Getting Planning Permission in the UK: The 2026 Guide for Architects and Town Planners

Planning permission is the mechanism through which the UK regulates what gets built, where, and how. 

For architects and town planners, navigating permissions is a core professional competency, but it is also one of the most commercially significant parts of the service. Applications that succeed quickly and cleanly protect fees, relationships, and programmes themselves. 

Applications that go wrong – eat time, erode trust, and can derail projects entirely.

This post is a practical guide to planning permissions in relation to practice management. We also cover the devolved systems briefly, because Scotland, Wales, and Northern Ireland each run their own planning regimes.

What planning permission is and why it exists

Planning permission is the formal consent issued by a local planning authority (LPA) that allows a person or organisation to carry out certain types of development. 

The legal foundation is the Town and Country Planning Act 1990 (TCPA 1990), which defines “development” to include both building operations and material changes of use of land or buildings. 

Permission is generally required for any development, unless it falls within an exemption.

The purpose of the system is to balance private property rights against the public interest thus protecting heritage, landscape, and amenity. Existing infrastructure has to support new development and shape communities over the long term.

It is a quasi-judicial process: the planning officer and, ultimately, the planning committee or delegated officer, must weigh material planning considerations and reach a decision that can withstand legal scrutiny.

The legislative framework

England’s planning system rests on a layered policy and legislative structure:

• The Town and Country Planning Act 1990 is the primary statute governing planning permission, use classes, enforcement, and appeals. The act has been heavily amended, most recently by the Planning and Infrastructure Act 2025.

• The National Planning Policy Framework (NPPF) is the government’s statement of national planning policy in England. The operative version is the December 2024 NPPF, which increased housing targets, reintroduced mandatory housing land supply calculations, and expanded references to biodiversity and design quality. A further draft revised NPPF was published for consultation in December 2025 and proposes further changes around medium-sized developments and Section 106 standardisation.

• Development Plans imply the statutory development plans for any given area, against which applications must be determined under Section 38(6) of the Planning and Compulsory Purchase Act 2004, unless material considerations indicate otherwise. In practice this means the Local Plan, any Neighbourhood Plans adopted for the area, and any relevant joint or minerals and waste plans.

• National Development Management Policies (NDMPs) were introduced by the Planning and Infrastructure Act 2025, these will sit alongside Local Plans as part of the development plan and cover matters best dealt with nationally, reducing duplication across hundreds of Local Plans.

• The General Permitted Development Order (GPDO) – the Town and Country Planning (General Permitted Development) (England) Order 2015 (as amended) grants permitted development rights nationally, removing the need for a formal planning application for certain categories of work.

• Use Classes Order defines categories of use. Development that moves a building between uses within the same class is not development for planning purposes; changes between classes may or may not require permission.

Do you actually need permission for every building?

The first question on any project is whether planning permission is actually required. 

Many common works like rear extensions, loft conversions, outbuildings, solar panels, certain changes of use, all fall within permitted development rights (PDR) granted by the GPDO. These rights allow the works to proceed without a formal application, though there are limits on size, height, materials, and location.

Critical constraints on PDR:

• Property type: PDR for householder development generally applies only to dwellinghouses. Flats, maisonettes, and converted dwellings do not carry the same rights.
• Designated areas: Conservation Areas, National Parks, Areas of Outstanding Natural Beauty (AONBs, now National Landscapes), and World Heritage Sites attract restrictions on what PDR applies.
• Article 4 Directions: LPAs can issue Article 4 Directions removing specific PDR from defined areas or properties, typically to protect local character. Many urban areas have extensive Article 4 Directions removing Class E to C3 conversion rights, or householder rights in Conservation Areas.
• Previous extensions: Permitted development thresholds apply cumulatively, not per project. An extension built in 1998 counts against the limits on a 2025 addition.
• Planning conditions: Conditions on an existing planning permission can remove PDR for that property.

