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Planning & Regulations5 min

Planning Conditions in London: Types, How to Discharge Them, and What Happens If You Don't

Planning permission is rarely unconditional. In London, most planning permissions for residential extensions, loft conversions, and refurbishments are granted subject to a list of planning conditions โ€” requirements that must be satisfied either before construction begins, before the building is occupied, or on an ongoing basis throughout the life of the development. Failing to understand, comply with, or formally discharge the conditions attached to a planning permission is one of the most common errors made by London homeowners undertaking building works โ€” and the consequences can include enforcement action by the LPA, difficulties selling the property, and potentially needing to remove or alter works that have already been completed. This guide explains the types of planning condition, how conditions are discharged (the formal process of applying to the LPA to confirm that a condition has been satisfied), what happens if conditions are not complied with, and the practical implications for London homeowners managing a planning-consented building project.

Key Takeaways

  • โœ“Planning conditions in England are governed by Section 72 of the Town and Country Planning Act 1990 (TCPA 1990) and must satisfy the planning policy tests set out in NPPF paragraph 56 โ€” they must be: necessary (without the condition, the development would be unacceptable in planning terms); relevant to planning; relevant to the development to be permitted; enforceable; precise; and reasonable in all other respects. In practice, many planning conditions attached to residential applications in London are standard "model conditions" that the LPA applies routinely to categories of development โ€” but the homeowner must still comply with each condition as written. Planning conditions are classified into three main types by when they must be satisfied: Pre-commencement conditions (conditions that must be satisfied before the development begins โ€” i.e., before any physical building works start on site). Pre-commencement conditions typically require the submission of specified information to the LPA for approval before construction can begin โ€” examples include: approval of external materials (a condition requiring the LPA to approve specific brick, render, or roofing material samples before construction starts, to ensure the extension will use materials that match the existing building or are appropriate to the conservation area); submission of a drainage scheme for approval (a condition requiring the applicant to submit detailed surface water drainage proposals for approval before construction begins, to address the LPA's concerns about surface water run-off from the new development); submission of a tree protection plan for approval (a condition requiring a tree survey and protection plan showing how protected trees will be protected during construction, to be approved before any ground works begin); submission of a construction management plan (a condition requiring the applicant to submit details of how the construction process will be managed, including working hours, delivery routes, and dust suppression measures, to be approved before construction begins). Since the Neighbourhood Planning Act 2017 (which came into force in April 2018), pre-commencement conditions in England can only be imposed with the written agreement of the applicant โ€” the LPA must notify the applicant of any proposed pre-commencement conditions and give the applicant the opportunity to accept, object, or negotiate the condition before it is imposed. In practice, this has not significantly reduced the use of pre-commencement conditions in London โ€” applicants typically accept the conditions in order to get their planning permission โ€” but it does mean that any condition of this type was accepted by the applicant (or their agent) when the permission was granted
  • โœ“Pre-occupation conditions (conditions that must be satisfied before the development is brought into use or occupied, but that can be satisfied at any time during construction) are less immediately urgent than pre-commencement conditions but must be complied with before the new room or dwelling is occupied. Examples of pre-occupation conditions include: installation of refuse storage facilities to a specified standard before occupation; provision of cycle storage before occupation; completion of highway improvements before occupation; submission and approval of a landscaping scheme, with planting to be completed in the first available planting season after occupation. Ongoing conditions (conditions that must be complied with on a continuing basis throughout the life of the development, rather than at a specific point in the construction programme) impose permanent restrictions or obligations on the use of the land. Examples include: use restrictions (a condition limiting the permitted use of a building or room โ€” for example, a condition restricting a new ground-floor extension to use as a single residential dwelling only, preventing conversion to flats or HMO use); noise controls (a condition requiring that certain pieces of plant or equipment are operated only between specified hours); lighting controls (a condition requiring that external lighting is designed to prevent light spill beyond a specified lux level at the boundary); landscaping maintenance conditions (a condition requiring that landscaping planted in accordance with an approved plan is maintained for a specified period and replaced if it dies). Ongoing conditions cannot be discharged in the same way as pre-commencement or pre-occupation conditions โ€” they continue to apply indefinitely and must be complied with at all times. A failure to comply with an ongoing condition is a breach of planning control that can be enforced at any time (there is no 4-year immunity period for breach of condition in the way there is for operational development without planning permission)
