living accommodation. We design with a structural engineer, manage planning and building control, and finish to a high standard throughout.
Recent Projects in North London
While we prepare a dedicated Southgate case study, explore current structural, extension and conversion work delivered by our team across North London.
Single-Storey Rear Extension & Structural Renovation
A turnkey single-storey rear extension and full ground floor reconfiguration in East Barnet (EN4), featuring extensive structural steel knock-throughs, precision subfloor screeding, and complete architectural fit-out.
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Category 3 Dormer Loft Conversion Above Commercial Premises
A complex Category 3 dormer loft conversion creating a high-spec upper-floor residential dwelling above active commercial high-street premises in Friern Barnet (N11). Features bespoke timber winder staircase access, acoustic floor decoupling, and full Building Control Part B fire separation.
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Full Property Renovation
Full ground-floor property renovation in the Hampstead conservation area — sympathetic restoration with a contemporary finish.
View projectLocal Planning & Building Control in Southgate
London Borough of Enfield
Projects in Southgate should be checked against the London Borough of Enfield's current planning guidance before design work is finalised. Many single-storey rear extensions and loft conversions can proceed under Permitted Development, but those rights have size and design limits and can be removed or restricted in conservation areas, by Article 4 directions or on flats and listed buildings. Southgate's 1930s suburban houses often suit rear extensions and hip-to-gable loft conversions, while homes in or near local conservation areas need extra care over roof forms, windows and street-facing changes.
Building Control approval is separate from planning and covers structure, fire safety, insulation, ventilation and drainage. Where work involves a shared wall, a new steel bearing into a party wall or excavation close to neighbouring foundations, the Party Wall etc. Act 1996 usually applies and notices must be served before work starts. We coordinate the architect, structural engineer, party wall surveyor and building inspector so these approvals are in place before construction begins.
Governing Council
Planning applications, prior approvals and Lawful Development Certificates for Southgate (N14) are decided by the London Borough of Enfield. We check its current local plan and design guidance before drawings are finalised.
Permitted Development Realities
Loft conversions can typically add up to 40m³ of roof space on terraced houses and 50m³ on semi-detached and detached houses. Single-storey rear extensions can usually project 3m (attached) or 4m (detached) under standard rights, extending to 6m or 8m through the prior approval process. Flats, maisonettes, front or side-facing dormers and anything beyond these limits need full planning permission.
Conservation Areas & Article 4
Conservation areas, listed buildings and Article 4 directions remove or restrict Permitted Development rights. Where they apply we prepare the correct planning or listed building consent route, with materials and detailing matched to the street's character.
Permitted Development limits are summarised from national rules; every property is confirmed at survey.
Typical Project Timelines in Southgate
Rear & Kitchen Extensions
10–14 Weeks
Fixed-price structural shell to turnkey finish.
Dormer & Mansard Lofts
7–10 Weeks
Complete structural timberwork, glazing & Part P/B sign-off.
Full Home Refurbishments
8–16 Weeks
Structural reconfiguration, acoustic decoupling & bespoke joinery.
Typical on-site durations once approvals are in place; your exact programme is set out with your quotation.
Managed Site Operations Across Southgate
- Council highway permits, scaffolding licences and parking bay suspensions fully managed.
- Timed muck-away grab collections to prevent street congestion.
- Full adherence to the Party Wall etc. Act 1996 on all shared structural boundaries.
Five clear steps. Zero surprises.
Free Site Visit & Consultation
We visit your property, discuss your ideas and provide practical advice on the best way to achieve your goals.
Design & Planning
We work with architects and consultants to prepare drawings, planning applications and technical information where required.
Quotation & Programme
A detailed quotation outlining the scope of works, project timeline and key milestones — so you know exactly what you're paying for.
Construction
Your dedicated project manager oversees every stage of the build, coordinating trades and maintaining quality standards.
Completion & Handover
Final inspections are completed and your project is handed over ready for you and your family to enjoy.
How much will your project cost?
Get an instant cost estimate for your extension, loft conversion, renovation or new build — tailored to your project in under 60 seconds.
Frequently Asked Questions
Common questions from homeowners in Southgate (N14).