Belsize Park NW3 · Houses, flats & bathrooms
A home that works beautifully, with its character intact.
House refurbishment, flat renovation and bathroom renovation in Belsize Park. See our work at Belsize Park Gardens, explore the right service and prepare your project with practical Camden guidance.
Serving Belsize Park from our Hampstead studio · NW3 6DN
020 7101 3168
Start with your project
Choose a focused room renovation or a coordinated refurbishment. Each service page explains the scope in more detail and gives you a direct route to discuss the work.
01 The whole house
Plan a house refurbishment around the existing rooms, building fabric and the way you want to live. Coordinate layouts, services, kitchens, bathrooms and fitted storage, with a clear brief for the period features to retain.
02 Converted and purpose-built flats
Develop the layout and finishes alongside a practical plan for the shared building. Check lease requirements, floor construction, service routes and access before finalising a flat renovation, whether it is in a converted house or a purpose-built block.
03 Standalone bathrooms, en-suites and wet rooms
Plan a standalone bathroom renovation or bathrooms within a wider refurbishment. Establish the layout, water supply, drainage and ventilation before choosing fittings and finishes; moving a bathroom or adding an en-suite needs particular attention to service routes.
Space, light and considered storage
Considering more space or a better use of existing rooms in Belsize Park? Compare loft conversion, house extension and bespoke joinery options with the building, ownership and local controls before fixing the brief.
Explore a bedroom or workspace within your Belsize roof, with a layout that considers the stair below and the distinctive form of the villa or terrace.
Belsize includes paired Italianate villas and different Arts-and-Crafts forms. Measure and photograph the actual roof instead of beginning with a generic dormer design.
Consult the current direction and June 2026 design guide for covered roof and rooflight changes. The guide updates controls that have an earlier history.
Plan a Belsize Park extension around a better kitchen, dining area or family room, with the garden and the character of the existing house informing the design.
Assess how an addition affects the balance of the building group and glimpses through to gardens. These relationships form part of Belsize’s identified character.
For a converted villa, check the demise and any shared garden or structural rights before assuming a rear or side area is available to extend.
Add useful wardrobes, library shelving, alcove cupboards or utility storage to a Belsize home while working around its existing windows, doors and decorative details.
Begin with the condition of historic windows and doors and record their profiles. The design guide favours retaining characterful joinery rather than replacing it indiscriminately.
Design internal storage around existing details. Listed status, lease conditions and the specification of any fire doorset are separate from the visual style of the joinery.
Nearby: bespoke joinery in Hampstead Garden Suburb and bespoke joinery near Hampstead Heath.
Bespoke joinery in Belsize ParkTell us how you want to use the space, what needs to stay and which drawings or permissions you already have. A measured brief can connect the roof or extension layout with stairs, storage, lighting and joinery before specifications are priced.
Local work, shown in detail
A local whole-house refurbishment, with photographs from the work and the completed exterior. Explore the full case study for the scope of this Belsize Park Gardens project.
Our work in Belsize Park
Full-house refurbishment in Belsize Park with basement, extension and loft works.
Conservation Area · 5 Storeys
Explore the house refurbishmentThe building sets the brief
Belsize has more than one kind of home. Camden’s character statement describes paired Italianate villas around Belsize Park, village terraces and mews, red-brick houses on Eton Avenue, and tighter Edwardian streets around Glenloch, Glenmore and Howitt Roads. Mansion flats bring a different set of shared-building considerations.
Belsize Conservation Area statement · Belsize statement and character areas (PDF)
Begin with the address
Check the conservation-area boundary, any individual listing and the properties covered by an Article 4 direction. Belsize Conservation Area has defined boundaries; nearby designations include Eton and Parkhill and Upper Park. Do not assume that every Belsize Park or NW3 property has the same controls.
Bring the full address, property type and photographs of the features you want to change. For a flat, include its floor and the relevant lease or managing-agent requirements.
Camden conservation and planning map · Camden conservation areas · Search the National Heritage List for England · Camden heritage Article 4 directions
Separate checks, one clear scope
Internal alterations, changes to a façade and work in a shared building can follow different routes. Establish which requirements apply before ordering work, and agree who will prepare submissions and arrange inspections.
Does the proposed work need a planning application?
Internal alterations generally do not amount to planning development. External changes, extensions, changes of use and excavation need their own assessment. Check the address, conservation designation and any Article 4 direction. The householder permitted-development rules should not be assumed to apply to a flat.
GOV.UK: when planning permission is required · GOV.UK: householder permitted development guidance · Camden heritage Article 4 directions
Could the work affect the building’s special character?
Listing can protect interiors as well as the exterior. Changes to significant layouts, stairs, fireplaces or other historic fabric may need listed-building consent even without a planning application. Check the National Heritage List and discuss the complete proposal with Camden; conservation-area status does not itself mean a building is listed.
