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In-house teams · never a marketplace
12-month written guarantee
A clear next step before any work
Hampstead Renovations Ltd · company 16838595 · incorporated 2025
HHampstead On Demand
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London · North · Central · South West · In-house delivery

House Extension in London — Rear, Side-Return & Wraparound

House extensions across North, Central and South West London — rear, side-return and wraparound forms with planning, structure and build coordinated in-house.

House extension briefs cover rear, side and wraparound additions for terraces, semis and larger homes. Design input, planning path, structural works, waterproof junctions, services and finishes are sequenced in one written programme — not a marketplace of disconnected traders.

  • House Extension
  • Rear Extension
  • Side Return Extension
  • Wraparound Extension
  • Kitchen Extension
  • Single Storey Extension
  • Double Storey Extension
  • Extension Planning Permission

Covering 78 London neighbourhoods

Start your briefCall +44 20 8054 8756

Featured house extension neighbourhoods

Choose the page for your exact neighbourhood where one exists. Availability is always confirmed from your postcode.

House extension in HampsteadNW3House extension in Hampstead VillageNW3House extension in Hampstead HeathNW3House extension in West HampsteadNW6House extension in South HampsteadNW3House extension in Belsize ParkNW3House extension in Swiss CottageNW3House extension in FrognalNW3House extension in Primrose HillNW3House extension in Gospel OakNW3House extension in Chalk FarmNW3House extension in North EndNW3House extension in Vale of HealthNW3House extension in HighgateN6House extension in Highgate VillageN6House extension in Golders GreenNW11House extension in Hampstead Garden SuburbNW11House extension in Childs HillNW3

Premium London coverage

House Extension by area

These house extension area pages currently clear our local evidence gate — still not an attendance guarantee. Availability is confirmed after reviewing the postcode and brief.

To discuss work, start a project brief with photos and details — this portal is not a photo portfolio.

NW3

House Extension in Belsize ParkNW3 · conservation context · Mansion blocksHouse Extension in Chalk FarmNW3 · Victorian terracesHouse Extension in Childs HillNW3 · 1930s semisHouse Extension in Finchley RoadNW3 · New buildsHouse Extension in FrognalNW3 · conservation context · Large detached housesHouse Extension in Gospel OakNW3 · Victorian terracesHouse Extension in HampsteadNW3 · conservation context · Victorian/Edwardian terracesHouse Extension in Hampstead HeathNW3 · conservation context · Victorian terracesHouse Extension in Hampstead VillageNW3 · conservation context · Georgian/Victorian listedHouse Extension in North EndNW3 · conservation context · Large detached mansionsHouse Extension in Primrose HillNW3 · conservation context · RegencyHouse Extension in South HampsteadNW3 · Mansion flatsHouse Extension in Swiss CottageNW3 · Mansion flatsHouse Extension in Vale of HealthNW3 · conservation context · Period cottages

Looking for another postcode? Browse all areas or use the coverage checker.

Why Choose Hampstead On Demand?

  • ✓Reviewed by the operating team, not a provider marketplace
  • ✓The price basis is confirmed before planned work
  • ✓A written quote or confirmed call-out terms before work
  • ✓Postcode and property details considered during triage
  • ✓Relevant trade credentials checked before work

What House Extension covers

House extensions across North, Central and South West London — rear, side-return and wraparound forms with planning, structure and build coordinated in-house. House extension briefs cover rear, side and wraparound additions for terraces, semis and larger homes. Design input, planning path, structural works, waterproof junctions, services and finishes are sequenced in one written programme — not a marketplace of disconnected traders. Common brief themes include House Extension, Rear Extension, Side Return Extension, Wraparound Extension, Kitchen Extension, Single Storey Extension, Double Storey Extension, Extension Planning Permission, Party Wall Extension — always scoped against the individual property. Renovation briefs separate survey/design input from build where that protects programme and price clarity. Phasing, occupancy and freeholder rules are recorded early so the written package stays controllable. Hampstead On Demand is not a marketplace: accepted work is delivered through Hampstead Renovations or Hampstead Maintenance after fit and capacity are confirmed.

