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High Barnet and Monken Hadley EN5 · Bathroom renovation

Bathroom renovation in High Barnet and Monken Hadley

Listed interiors and bathroom consents in High Barnet

A bathroom here may sit in a listed house, a villa divided into flats or a flat above a business. Barnet’s planning register shows listed building consent granted for bathroom work on Hadley Green Road and on the High Street, and the Monken Hadley appraisal of 2007 records panelling, fireplaces and the remains of an older dwelling inside some listed houses, the fabric that new pipes and wiring have to work around.

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Serving High Barnet and Monken Hadley from our Hampstead studio · NW3 6DN
020 7101 3168

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Bathroom renovation in High Barnet and Monken Hadley at a glance

Two listed building consents on Hadley Green Road show what a bathroom change in a listed house can involve. In 2023 Barnet granted consent, with conditions, for renovation works at a listed house whose internal works included new services, kitchens and bathrooms, alongside the reinstatement of chimneypieces and joinery, a reordering of some rooms and the removal of suspended ceilings. In 2022 it granted consent, with conditions, at a different listed house for refurbishing all the windows and replacing the rear bathroom window, with replacement sockets, switches and door handles and changes to lighting. If your bathroom is in a listed building, ask Barnet early whether yours needs consent too.

Barnet planning register: public access search (planning, building control and licensing)

For the whole area, including conservation areas, permissions and working hours, read our High Barnet and Monken Hadley renovation guide.

Approved guide prices

What does a bathroom renovation cost in High Barnet and Monken Hadley?

A typical bathroom renovation in High Barnet and Monken Hadley costs £10,000–£30,000 excluding VAT. The final price depends on the scope, the specification and the complexity of the room, and a fixed written price follows the visit and the design.

Scope of workTypical cost
Typical bathroom renovation£10,000–£30,000

The figure excludes VAT. A standalone bathroom gets its own room-specific quotation; try the cost calculator for a first figure.

The buildings

Listed houses and old fabric behind the walls

Planning Data and Barnet’s appraisals show how many listed buildings a search of the ward returns and what some of them contain. A new bathroom has to find its route through that fabric.

Planning Data’s search returns 94 listed building records intersecting Barnet’s High Barnet ward. Its first page of results alone lists buildings on Wood Street such as Nos. 10, 15, 18, 27 and 30, and 47 and 49 Wood Street. Planning Data also lists 19-25 Wood Street, Grade II, which the Wood Street appraisal of 2007 describes as late 18th or early 19th century, stuccoed, with a slate roof and plain overhanging eaves. If your address is in that search, read its list entry before planning bathroom work.

Planning Data: listed buildings intersecting Barnet’s High Barnet ward · Planning Data: 19-25 Wood Street, Grade II, list entry 1359099 · Barnet: Wood Street Conservation Area Character Appraisal Statement, adopted July 2007 (PDF)

The Monken Hadley appraisal’s list of listed buildings records interiors as well as fronts. At Hadley Hurst on Hadley Common, built in 1707, it says a modern alteration must have changed the internal planning, notes that the original central doorway is now indoors, and records original features including a panelled stair hall with three turned balusters to each step and worthwhile fireplaces and doors. At Pymlicoe House on Hadley Green West, a late 18th-century house stuccoed around the mid-19th century, the remnants of a much older dwelling, perhaps 16th century or earlier, lie at its heart.

Barnet: Monken Hadley Conservation Area Character Appraisal Statement, adopted January 2007 (PDF)

A bathroom refit can bring a window change with it. In 2024 Barnet granted householder permission, with conditions, at a house on St Albans Road for changes to its windows that included a new high-level window in the rear bathroom and the replacement of uPVC windows and doors with timber, and internal alterations including the removal of the ground-floor and first-floor chimney breast, among other works. Decide early whether your bathroom needs a new or altered window, because that may bring the outside of the house into an application.