  • โœ“The formal process for discharging a pre-commencement or pre-occupation condition is the "application to discharge conditions" (also called an application for approval of details required by condition). The process involves: submitting an application on the planning portal (or directly to the borough) specifying the planning permission reference number, the condition(s) being discharged, and the supporting information required by the condition; paying the application fee (currently ยฃ43 per application, for a householder application to discharge conditions); providing the specific information required by the condition (materials samples โ€” typically described as a physical sample board or sample panels erected on site; drainage scheme drawings; tree protection plan drawings; drainage calculations; ecological surveys; or other information specified in the condition); waiting for the LPA's determination. The LPA has a target of 8 weeks to determine an application to discharge conditions. The LPA may: approve the condition discharge (issuing a formal written approval that confirms the condition has been satisfied โ€” this is the written approval you need to evidence compliance for the purpose of selling or remortgaging the property); refuse the condition discharge (where the information submitted does not adequately address the condition requirements โ€” typically requesting additional or revised information); or fail to determine within 8 weeks (in which case the applicant can appeal to the Planning Inspectorate against non-determination). The formal written approval of a condition discharge should be retained with the planning permission documents and passed to future purchasers on the sale of the property. For pre-commencement conditions, the approval must be obtained and kept on file before any construction begins on site โ€” starting construction before a pre-commencement condition is discharged means the development is being carried out in breach of condition, which is a breach of planning control
  • โœ“Non-compliance with planning conditions is a breach of planning control. The LPA has powers under the TCPA 1990 to take enforcement action against breaches of planning conditions, including: Breach of Condition Notice (BCN) โ€” a formal notice requiring the person responsible for the development to take specified steps to comply with the condition within a specified period (minimum 28 days). Failure to comply with a BCN is a criminal offence (unlike failure to comply with an enforcement notice โ€” see below โ€” which is primarily a civil matter leading to direct action). Planning Enforcement Notice (EN) โ€” a notice requiring steps to be taken to remedy the breach of condition, with a compliance period of at least 28 days. The recipient of an enforcement notice can appeal to the Planning Inspectorate within the compliance period, which suspends the notice pending the appeal. Injunction โ€” in serious cases, the LPA can seek a High Court injunction to restrain an actual or apprehended breach of planning control. An injunction can require works to stop immediately. The limitation periods for enforcement action against breach of planning condition are important: there is no specific limitation period for ongoing conditions (the LPA can take enforcement action at any time); for pre-commencement and pre-occupation conditions, enforcement action is possible at any time within 10 years of the date of the breach. This means that a homeowner who started construction without discharging a pre-commencement condition is at risk of enforcement action for up to 10 years from the date construction began โ€” significantly longer than the 4-year immunity period for building without planning permission. For the purpose of selling the property, planning conditions that have not been discharged and that are more than 10 years old may be immune from enforcement action and may therefore be treated as complied with for practical purposes โ€” but this should be confirmed with a planning consultant or solicitor before relying on it in a transaction
  • โœ“Obtaining approval for materials under a condition requiring prior approval of external materials is one of the most common condition-discharge applications in London conservation areas and for listed buildings. The condition is typically worded: "Prior to the commencement of works, samples of materials to be used in the external surfaces of the development (facing brickwork, roofing materials, render, windows, and rainwater goods) shall be submitted to and approved in writing by the Local Planning Authority." The application to discharge this condition must include: a physical sample board or sample panel erected on site (for brick samples โ€” a sample area of at least 1m x 1m of the proposed facing brickwork, laid in the correct bond pattern with the correct mortar colour and joint profile, erected on the site for the planning officer to inspect in situ); manufacturer's product literature and specifications for all proposed materials; proposed colour and finish specifications for painted surfaces, rainwater goods, and window frames; the application to discharge the condition on the Planning Portal. The LPA's planning officer will inspect the sample on site and assess whether the proposed materials are appropriate to the conservation area character or to the listed building setting. This process can take 4โ€“8 weeks, and the officer may request modifications to the proposed materials before approving the discharge โ€” for example, requiring a different brick bond, a different mortar joint colour (lime putty mortar rather than cement mortar in a conservation area), or a different window profile or colour. Beginning the external construction work before the materials condition is discharged means the development is in breach of condition โ€” and if the LPA inspects and finds that non-approved materials are being used, it can require that the non-approved materials are removed and replaced with the approved materials

Tree Protection Conditions: TPO and Pre-Application Tree Surveys

Tree protection is one of the most common subjects of planning conditions on residential planning permissions in London โ€” London has an extremely high tree canopy cover (approximately 22% by area, the highest of any capital city in Europe) and a large number of individually protected trees (covered by Tree Preservation Orders โ€” TPOs) as well as trees in conservation areas (where notice must be given before any works are carried out to any tree with a trunk diameter of more than 75mm at 1.5m height).