PDR relies on a Lawful Development Certificate (LDC) from the LPA to provide written confirmation of lawful status. In England the fee for a LDC application is the same as the equivalent planning application fee. It is not mandatory, but it is strongly advisable.

Some permitted development requires prior approval from the LPA before work begins. Prior approval is a more limited procedure but it does require submission and a formal decision. 

For instance, larger single-storey rear extensions (beyond 4m for a detached or 3m for a semi-detached or terraced house), office-to-residential conversions under Class MA, and certain telecommunications and energy installations all require prior approval.

Types of planning applications

When a full application is required, there are several types to choose between:

Householder application

Alterations or extensions to an existing dwellinghouse, or works within its curtilage (excluding outbuildings that constitute development). This is the most common type, accounting for around 52% of all planning applications in England.

Full application

All details of the proposed development are submitted from the outset: layout, scale, design, access, drainage, and any supporting assessments. The full application is required for new buildings, changes of use requiring permission, and development outside the householder category.

Outline application

Permission in principle for a development on a site, with some details reserved for later determination via Reserved Matters applications. Outline application is used for larger residential or commercial sites where the development form needs to be established before detailed design investment. Outline permission is weaker than full permission but establishes the principle.

Listed Building Consent

This type of application is required for any works to a listed building that affect its character as a building of special architectural or historic interest, including internal alterations.

Conservation Area Consent

Application for demolition of unlisted buildings in Conservation Areas.

Prior Approval

As described above, the more limited procedure for certain categories of permitted development.

Section 73 application

Used to vary or remove planning conditions attached to an existing permission without needing to submit an entirely new application. A new permission is issued if successful. As of April 2025, S73 applications attract a three-tier fee: £86 for householder, £586 for non-major, £2,000 for major.

The planning process, step by step

Stage 1: Site and policy research

Before you draw anything, you need to understand the site needs in planning policy terms. This means reading the relevant Local Plan and any neighbourhood plans, checking the LPA’s planning constraints mapping, reviewing any previous planning history on the site, and understanding what the development plan says about the uses, densities, and design standards applicable to the location.

Policy contradictions are common. A site may be in a housing allocation but also in a flood zone and adjacent to a Conservation Area. You need to build the planning case around these tensions from the outset, not retrofit around them after the design is already fixed.

Stage 2: Pre-application advice

Most LPAs offer a pre-application advice service, a formal meeting or written exchange with a planning officer before submission.

Pre-application advice is not binding. An officer’s view can shift between pre-app and decision, and personnel changes happen. But on complex or sensitive applications, engaging before submission routinely identifies issues early (like heritage concerns, ecology obligations, highways requirements, design expectations) that are far cheaper to address at design stage than through a refused application and subsequent redesign.

Pre-app fees vary considerably by LPA and application complexity. Most charge between £60–£400 for householder or minor commercial applications.

Stage 3: Preparing the application

A typical planning application requires:

• Completed application form, submitted via the Planning Portal or, where the LPA permits, directly. The Portal is preferred by most LPAs because it validates the completeness of the submission.
• Site location plan at 1:1,250 or 1:2,500 scale, with the application site edged in red and any other land in the applicant’s ownership edged in blue.
• Site/block plan at 1:200 or 1:500 scale showing the proposal in context.
• Existing and proposed floor plans and elevations, typically at 1:50 or 1:100.
• Design and Access Statement, which is required for most applications other than householder changes of use. It must address design principles, local character, and (where relevant) the access strategy.
• Supporting assessments and documents as required by the application type and site constraints: Biodiversity Net Gain plan, Heritage Impact Assessment, Flood Risk Assessment, Transport Assessment, Environmental Impact Assessment (EIA) for development likely to have significant effects on the environment.
• Community Infrastructure Levy (CIL) from where the LPA has adopted a CIL charging schedule.
• Planning fee.

Stage 4: Submission and validation

Applications are submitted online via the Planning Portal or the LPA’s own portal. 

