Nexus Lofts & Extensions
Side return house extension by Nexus in West London

Our Services

House extensions in Ealing
& across West London.

Side return, flat roof, L-shape and double-storey extensions, designed, engineered and delivered by our in-house team across Ealing, Acton, Chiswick and West London, backed by a ten-year warranty.

Get a free quoteExplore options
MyBuilder
★★★★★ 5.0
10 Year Warranty

House Extension Specialists, Ealing

More space, more light, seamlessly connected to your home.

Nexus is an Ealing-based extension company building across W3, W4, W5, W6, W7, W12 and W13. Side return extensions in London terraces are our most requested build, alongside rear, L-shape and double-storey extensions. From concept sketches to the final coat of paint, we manage design, planning, structural engineering, party wall and construction under one roof, with a single project manager keeping every stage on programme and on budget.

Flat Roof Extension

Flat Roof Extension

A flat roof extension is a modern, cost-effective way to increase ground-floor living space. It offers a sleek, contemporary appearance and is ideal for kitchens, dining rooms, home offices or utility rooms.

Why homeowners choose it

  • ▸Generally more affordable than pitched roof alternatives
  • ▸Minimal impact on existing building height
  • ▸Perfect for modern, clean-lined architecture
  • ▸Easier to maintain and adapt in the future

Typical lead time: Design + planning: 2–6 weeks · Build duration: 6–12 weeks depending on size and specification.

  • ▸Roof lanterns or skylights for added natural light
  • ▸Warm-roof insulation systems
  • ▸Fibre-glass (GRP), EPDM rubber or built-up felt roofing
  • ▸Bi-fold, sliding or French doors
  • ▸Contemporary cladding and render finishes
Enquire now
Side Return Extension

Side Return Extension

A side return extension fills in the narrow alley alongside your kitchen, one of the most effective ways to widen a Victorian terrace in West London. It expands your home along the existing side wall using space that is otherwise wasted, without significantly reducing garden size.

Why homeowners choose it

  • ▸Makes efficient use of wasted space
  • ▸Improves layout, flow and functionality
  • ▸Increases overall property value
  • ▸Many single-storey designs fall under permitted development

Typical lead time: Overall: 7–12 weeks · Design and approvals: 2–3 weeks · Construction: 3–6 weeks.

  • ▸Single or double-storey extensions
  • ▸Open-plan kitchens or living areas
  • ▸Utility rooms, home offices or extra bedrooms
  • ▸Rooflights or glazed roofing for natural light
  • ▸Bifold or sliding doors
  • ▸Bespoke internal finishes and layouts
Enquire now
L-Shape Extension

L-Shape Extension

An L-shape extension transforms unused side and rear space into a large, versatile living area, perfect for open-plan layouts, larger kitchens, utility rooms or extra bedrooms.

Why homeowners choose it

  • ▸Creates generous, multi-functional floor space
  • ▸Ideal for Victorian and Edwardian properties
  • ▸Excellent natural light with multiple elevations
  • ▸Allows for creative interior zoning

Typical lead time: Design + planning: 6–10 weeks · Build duration: 10–15 weeks depending on size and structural requirements.

  • ▸Combination of flat and pitched roof sections
  • ▸Floor-to-ceiling glazing, lanterns or rooflights
  • ▸Bespoke kitchen or open-plan living configurations
  • ▸Integrated storage, underfloor heating and smart-home features
Enquire now
Double-Storey Extension

Double-Storey Extension

A double-storey extension is the most impactful way to maximise your property's footprint, adding substantial living space across two floors, often used for larger kitchens, extra bedrooms, bathrooms or a home office.

Why homeowners choose it

  • ▸Delivers the greatest increase in square footage and value
  • ▸Creates balanced living and sleeping arrangements
  • ▸Ideal for growing families
  • ▸Long-term, future-proof investment

Typical lead time: Design + planning: 6–12 weeks · Build duration: 12–18 weeks depending on scale and structural needs.

  • ▸Choice of roof style (pitched, gable, hip)
  • ▸Internal reconfiguration to optimise layout
  • ▸Juliette balconies, large windows or bi-fold doors
  • ▸Brick matching, render or cladding for seamless integration
Enquire now

Our Process

From first call to final handover

A clear, five-stage journey designed to keep you informed and in control at every step.

  1. Step 01

    Consultation

    A no-obligation site visit to understand your goals, budget and timeline.

  2. Step 02

    Design & Quote

    Detailed drawings and a transparent, itemised quotation, with no surprises later.

  3. Step 03

    Planning & Approvals

    We handle planning permission, building control and party wall agreements end-to-end.

  4. Step 04

    Build

    One dedicated team, weekly updates and a clean, considerate site from start to finish.

  5. Step 05

    Sign-off & Warranty

    Final inspections, snagging and handover, backed by our 10-year workmanship warranty.

Home Extension FAQs

Extension questions, answered

Timelines, planning, cost and structural: the questions we hear most from West London homeowners about home extensions.

Ask us directly

Single-storey rear and side extensions typically run 8–14 weeks on site; L-shape and double-storey builds usually 12–18. You'll have a firm programme, with weekly progress updates, before any work begins.

Loft Conversions

You might also consider

Loft Conversions

If it's upstairs space you need (bedroom, en-suite, home office), our loft team designs and builds dormer, hip-to-gable, L-shape and mansard conversions across West London.

See our lofts

Ready when you are

Let's build something worth staying home for.

Book a free, no-obligation site visit. We'll walk your space, talk through what's possible, and follow up with a clear, itemised quote: no pressure, no hidden extras.

+44 7474 193 058+44 7955 577 776hello@nexuslofts.co.uk
Mon–Fri, 8am–6pm · Typically reply within 24 hours

Request a callback

Tell us about your project and we'll be in touch shortly.

Prefer to see the full form? Head to our contact page →