House Extension across premium London areas

Dedicated House Extension's area pages currently cover neighbourhoods such as Belsize Park, Hampstead, Hampstead Village, Highgate, Maida Vale and Primrose Hill (including NW3, N6, NW8, NW6 districts). Those pages explain local process context for homeowners and managers. A link is not an attendance guarantee — every brief is reviewed against the exact postcode, access and current team capacity.

What to include in a house extension brief

Include the postcode, a clear description of the issue or intended work, access details and useful photographs or plans. House extensions across North, Central and South West London — rear, side-return and wraparound forms with planning, structure and build coordinated in-house. Submission starts a review; it is not a confirmed booking. For urgent safety issues, call 020 8054 8756 first.

How house extension scope is confirmed

We first check whether the brief fits Hampstead Maintenance or Hampstead Renovations and whether the appropriate team is currently available. If an assessment, survey or specialist input is needed, that next step is agreed before work is scheduled. The competence, registration and insurance appropriate to the accepted scope are confirmed for the job — not claimed generically from a service label.

After you submit a house extension request

You receive a clear next step: a request for more information, a survey or site-visit proposal, or a written quote basis when the scope is clear enough to price safely. If we cannot accept the work, we say so. You keep one point of contact for the accepted brief rather than managing multiple third-party traders.

House Extension pricing and payment

Pricing depends on the accepted scope, existing condition, access, timing, materials and any professional or compliance input required. Where we can quote, the written document states the price basis, inclusions, assumptions and exclusions. Smaller completed jobs are paid by bank transfer after completion; larger works use the deposit and final-payment terms in the accepted quote.

Credentials, approvals and cover

The required trade registration, competence, certification, insurance and approval route depend on the exact work. Those requirements and the responsible party are confirmed for the job. Formal planning, Building Control or other professional advice remains with the relevant authority or appointed professional. Accepted work carries our 12-month workmanship guarantee subject to the written scope and exclusions.

When a site visit is needed

Straightforward house extension requests with clear photographs can sometimes be quoted from the brief. Work involving openings, structural fabric, concealed services, complex access or unclear faults in period stock usually needs a site visit first. We will not invent a fixed price when the property has not been seen safely enough to define the scope.

Common house extension brief themes

People often brief house extension work involving House Extension, Rear Extension, Side Return Extension, Wraparound Extension, Kitchen Extension, Single Storey Extension, Double Storey Extension, Extension Planning Permission, Party Wall Extension. Those themes are orientation only — suitability still depends on the property fabric, access, freeholder rules and the written scope we can accept after review. If your issue is urgent and unsafe, call 020 8054 8756 first rather than waiting on an online form.

Photographs that speed up house extension triage

Clear photographs usually reduce back-and-forth more than a long phone call. For house extension, useful images show the fault or room close-up, the wider context (adjacent finishes, ceiling, elevation or plant cupboard), and any access constraint. Label what you think the problem is in plain language — we still confirm the method only after fit and capacity review. Submission remains a request for a next step, not a booking.

Freeholder and building access for house extension

Flats and mansion blocks often add freeholder, managing-agent or lease constraints to a house extension brief. Where you already hold a licence-to-alter, working-hours note, riser plan or previous survey, attach it with the postcode and photographs. Lift size, porter rules and communal corridor protection frequently affect how attendance is programmed. We will not invent freeholder approval or a fixed attendance window from a neighbourhood page alone — those facts come from the property documents and the accepted written scope for the job.

What this house extension hub does not invent

We do not publish awards, star ratings, fixed response-time guarantees or a single London-wide rate card for house extension. Neighbourhood landers explain process context; they are not attendance guarantees. Where orientation ranges appear, they are not a quote for your property. Accepted work is scoped and priced in writing for the individual brief, with job-specific credentials confirmed before planned work starts.