After submission, the LPA validates the application, which can take days or, in busy LPAs, several weeks. The statutory determination period only begins once the application has been validated, not from the date of submission.

A valid application triggers formal acknowledgement and a reference number. If the LPA considers the application invalid, it must notify the applicant specifying what is missing. Incomplete submissions are one of the most common causes of avoidable delay.

Stage 5: Consultation

Once validated, the LPA publicises the application in accordance with the Town and Country Planning (Development Management Procedure) (England) Order 2015 (DMPO 2015). This involves:

• Neighbour notification letters sent to adjoining properties.
• Press notices for applications affecting Conservation Areas, listed buildings, rights of way, or major development.
• Site notices where required by the LPA or the DMPO.
• Statutory consultee responses.

The standard public consultation period is 21 days from the date of notification. 

Comments received after this period may still be taken into account at the officer’s discretion if the application has not yet been determined.

Stage 6: Assessment and decision

The planning officer assesses the application against the development plan, national policy, and other material considerations. They prepare an officer’s report recommending approval or refusal with reasons.

Decisions are made either under delegated powers or by a planning committee.

Statutory determination periods:

• Householder and minor applications: 8 weeks from validation.
• Major applications (10+ dwellings, or 1,000sqm+ commercial): 13 weeks from validation.
• Applications requiring EIA: 16 weeks from validation.

These deadlines are frequently missed. RIBA’s Future Trends survey of August 2024 found that 57% of architecture practices had experienced projects delayed by between one and six months due to LPA delays. 

For applications where the programme is critical, a Planning Performance Agreement is the most reliable tool for securing committed timescales.

If the statutory period passes without a decision, and the applicant has not agreed to an extension, the applicant can appeal on grounds of non-determination under Section 78 of the TCPA 1990.

Stage 7: Conditions, discharge, and implementation

Most planning permissions are granted subject to conditions. These may include pre-commencement conditions, pre-occupation conditions, and ongoing management conditions. 

Discharge of condition applications have their own fee (currently £86 for householder, £298 for all other development from April 2025) and their own determination timescale (8 weeks).

Planning permission lapses if development does not commence within three years of the date of the decision notice. “Commencement” means a material operation on site, i.e. actual development works. Where a permission is approaching expiry, a new application or a Section 73 application varying the time condition may be required to extend it.

Planning application fees in England (from April 2025)

Planning application fees in England were substantially restructured on 1 April 2025, with a move to annual CPI-linked indexation thereafter. 

Further fee increases are expected: the Planning and Infrastructure Act 2025 gave LPAs new powers to set their own fees locally through a variation model, with a national default schedule as the baseline.

Key fees from 1 April 2025 (further uplifted by CPI from 1 April 2026):

Application type	Fee from April 2025
Householder (single dwellinghouse)	£528
Householder (two or more dwellinghouses)	£1,043
Works in curtilage (small-scale, e.g. gates, fencing)	£262
New dwellinghouse (up to 10 units)	£578 per dwelling
New dwellinghouse (10–50 units)	£459 per dwelling
New dwellinghouse (50+ units)	£22,688 + £137 per dwelling over 50 (max £411,885)
Prior approval (no building operations)	£240
Prior approval (with building operations)	£516
Prior approval, Class E to C3 residential	£250 per dwelling
Section 73 (householder)	£86
Section 73 (non-major)	£586
Section 73 (major)	£2,000
Discharge of conditions (householder)	£86
Discharge of conditions (other)	£298
Biodiversity Gain Plan submission	£298
Planning Portal service charge	£70.33 + VAT

Fee exemptions apply for works solely for access by disabled persons, and a free re-application is permitted within 12 months of a refusal of the same or substantially similar development by the same applicant on the same site.

What happens when an application is refused

An applicant who receives a refusal has several options:

Re-submission

As noted, a free re-application is permitted within 12 months of refusal. This is often the most practical route where the reasons for refusal are clear and the application can be amended to address them. The case officer should be approached informally before re-submission to test whether the proposed changes are likely to be acceptable.

