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Flat Renovations

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Refurbishing a flat in Britain is a legal exercise wearing a builder's jacket. Almost every flat is held on a long lease, which means the walls, floors and ceilings you propose to change are not straightforwardly yours: the lease says what you own, what the freeholder owns, and what you may do without asking. A whole-flat refurbishment - rewire, replumb, new kitchen and bathroom, new floors, reconfigured layout - touches most of those boundaries at once, which is why it is the job most likely to run into the freeholder rather than into the structure.

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The building around you constrains the work in ways a house never does. Materials arrive through a shared entrance and often a lift with a weight limit and a booking sheet. Water comes off a riser that serves other homes. Noise travels to neighbours who have their own leases and their own patience. Waste cannot sit in a communal bin store. None of that appears on a drawing, and all of it appears in the programme.

The useful order of work is therefore: read the lease, establish what consent you need and from whom, find out what the building management will and will not allow, and only then get the flat measured. A refurbishment that starts with a kitchen supplier's visit and finishes with a solicitor's letter has been run backwards.

The lease decides first: alterations consent and what happens if you skip it

Most long leases divide alterations into three bands: things you may do freely, things you may do with the landlord's written consent, and things the lease prohibits outright. Structural work, removing or forming walls, altering floors, moving a bathroom or kitchen over a neighbour's living space, changing windows and anything touching the common parts or the building's services are the items most often in the middle band, and the consent is normally documented in a licence to alter - a deed between you and the freeholder recording the approved drawings and the conditions attached. Where a lease makes consent subject to the landlord not unreasonably withholding it, section 19(2) of the Landlord and Tenant Act 1927 is the provision that does the work, and it is explained in our joinery and handyman guides rather than repeated here.

What is worth knowing is what happens if you do not ask. Section 168 of the Commonhold and Leasehold Reform Act 2002 stops a landlord under a long lease of a dwelling serving a forfeiture notice under section 146 of the Law of Property Act 1925 unless the breach has been finally determined, admitted by the tenant, or finally determined by a court or arbitral tribunal. A landlord who believes you have breached the alterations covenant applies to the appropriate tribunal - the First-tier Tribunal or Upper Tribunal for a dwelling in England - for a determination that the breach has occurred, and a notice cannot be served until fourteen days after that determination becomes final.

In practice the sanction that bites is not forfeiture but sale. A buyer's solicitor asks for the licence to alter, the retrospective consent or a deed of variation, and an unconsented alteration becomes a price negotiation or a delayed completion. Retrospective consent is usually obtainable, and almost always more expensive and slower than asking first.

Planning and building control for a flat, which are not the same as for a house

  • Flats and maisonettes have no householder permitted development rights, so external changes start from a planning application rather than from an exemption - our general contractor guide sets that out.
  • Purely internal alteration of a flat is usually a building control question rather than a planning one, unless the building is listed or you are creating an additional dwelling.
  • Dividing one flat into two, or combining two into one, changes the number of dwellings in the building and is both a planning matter and a material change of use for building control.
  • In England and Wales an application goes to a local authority building control service or a registered building control approver; Scotland uses a building warrant and Northern Ireland its own regulations.
  • Where the block is a higher-risk building under the Building Safety Act 2022, building control sits with the Building Safety Regulator rather than with your choice of body - our rendering and external wall guide explains the threshold.
  • Replacement windows in a flat are usually both a lease matter and a building control matter, and in a conservation area a planning matter as well.

Sound, fire and the services you share with people you have never met

Three technical questions dominate a flat refurbishment and all three are about the neighbours. Sound insulation between flats is governed by Approved Document E in England and Wales and is covered in our flooring guide; the practical consequence for a refurbishment is that replacing a carpet with a hard floor is the single most common cause of a complaint, and many leases deal with it expressly by requiring carpet or an approved acoustic layer.

Fire is the second. In a purpose-built or converted block, the flat entrance door and the compartment walls and floors around you are part of the building's fire strategy, not part of your interior scheme. Replacing a flat entrance door, forming an opening in a compartment wall, or running services through one are all matters to raise with the building's responsible person before anybody orders materials. The duties that fall on that responsible person under the Fire Safety (England) Regulations 2022 are set out in our joinery and handyman guides.

Services are the third. The cold water riser, the soil stack, the heating distribution in a communal system and the electrical rising main all serve other homes, and isolating any of them is a building-wide event that usually needs notice. A refurbishment programme that assumes the water can be off on a Tuesday because the plumber is free is a programme that will slip.

Running a flat refurbishment through a shared building

  • Ask the managing agent for the building's contractor rules early: permitted working hours, lift protection, parking, deliveries and whether a bond or evidence of insurance is required.
  • Agree how waste leaves the building, because a communal bin store is not a skip and fly-tipping traced back to your refurbishment is your problem as much as the carrier's.
  • Protect the common parts before the first delivery and photograph them, so that damage arguments are about evidence rather than memory.
  • Tell the neighbours in writing what is happening and roughly for how long; it is the cheapest goodwill available on any project.
  • Confirm who can isolate water, gas and electricity for the block and how much notice they need.
  • Sequence the noisy work - chasing, lifting floors, breaking out tiles - into the hours the building allows, and price the job on that assumption rather than on a full working day.
  • Keep the licence to alter, the approved drawings and every certificate together, because the next buyer's solicitor will want the whole set.

What goes wrong in flat refurbishments

The first is discovering mid-strip that the wall you planned to remove is a compartment wall, a structural wall, or both, and that the drawings the freeholder holds do not match what is actually there. Converted houses are the worst offenders, because the conversion itself may be decades old and may never have been properly recorded.