Historic England: listed building consent · Historic England: changing an internal layout · Search the National Heritage List for England
Which work needs approval, inspection or certification?
Building Regulations are separate from planning. Structural changes, new bathroom plumbing and electrical work near a bath or shower can bring different requirements. Simple replacement of existing fittings is a different scope. Agree the applicable approval or competent-person route and completion records before starting.
GOV.UK: Building Regulations approval · GOV.UK: work that does not need Building Regulations approval
What do the lease and shared-building arrangements require?
Read the lease before changing a flat. It may permit, restrict or prohibit alterations, and written landlord consent or a licence to alter may be needed separately from council approvals. Check responsibility for floors, external walls and shared services, and agree access requirements with the freeholder or managing agent.
LEASE: alterations and home improvements
Local guidance that changes the specification
Camden updated its Belsize Article 4 guidance in June 2026. Read the current direction and affected-property map before specifying external changes. The controls predate this update and do not apply to every property simply because it is in NW3.
Camden heritage Article 4 directions · Belsize Article 4 direction and map, June 2026 (PDF) · Belsize Article 4 factsheet, June 2026 (PDF)
At an affected property, a genuinely matching repair or replacement is different from a change to material, design or glazing. Similar appearance alone does not make new double glazing exempt. Record frame profiles, glazing bars, opening method and the elevation before deciding the route.
For comfort improvements, assess repair and draught reduction alongside replacement options. Rear elevations, flats and listed buildings need their own checks.
Belsize Article 4 factsheet, June 2026 (PDF) · Belsize design guide, June 2026 (PDF)
Matching roof repairs differ from new materials, rooflights or changes to chimneys. Check the direction’s scope and the relevant elevation. Conservation-area limits on householder roof and side extensions affect the planning route; they are not a blanket ban on all work.
Householder permitted-development rights do not apply to flats. A loft or roof proposal above a flat needs the correct planning assessment and property permissions.
Belsize Article 4 factsheet, June 2026 (PDF) · GOV.UK: householder permitted development guidance
Camden’s basement Article 4 direction removes former permitted-development rights for basement excavation and lightwells. New or enlarged underground space may require impact information covering ground stability, groundwater and drainage.
Refitting an existing lower-ground room is a different scope from excavating a basement. Establish what is proposed before applying the relevant controls.
Camden basement development guidance · Camden Article 4 controls for basement development · Camden Planning Guidance: Basements, January 2021 (PDF)
Camden’s current adopted Local Plan dates from 2017. Its replacement is in examination at the time of this review. Check the council’s current policy position and the weight of any emerging policies for an application; a draft should not be described as adopted.
Use the conservation statement to understand local character, while checking current rules and guidance for the proposed work.
Camden adopted Local Plan · Camden replacement Local Plan examination news · Camden conservation area appraisals
Local guidance checked . Requirements depend on the exact address, designation, property documents and complete proposal.
Beyond the finishes
Record the features to retain and investigate the existing structure and service routes before proposing openings or a new layout. Keep any extension or excavation brief distinct from work within the existing rooms, so its design and approval needs can be assessed.
Check drainage stacks, incoming supplies, floor construction and access to common parts. Assess how proposed work affects sound transmission, fire precautions and neighbouring homes. Agree the carrying route, protection and any shared-service interruptions before work starts.
Set out waste routes, drainage falls, water pressure and the extract discharge before fixing positions. Detail the wet-area waterproofing, floor build-up, electrical layout and maintenance access. A relocated bathroom, wet room or heavy finish may need wider structural and services checks.
A practical plan for the street and building
Camden’s normal hours for noisy building work without specific authorisation are 8am–6pm Monday to Friday and 8am–1pm Saturday. Work outside those hours, on Sundays or Bank Holidays needs authorisation. Check for tighter lease, planning or building-specific restrictions, and agree the noisy phases with neighbouring occupiers in mind.
Camden noisy building work hours · LEASE: alterations and home improvements
A skip on Camden’s public road needs a licence, applied for by the skip company. A parking suspension is also needed where it occupies all or part of a parking space; skips cannot go on the pavement. Plan deliveries, waste removal and trades parking separately, keeping shared corridors and stairs clear.
Camden skip licences · Camden parking bay suspensions · LEASE: alterations and home improvements
A starting point for your budget
The flat refurbishment guide range is a starting point for discussion, not a quotation or a fixed package of inclusions. Each project needs its own measured scope and specification before pricing.
Fixed price quoted after the design is agreed
A site assessment, agreed scope and specification are needed before the work can be quoted.
Scope first assess the roof, stair and structural work before pricing
Scope first assess excavation, structure and waterproofing before pricing
Check VAT treatment, professional fees, allowances, exclusions and consent responsibilities in the written proposal. Heritage repairs, access and shared-building requirements need individual assessment; there is no automatic Belsize percentage uplift.
From an idea to a workable scope
Share the full address, property type, existing plans and photographs. Include any listing, planning or lease information you hold, plus the managing agent’s requirements where relevant.