Tree protection conditions: A planning permission for a development near protected trees will typically include a condition requiring: (a) submission of a Tree Survey (BS 5837:2012 survey) and an Arboricultural Impact Assessment (AIA) before construction begins, identifying all trees within the "root protection area" (RPA) of the development and assessing the likely impact of the development on those trees; (b) submission of an Arboricultural Method Statement (AMS) and a Tree Protection Plan (TPP) for approval before construction begins, detailing how the trees will be protected during construction (protective fencing around the RPA, protection of root zones from ground compaction, supervision of any below-ground works within the RPA); (c) installation of the approved tree protection measures before any works start on site; and (d) retention of the tree protection measures throughout the construction period.

Consequences of non-compliance: Damage to or destruction of a protected tree (a tree with a TPO, or a tree in a conservation area that is protected by the "conservation area tree provisions") during construction (for example, by damaging roots during excavation, by parking plant on the root zone causing compaction, or by breaking branches or bark with scaffolding or materials) is a criminal offence under the TCPA 1990. The maximum penalty for damaging or destroying a protected tree is an unlimited fine. The LPA can also require the defendant to plant a replacement tree of an appropriate size and species. Tree protection conditions must therefore be taken seriously โ€” failure to implement the approved tree protection measures is both a breach of planning condition and a potential criminal offence if the unprotected works cause damage to a TPO tree.

Pre-application tree survey: On sites with mature trees close to the proposed development area, a pre-application BS 5837 tree survey (carried out by a qualified arboriculturist) should be obtained before architectural design begins. The survey will identify all trees (by species, height, spread, and condition), assess their Root Protection Areas (RPAs), and identify any trees that may constrain the design of the development. Designing the development around the tree RPAs โ€” avoiding foundations within the RPA, avoiding underground services within the RPA, and maintaining adequate clearance between the new structure and the tree trunk โ€” is far more cost-effective than attempting to modify the design after planning permission has been granted.

Section 96A Minor Material Amendments and Section 73 Variations

Where construction has begun but it becomes apparent that the approved design needs to change โ€” for example, a window size needs to be altered, a wall position adjusted, or a material changed โ€” there are two formal routes for varying a planning permission without starting a full new application:

Section 96A amendment (non-material amendment): Section 96A of the TCPA 1990 allows the LPA to approve a "non-material amendment" to a planning permission. A non-material amendment is a change that does not materially affect the approved development โ€” typically a minor alteration that makes no significant difference to the visual appearance, scale, or use of the development. Examples of non-material amendments: minor adjustments to window positions (moving a window by 300mm in any direction); minor changes to internal layout (moving a partition wall); minor adjustments to roofline profile (adding a small flat section or adjusting the pitch angle slightly). The application fee for a Section 96A amendment is currently ยฃ234 for a householder application. The LPA typically determines Section 96A applications within 8 weeks. Section 96A amendments are faster and cheaper than a new planning application and are the appropriate route for minor design changes.

Section 73 variation: Section 73 of the TCPA 1990 allows the LPA to grant a new planning permission varying the conditions of an existing planning permission. A Section 73 application is appropriate for: changes to the approved design that are more significant than a non-material amendment but less significant than a completely new application; changes to the conditions of the planning permission (for example, changing a pre-commencement condition that has become onerous to comply with); or retrospective variations to as-built developments that deviate from the approved drawings. A Section 73 application results in a new planning permission (the original permission is not revoked โ€” both permissions remain valid, and the development can be built to either the original permission or the varied permission). The new planning permission includes all the conditions of the original permission, plus the varied condition. The application fee for a Section 73 variation is the same as the fee for the original application type (ยฃ258 for a householder application as of April 2025).