The second is water. A leak from a flat runs downwards into somebody else's home and becomes an insurance claim across two policies and two leases. Pressure testing before the floors go back, isolating properly rather than trusting a valve nobody has turned for twenty years, and being present for the first refill are all cheap compared with the alternative.

The third is time. A refurbishment in a house can absorb a bad week; a refurbishment in a flat cannot, because the constraints are external. Restricted hours, booked lifts, limited parking and a neighbour who works nights all stretch the same scope of work over a longer period, and a quotation built on house productivity will not survive contact with the building.

What drives a flat renovation quote, and how LokalMatch fits in

Prices for flat work move on access and constraint before they move on finishes. What matters is which floor you are on and whether there is a lift, how materials and waste get in and out, how many hours a day the building allows noisy work, whether the layout change is structural or cosmetic, whether services have to be isolated for the whole block, what the lease and the licence to alter require by way of acoustic treatment, and how much of the existing wiring and pipework is being kept. The same kitchen costs differently on the ground floor and on the fifth.

LokalMatch exists to make the introduction. Describe the flat once, with your postcode, what you want changed and any constraints the building imposes, and contractors who work in your area will contact you. There is no charge to homeowners; the pros pay to receive enquiries. LokalMatch does not do the work, does not set prices, and does not vet, rank or recommend the businesses that reply - references, insurance and their experience of leasehold buildings are yours to check.

Flat Renovations: frequently asked questions

Do I need the freeholder's permission to renovate my flat?

For anything beyond decoration, usually yes. Most long leases require written consent for structural work, alterations to walls, floors and ceilings, changes to services and anything affecting the common parts, and that consent is normally recorded in a licence to alter listing the approved drawings and conditions. Read the alterations clause before designing anything, because leases differ and some prohibit certain work outright rather than making it consentable.

What can the freeholder actually do if I alter without consent?

Under section 168 of the Commonhold and Leasehold Reform Act 2002 a landlord under a long lease of a dwelling cannot serve a section 146 forfeiture notice unless the breach has been finally determined, admitted by the tenant, or finally determined by a court or arbitral tribunal, and a notice cannot be served until fourteen days after such a determination becomes final. The landlord applies to the appropriate tribunal - the First-tier Tribunal or Upper Tribunal in England - for that determination. In practice the more common consequence is a problem at sale, when the buyer's solicitor asks for a consent that does not exist.

Can I take up the carpet and lay wood flooring?

Check the lease before you order anything. Many leases require carpet or an approved acoustic underlay in rooms above another flat, and hard flooring is the most common source of neighbour complaints in converted and purpose-built blocks alike. Sound insulation between flats is dealt with under Approved Document E in England and Wales, which our flooring guide covers, but the obligation that can actually be enforced against you is usually the one in your own lease.

Does a flat have permitted development rights?

No. Flats and maisonettes do not have the householder permitted development rights that apply to houses, so an external alteration starts from a planning application rather than from a national exemption. Internal work is normally a building control matter rather than a planning one, unless the building is listed or the work changes the number of dwellings, which is both a planning question and a material change of use for building control.

Why is a flat refurbishment slower than the same work in a house?

Because the constraints come from outside the flat. Permitted working hours, booked lifts, protected common parts, restricted parking, waste that cannot go in the communal store and services that cannot be isolated without notice to the whole building all stretch the same scope over more days. Ask the managing agent for the contractor rules before you accept a programme, and make sure whoever quotes has seen them.

Sources

  1. Commonhold and Leasehold Reform Act 2002, section 168 (no forfeiture notice before determination of breach)
  2. Landlord and Tenant Act 1927, section 19 (provisions as to covenants against alterations)
  3. Planning Portal: When is planning permission required?
  4. GOV.UK: Building regulations approval
  5. GOV.UK: Criteria for being a higher-risk building during the occupation phase

Written by the LokalMatch editorial team. Last reviewed 21 September 2026. How we write and check our guides

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What affects the cost of apartment renovation

Prices depend on the details of your project. We only publish price ranges when they’re backed by real LokalMatch quote data or reliable sources. Until then, here’s what usually changes the price:

  • Size and scope of the project
  • Structural changes, such as moving or removing walls
  • Plumbing, electrical and HVAC work involved
  • Finishes and materials chosen
  • Design, drawings and permits
  • Condition of the existing house once it's opened up
  • Access to the site and the timeline

How to compare renovation contractors before you hire

  • Look for a contractor who has finished projects similar in size and type to yours, and ask to see them.
  • Get a written contract with the scope, the payment schedule, the timeline and how changes will be priced.
  • Ask who will manage the job day to day and how often you'll get updates.
  • Check that they carry liability insurance and workers' compensation coverage, and that their trades are licensed where required.
  • Compare quotes on the same scope, and ask what each one leaves out.
  • For structural changes, make sure an engineer or designer is involved where needed.

Questions to ask renovation contractors before you hire

  • Who will pull the permits, and who will be there for inspections?
  • Which parts of the job will you do yourselves, and which will go to subcontractors?
  • How do you handle change orders and unexpected problems once walls are open?
  • What is the payment schedule, and what is each payment tied to?
  • Can you show me proof of liability insurance and workers' compensation coverage?
  • What warranty do you offer on your workmanship, and is it in writing?
  • Can I speak with a few of your recent clients?

Apartment renovation permits and local rules

Some apartment renovation work needs a permit or has to meet local bylaws. Rules vary by municipality, so ask your pro whether a permit is needed and who will apply for it — and check with your city or town if you’re unsure.

Permits and licensing

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