List the rooms, priorities and features to retain. Tell us whether this is a house, flat or standalone bathroom project, whether layouts or service positions will change, and whether the home will stay occupied.
Allow for investigations, design and applicable consents as well as construction, services, fittings and finishes. Make access costs, VAT, allowances, exclusions and contingency clear when comparing proposals.
Set responsibilities, payment stages and the process for variations. Confirm access arrangements, inspections, relevant certificates and handover information before construction starts.
Our Hampstead base, serving Belsize Park
Our office is in Hampstead at Unit 3 Palace Court, 250 Finchley Road, London NW3 6DN. We serve Belsize Park from this studio.
Tell us whether you are planning a house refurbishment, flat renovation or standalone bathroom. Send the address and the changes you have in mind; let us know about any drawings, property documents or planning correspondence.
Book a feasibility visitQuestions before you begin
Yes. We provide house refurbishment, flat refurbishment and bathroom renovation in Belsize Park, including standalone bathrooms, en-suites and wet rooms. Send the address and a short description of the work to discuss the appropriate next step.
Our published Belsize Park Gardens case study records a house refurbishment with basement, extension and loft works, with photographs of the exterior during work and after refurbishment.
No. Internal alterations generally do not amount to planning development. External changes, extensions, changes of use and excavation need their own assessment. Listed-building consent, Building Regulations and lease permissions are separate checks, so assess the full proposal for the exact address.
GOV.UK: when planning permission is required · GOV.UK: Building Regulations approval · LEASE: alterations and home improvements
Use Camden’s conservation map and the relevant appraisal, then check the current Article 4 direction and affected-property map. Camden updated its Belsize Article 4 guidance in June 2026. Do not infer the restrictions from an NW3 postcode or assume every property has the same controls.
Camden conservation and planning map · Belsize Conservation Area statement · Camden heritage Article 4 directions · Belsize Article 4 direction and map, June 2026 (PDF) · Belsize Article 4 factsheet, June 2026 (PDF)
Yes. Alterations affecting a listed building’s special architectural or historic character can need consent, including changes to significant internal layouts or fabric. Check the listing and proposed work with Camden before making changes. Being in a conservation area does not itself mean the building is listed.
Historic England: listed building consent · Historic England: changing an internal layout · Search the National Heritage List for England
Check before ordering. Camden’s current Belsize guidance distinguishes matching repairs from replacement with double glazing, particularly on affected front and street-facing side elevations. A flat or listed building can bring additional requirements; the existing window details and proposed replacement matter.
Belsize Article 4 factsheet, June 2026 (PDF) · Belsize design guide, June 2026 (PDF) · Historic England: listed building consent
It depends on the lease and the work. Written landlord consent or a licence to alter may be required even if council approvals are in place. Check restrictions on alterations, floors, shared services and common parts, and agree any required permissions before starting.
LEASE: alterations and home improvements
Check the lease, structure and service routes before settling the layout. Drainage falls, shared stacks, water supply, ventilation and floor build-up affect what is practical. A new or relocated bathroom can bring approval requirements that differ from replacing existing fittings.
LEASE: alterations and home improvements · GOV.UK: Building Regulations approval · GOV.UK: work that does not need Building Regulations approval
Camden’s normal hours for noisy building work without specific authorisation are 8am–6pm Monday to Friday and 8am–1pm Saturday. Sundays, Bank Holidays and other hours need authorisation. Check the lease, planning conditions and building-specific arrangements for any tighter restrictions.
Camden noisy building work hours
Start with the property’s condition, measured scope and finish requirements. Separate investigations, design and consents from construction, services, fittings, access costs, VAT and contingency. A written scope with clear allowances and exclusions helps you compare proposals; the postcode alone cannot establish a project price.
Go deeper where it matters
Explore the scope and coordination involved in refurbishing a house.
Read moreSee apartment project examples and prepare the brief for a shared building.
Read morePlan the layout, concealed work and finishes for a bathroom, wet room or en-suite.
Read moreConsider fitted storage, kitchens and interior joinery within the refurbishment.
Read moreDevelop a focused kitchen project or coordinate it with a wider renovation.
Read moreOrganise rooms, priorities and questions before your first project discussion.
Read moreUse these area-specific guide pages to move from broad research into the main build routes people compare in Belsize Park NW3.
One team, one contract — from feasibility drawing to handover photograph. Our in-house architects, designers and structural engineers, surveying support through Hampstead Chartered Surveyors & Building Consultancy, and our own build teams, all under a fixed-price design-build contract.
View Our Belsize Park Builders PageSee how Belsize Park fits within our wider Prime North London refurbishment service — house, flat and apartment refurbishment, extensions, lofts, basements and listed work under one team.
Explore 8 service routes for Belsize Park properties, grouped by project type and delivered by the same design-build team.
We reply within one working day, Monday to Friday, 8am to 6pm.