Construction Management Plans and Neighbour Impact Conditions

In London, where construction works in densely built residential streets inevitably affect neighbours, the LPA frequently attaches conditions requiring the submission and approval of a Construction Management Plan (CMP) or Construction Method Statement (CMS) before construction begins. These conditions are particularly common for: basement and cellar excavations (where significant vibration and noise effects on neighbouring properties are likely); loft conversions (where scaffold may need to overhang neighbouring gardens or the public highway); extensions that require party wall works or that are near party walls; and development near sensitive uses (schools, care homes, or hospitals).

What a CMP must typically include: Hours of work (typically 8:00amโ€“6:00pm Monday to Friday, 8:00amโ€“1:00pm Saturdays, no work on Sundays or bank holidays โ€” though some London boroughs specify narrower working hours, particularly in conservation areas or near sensitive uses); a description of the works and the construction programme; details of site hoarding and safety measures; vehicle access and delivery routes (to avoid congestion and conflict with other road users); measures to control dust, mud, noise, and vibration; details of waste management and skip or aggregate delivery arrangements; contact details for the site manager and for complaints; and a procedure for dealing with unexpected archaeological finds (where relevant). Preparing and submitting a CMP that meets the LPA's requirements may require input from an acoustic consultant (for vibration and noise controls) or a specialist contractor (for demolition and excavation management). The cost of a CMP preparation is typically ยฃ1,500โ€“ยฃ4,000 depending on the complexity of the project and the level of detail required by the LPA. The CMP is a live document โ€” it should be kept on site and updated if construction methods or programme change, and any variation to the approved CMP should be agreed with the LPA in advance.

Frequently Asked Questions

Can I start building before all planning conditions are discharged?โ–ผ
For pre-commencement conditions โ€” no. Pre-commencement conditions by definition must be discharged (i.e., the specific information must be submitted to and approved in writing by the LPA) before any construction begins. Starting construction before a pre-commencement condition is discharged means the development is in breach of condition from the very first day of construction โ€” even if the breach is not discovered until later. For pre-occupation conditions โ€” yes, in the sense that construction can proceed once pre-commencement conditions are discharged; pre-occupation conditions must be satisfied before the building is occupied but can be addressed during or after the construction period. For ongoing conditions โ€” the condition applies from the start of construction (and in some cases from the date of the planning permission) and must be complied with at all times. Some planning conditions are ambiguous about when they must be satisfied โ€” if you are uncertain whether a specific condition is pre-commencement or can be discharged later, seek advice from the LPA planning officer who dealt with the application, or from a planning consultant, before starting construction.
How do I find out what conditions are attached to a planning permission for a London property?โ–ผ
Planning permission documents (including the decision notice, all conditions, and any approved plans) are public records in England and can be accessed via the relevant London borough's planning portal. Each borough's planning portal is searchable by address, planning application reference number, or applicant name. The decision notice will list all the conditions attached to the planning permission in full. For a property you are purchasing, the seller's solicitor is required to disclose all planning permissions affecting the property and to confirm which conditions have been discharged. If you are buying a property where building works have been carried out, your solicitor should provide you with: the original planning permission and all conditions; evidence of discharge of any pre-commencement conditions (the LPA's written approval letters); Building Regulations completion certificates; and any Section 96A or Section 73 amendments. If any of these documents are missing, your solicitor should either obtain them from the LPA or require the seller to obtain them before exchange of contracts.
Is it too late to discharge a pre-commencement condition after construction has started?โ–ผ
Yes โ€” technically, a pre-commencement condition cannot be "discharged" after construction has started without the works first being placed in a state of lawful compliance. If construction has started without a pre-commencement condition being formally discharged (the LPA's written approval of the submitted information), the development is technically in breach of condition. The options for regularisation at this stage are: stop construction immediately, submit the application to discharge the condition to the LPA, wait for approval, and then resume construction โ€” this is the cleanest solution but may not be practical if the works are at a critical stage; continue construction and submit a Section 73 application to vary the condition (removing or modifying the pre-commencement requirement) โ€” the success of this approach depends on whether the LPA will accept it and on the merits of the underlying information; in some cases, the LPA may issue a Planning Enforcement Notice requiring the works to stop until the condition is satisfied. The best approach in all cases is to ensure that all pre-commencement conditions are discharged before construction begins โ€” checking the planning permission conditions before mobilising the contractor is a simple and effective risk management step that is frequently overlooked.

Important Note

This guide is for general information only. Building regulations, planning rules, and legal requirements change regularly and vary by local authority. Always seek professional advice specific to your project and location. rcbGroup offers free initial consultations โ€” book your free survey.

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