Barnet planning register: public access search (planning, building control and licensing)

Permissions and local rules

Checks for a bathroom in High Barnet and Monken Hadley

Upper floors of listed High Street buildings

In 2025 Barnet granted both planning permission and listed building consent, with conditions, for works at Ye Olde Mitre Inne on the High Street, listed as The Mitre Public House, that included first-floor alterations creating, among other rooms, a WC and bathroom and a kitchen. Barnet’s Local Plan states that consent is needed for alterations, and some repairs, that would affect a statutory listed building’s special interest, so ask Barnet whether a new bathroom on a listed upper floor needs it.

Barnet planning register: public access search (planning, building control and licensing) · Barnet Local Plan 2021–2036, adopted 4 March 2025: the plan and its adoption documents

Soil and vent pipes on a front wall

Householders have a national permitted development right to install, alter or replace a chimney, flue or soil and vent pipe on a house, but on article 2(3) land, which includes conservation areas, it does not extend to one on any wall or roof slope fronting a highway that forms the principal or a side elevation. In the Monken Hadley and Wood Street conservation areas, run a new soil and vent pipe up a rear wall where you can, and ask Barnet whether planning permission is needed at your address.

legislation.gov.uk: GPDO 2015, Schedule 2 Part 1, Class G: chimneys, flues and soil and vent pipes on a dwellinghouse

Certified electrical and other work

GOV.UK explains that tradespeople registered with a competent person scheme, electricians among them, can certify their own work as complying with building standards, notify the local authority for you where that is needed, and issue a certificate that will later show up in solicitors’ searches when the home is sold. File those certificates with the listed building consent or lease approval for the room, so that each part of the job has its own record.

GOV.UK: building regulations approval, use a competent person scheme

If Barnet Council is your landlord

In that case, Barnet Homes’ leasehold guidance lists bathroom renewal, a new en suite or turning a bathroom into a wet room among the works it may consent to where the lease allows. Re-tiling may be agreed, provided access to communal services, for example panels, ventilation ducts and service pipes, is kept, and the leaseholder must get an asbestos survey before work starts. Aesthetic, non-intrusive jobs such as new taps need no permission; replacing a boiler or any electrical work is an alteration and needs Barnet Homes’ written consent.

Barnet Homes: guidance on making alterations to leasehold properties, October 2021 (for Barnet Council leaseholders)

Working hours, skips, parking and the conservation area maps for the whole area are in our High Barnet and Monken Hadley guide. Local guidance checked ; requirements depend on the address, the building and the complete proposal.

What the work covers

What a bathroom renovation here can involve

Routes for waste and water

We trace the existing stack and the fall available from the bathroom before the layout is fixed, and keep new waste runs inside the building wherever we can. In a listed house, the route is planned around panelling, floors and timbers that may be part of its special interest, and opened up only where the drawings say.

Air, heat and electrics

Extract fans are ducted to an outlet placed with the elevations in mind, preferably at the back of the building, and heated rails and lighting are positioned away from the wettest zones. Electrical work in the room is done by an installer who can certify it, so the paperwork is ready at handover.

Waterproofing and finishes

Floors are prepared and tanked before tiling, and timber floors are stiffened where needed so that tiles and stone do not crack. In a flat, the waterproofing is designed with the home below in mind, and access panels are kept to any pipes that serve more than one home.

How we work

How we run a High Barnet and Monken Hadley bathroom renovation

  1. Visit

    We see the room, trace where the stack runs, and check which floor it is on and what lies beneath.

  2. Survey

    The drainage falls, the extract route and the floor build-up at the door are measured before a layout is drawn.

  3. Design

    The layout, waterproofing and storage are drawn; where a floor or wall changes, our own architects and structural engineers design it.

  4. Price

    You receive a fixed written price once the design and fittings are agreed.

  5. Installation

    The dates, and any days without a working bathroom, are agreed before work starts.

  6. Handover

    Testing, then care notes for the finishes and fittings. Completed work carries a 12-month defects-rectification period under the JCT contract terms.