Appeal to the Planning Inspectorate

Under Section 78 of the TCPA 1990, the applicant has a right of appeal against a refusal of planning permission. The deadline for householder appeals is 12 weeks from the decision; for other appeals it is 6 months.

The Planning Inspectorate determines appeals through one of three procedures: written representations, hearings, or inquiries.

The proportion of appeals that succeed was 30% for the quarter October–December 2025.

Common reasons applications fail

Understanding why applications are refused is as important as knowing how to submit them. 

The most common grounds are:

Overdevelopment

The proposed development is considered too large for the site or the area: inadequate garden space, overbearing height or bulk relative to neighbours, excessive site coverage, etc.

Design quality

The design does not respect local character, conflicts with the National Design Guide or National Model Design Code, or fails to meet the design expectations set out in the Local Plan. Since the NPPF December 2024, design has been given greater weight as a reason to refuse permission.

Amenity impact

Overlooking, overshadowing, loss of light, or noise affecting neighbouring occupiers.

Highways and parking

Insufficient parking provision, inadequate access, or an unacceptable increase in traffic movements.

Heritage harm

Harm to a listed building, its setting, or the character and appearance of a Conservation Area that is not outweighed by public benefits.

Ecology and biodiversity

Failure to demonstrate a 10% biodiversity net gain, or unmitigated harm to protected species or habitats. Since BNG became mandatory in 2024, inadequate ecological response is an increasingly common ground of refusal.

Policy conflict

The application conflicts with a specific development plan policy (particularly site allocation, use class, or design policy) without sufficient justification.

Insufficient information

Applications refused as invalid or recommended for refusal because required supporting documents were not provided.

Many refusals stem from inadequate pre-application engagement, poor Design and Access Statements, or a failure to understand local policy, and most are preventable.

How planning permission work affects your practice commercially

For architects and town planners, planning is a major determinant of project viability, programme, and fee structure.

The RIBA Plan of Work places planning approval at the end of Stage 3 or the end of Stage 4 (for detailed design). If an application is refused, the design work done to Stage 3 or 4 may need to be substantially reworked. 

How that rework is charged depends entirely on how the initial fee was structured. Fee proposals that do not account for the possibility of refusal and redesign leave the practice exposed.

Planning could be a billable service. For town planners holding both RIBA and MRTPI credentials, planning consultancy is a distinct, billable service line. Pre-application advice, planning statements, DAS writing, appeal management, and Local Plan promotion are all services that can be charged separately and explicitly, not absorbed into stage fees.

Planning delays are the single most common cause of project programme slippage in the UK, with the associated consequences for contractor mobilisation, client cash flow, and architect resourcing. Practices that manage planning risk well protect their own reputation and their clients.

A track record of successful planning approvals is a powerful selling point and a business development asset. Clients will pay for a practice that consistently delivers approvals. This is one of the high-margin service positions available to established practices.

How PlanMan supports planning projects

PlanMan.app is a project management platform built specifically for UK architects and town planners, and the demands of the planning process map closely onto our core features.

PlanMan’s project management module lets practices structure projects in custom stages aligned to RIBA Plan of Work phases and planning milestones such as pre-application engagement, application preparation, validation, determination, and condition discharge.

You can map a project gateway framework onto the planning timeline to give principals real-time visibility.

The document management module keeps everything organised per project with version control and cloud access from the mobile app, accessible from site visits or committee meetings.

Case officer relationships, client updates on determination status, neighbour consultation queries, and third-party correspondence all need to be documented. PlanMan’s client communication module and project chat store everything against the project record with timestamps.

Complex planning applications involve multiple specialist consultants: ecologists, transport planners, heritage consultants, acoustic engineers, flood risk assessors, arboriculturists. PlanMan’s co-consultants module and permission controls let the lead architect or planning consultant coordinate those consultants through a shared project environment.

Start your free 30-day trial and see how PlanMan brings structure to the planning project lifecycle!