House Extension brief checklist

  • Full postcode and property type
  • Description of the fault or project outcome
  • Photographs of the affected rooms or fabric
  • Access, parking and occupancy notes
  • Any freeholder, conservation or report documents you already hold
  • Preferred timing window (not a booking)
  • Area context if relevant (e.g. street character near Belsize Park)
  • Note if the brief relates to: House Extension
  • Note if the brief relates to: Rear Extension
  • Note if the brief relates to: Side Return Extension
  • Note if the brief relates to: Wraparound Extension

What we decide from your house extension brief

  • Whether make-safe or planned work is appropriate
  • Whether Hampstead Maintenance or Hampstead Renovations should own the job
  • Whether a survey or specialist input is required first
  • What credentials or notifications the accepted scope needs
  • Whether current capacity can support the programme
  • Whether the programme fits planned attendance rather than emergency make-safe

Frequently Asked Questions

How do I start a house extension brief?▼
Use the online form or call 020 8054 8756. Include the postcode, a clear description of the issue or project, photographs where helpful, and access notes. Submission starts a review — it is not a confirmed booking.
Where do you accept house extension briefs?▼
You may submit for Hampstead, North West London and wider premium London postcodes. Dedicated pages currently focus on neighbourhoods such as Belsize Park, Hampstead, Hampstead Village, Highgate and Maida Vale, with other postcodes reviewed case by case. Coverage and timing are confirmed after the location and scope have been reviewed — not solely because an area page exists.
Is House Extension delivered by third-party traders?▼
No. Accepted work is routed to Hampstead Renovations or Hampstead Maintenance. We confirm the competence and any job-specific registration or insurance for the accepted scope before work starts.
How is house extension pricing confirmed?▼
Pricing depends on access, fabric condition, materials, programme and any approvals needed. Where we can quote, the written document states inclusions, assumptions, exclusions and payment terms. Smaller completed jobs are paid by bank transfer after completion; larger works use the deposit and final terms in the accepted quote.
Do I always need a site visit for house extension?▼
Not always. Clear photographs and a written description can be enough for straightforward scopes. Complex fabric, structural openings, concealed services or unclear access usually need a visit before a safe price basis can be written.
What house extension themes do people commonly brief?▼
Common themes include House Extension, Rear Extension, Side Return Extension, Wraparound Extension, Kitchen Extension. Suitability still depends on the individual property, access and the written scope we can accept after review — tags are orientation, not a fixed menu or price list.
What freeholder or building access notes help for a house extension brief?▼
For flats and mansion blocks, attach any licence-to-alter, working-hours note, riser plan or managing-agent rules you already hold. Lift size, porter rules and communal corridor protection often affect how house extension attendance is programmed. Freeholder approval is never invented from a neighbourhood lander alone — those facts come from the property documents and the accepted written scope.
Does a house extension brief always need Building Control?▼
Not always. Whether house extension work needs a Building Control notification, competent-person route or neither depends on the accepted scope — openings, structural alterations, drainage changes and certain electrical or heating works are more likely to. We flag known compliance questions in triage; a service hub does not invent a notification outcome from a neighbourhood page alone. Attach any existing notice or completion certificate if you hold one.
Can I submit a house extension brief in London?▼
Yes. Send the postcode and job details for review. Submission is not a booking; we confirm whether the brief fits, current availability and the next step.
How is house extension work priced?▼
The price depends on the accepted scope, access, timing, materials and any assessment required. We confirm a written quote or other agreed price basis before planned work starts.
Do I need planning permission for a house extension in London?▼
It depends on design, previous alterations, designation and current local and national rules — including whether permitted development still applies. We confirm the assessment path for the specific property; formal decisions remain with the local planning authority.
How much does a house extension cost in London?▼
Cost depends on footprint, glazing, structural complexity, ground conditions, specification and whether a full kitchen fit-out is included. Market values near the area are context only — pricing follows the accepted written scope, not a postcode rate card.
Can you build a side-return or wraparound extension in London?▼
Yes, where the host house, garden and neighbours allow. Side-return and wraparound forms need careful structure, drainage and light assessment. Photographs of the rear and side elevations help triage before design lock.
Does a house extension in London need a party wall agreement?▼
Works to shared walls or excavations near a boundary may engage the Party Wall etc. Act 1996. Not every extension is a party-wall matter — formal notices and awards remain with the building owner and appointed surveyors.

More topics: all FAQs · quotes & payments · service areas · renovations

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How the brief works

1

Tell us what you need

Describe your project or issue using our online form or by phone.

2

Receive a quote

We review the request and respond with clear pricing or the next step.

3

Agree the next step

We confirm availability and agree any visit or work date with you.

4

Work delivered

Job-specific qualifications, registrations and insurance are confirmed first.

5

Follow-up

Workmanship has 12-month cover, subject to the published terms.

Need help with a property?

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Start a brief+44 20 8054 8756