Real projects, clearly located

Examples of our bathroom renovation work elsewhere in London

None of these projects is in High Barnet and Monken Hadley. Each card names where the work was done, so you can judge the finish and the approach before you brief your own.

Your brief

Before you ask for a quotation

  1. Tell us about the building

    Say whether the bathroom is in a house, a converted building or a flat, whether the building is listed, and which floor the room is on. A copy of the list entry, if there is one, helps us plan routes for pipes and cables from the start.

  2. Sketch the room as it is and as you want it

    Mark where the bath or shower, basin, WC and window sit now and where you would like them, with the position of any stack you can see inside or outside. We check the drainage and the ceiling below from that sketch.

  3. Gather consents and certificates

    If Barnet Council is your landlord, get Barnet Homes’ alteration application form early. Otherwise collect any earlier listed building consents, building control certificates and the lease terms on wet rooms, floors and access to shared pipes.

Ready to take the next step? Send the address and a short outline of the work.

Book a free feasibility visit

Questions before you begin

Bathroom renovation in High Barnet and Monken Hadley: questions

Will you renovate just a bathroom in High Barnet or Monken Hadley as a standalone job?

Yes. A standalone bathroom, en suite or shower room is welcome on its own, whether it is in a listed house, a villa divided into flats or a flat above a business. We survey the room and its drainage, design the layout, handle the consents and certificates the work needs, and then fit and finish the room.

Is a bathroom window judged like a bedroom window?

Not for the guidance on where windows go, in Barnet’s view. With its 2026 design guidance Barnet published a consultation statement saying that bathrooms, on reflection, do not count as habitable rooms under the definitions in Table 9 of its Local Plan, so the guidance on siting habitable-room windows should not include them. Obscured glass is still sensible wherever a bathroom window looks towards a neighbour.

Barnet: consultation statement published with the Sustainable Design and Development Guidance SPD, 2026

Can I get help to adapt a bathroom to someone’s needs?

Barnet’s page on adapting your home points to routes including help from the Barnet Care and Repair Agency in finding a builder and supervising the works, and a Disabled Facilities Grant to pay for the work, where the work is needed to make a home suitable for someone’s needs. Where you rent from a housing association, the association will normally fund the adaptation, and any support from the council rests on an assessment of your needs.

Barnet: adaptations to your home

Who owns the pipes behind a council flat’s bathroom?

If Barnet Council is your landlord, Barnet Homes’ lease page splits the pipework two ways: pipes, drains, cisterns, tanks, wires and ducts that serve only your flat are yours, while pipes running through your flat that serve more than one home belong to the council as freeholder. Find out which is which before a bath or WC is moved, because the shared ones are the council’s.

Barnet Homes: your lease (for Barnet Council leaseholders)

Does Barnet’s guidance affect where a bathroom goes in a converted building?

Barnet’s 2026 design guidance asks, as far as practical, that bedrooms in one home are not stacked over or under the living rooms, kitchens or bathrooms of homes on other floors, and, where possible, that bedrooms do not sit beside those rooms in a neighbouring home. When a converted villa or town-centre building is reorganised, place bathrooms with the flats above, below and beside in mind.

Barnet Sustainable Design and Development Guidance SPD, adopted 15 June 2026: Part 2, design and technical guidance

How much does a bathroom renovation cost in High Barnet and Monken Hadley?

A typical bathroom renovation in High Barnet and Monken Hadley costs £10,000–£30,000 excluding VAT. The final price depends on the scope, specification and complexity of the project. We give a fixed written price after the visit and the design.

Book a free feasibility visit

Talk to us about your High Barnet and Monken Hadley bathroom

Tell us the address and what you want to change in your High Barnet and Monken Hadley bathroom. We reply within one working day, Monday to Friday, 8am to 6pm.

Or call 020 7101 3168. We serve High Barnet and Monken Hadley from our studio at Unit 3, Palace Court, 250 Finchley Road, London NW3 6DN.

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