Prior Approval Planning Application

Navigating the complexities of the UK planning system requires a precise understanding of the different pathways available for development. A prior approval planning application is a statutory procedure that allows certain types of development to proceed without a full planning application, provided the local planning authority (LPA) confirms that specific aspects of the proposal meet national requirements. This process is rooted in permitted development rights, offering a streamlined alternative for residential and commercial projects that fall within defined categories of the General Permitted Development Order (GPDO).

While often perceived as a “lighter” version of planning, the prior approval process is governed by rigid technical criteria and strict statutory timeframes. Failure to adhere to these nuances can result in enforcement action or the loss of development rights. At Approved Planning, we provide the technical oversight necessary to ensure your submission is robust, mitigating the risk of refusal and securing the legal certainty required for high-value investments.

Key Takeaways

• Prior approval is a mandatory formal submission for specific permitted development projects, including larger home extensions and change of use.
• It focuses on specific material considerations such as transport impacts, flood risks, and design, rather than the principle of development.
• The process typically benefits from a statutory 56-day determination period, providing greater certainty for project timelines.
• A prior approval planning application must be submitted and approved before any physical works commence on-site.
• Detailed technical reports, such as site feasibility assessments and noise impact studies, are often required to support the application.
• If an LPA fails to notify the applicant of a decision within the statutory timeframe, “deemed consent” may apply in certain circumstances.

What is a Prior Approval Planning Application?

A prior approval planning application is a formal request to a local authority to verify that the details of a proposed development are acceptable under permitted development legislation. Unlike a full planning application, where the principle of development is debated, the principle is already established by national law. The council’s role is limited to assessing specific impacts defined by the GPDO, such as highways safety, contamination, or neighbouring amenity.

This mechanism was designed to reduce the administrative burden on both developers and local authorities. However, the technical burden of proof remains high. Applicants must demonstrate that their proposal fits strictly within the parameters of the relevant “Class” of permitted development. For example, converting an office to residential use (Class MA) requires rigorous evidence regarding natural light and noise insulation to satisfy the prior approval criteria.

Common Uses for Prior Approval

The scope of prior approval has expanded significantly in recent years, reflecting the government’s drive to repurpose existing buildings and densify urban areas. We frequently manage applications for:

• Larger Home Extensions: Single-storey rear extensions between 3m and 6m (terrace/semi) or 4m and 8m (detached).
• Change of Use: Converting commercial, business, and service buildings (Class E) into residential dwellings (Class C3).
• Agricultural to Residential: Often referred to as “Class Q” conversions, allowing barns to be transformed into homes.
• Additional Storeys: The construction of new flats on top of existing purpose-built blocks or terrace houses.
• Demolition: The complete removal of certain buildings to facilitate redevelopment.

The Legal Framework: GPDO and Permitted Development

The Town and Country Planning (General Permitted Development) (England) Order 2015, as amended, serves as the legal foundation for prior approval. This legislation grants “blanket” permission for various types of development, but attaches conditions that require the developer to seek the council’s “prior approval” before starting. This ensures that while the government encourages development, local impacts are still managed by professionals.

It is a common misconception that permitted development means “no planning required.” In reality, a prior approval planning application is a formal legal process. If you proceed without this approval, the development is technically unauthorised and could be subject to a Planning Enforcement Notice. We strongly advise clients to secure a formal decision notice or a Lawful Development Certificate to protect their asset’s value during future property transactions.

Table 1: Comparison of Planning Application Types

Feature	Prior Approval Application	Full Planning Application
Scope of Assessment	Limited to specific GPDO criteria (e.g., transport, flooding).	Broad assessment of all material considerations and local policies.
Principle of Development	Pre-established by national legislation.	Must be justified against the Local Plan.
Statutory Timeframe	Typically 42 to 56 days.	8 weeks (minor) or 13 weeks (major).
Public Consultation	Required for specific impacts (e.g., neighbour amenity).	Full public consultation always required.
Appeal Rights	Yes, if refused or not determined in time.	Yes, if refused or not determined in time.

Navigating the 56-Day Rule

One of the most significant advantages of a prior approval planning application is the statutory time limit imposed on the local authority. For many classes of development, the council has exactly 56 days to issue a decision. If they fail to provide a written notice of their decision within this window, the developer may, in specific cases, gain “deemed consent” to proceed.

However, relying on deemed consent is a high-risk strategy. The 56-day clock only starts when a “valid” application is received. If the council subsequently argues the application was missing a specific fee or a site feasibility report, the clock may never have started. We work meticulously to ensure every submission is “validation-ready” from day one, preventing procedural delays that could jeopardise your project timelines.

Material Considerations in Prior Approval

When an LPA reviews your application, they are legally restricted to looking at specific factors. These are known as the prior approval matters. Depending on the project, these may include:

• Transport and Highways: Ensuring the development does not create dangerous traffic conditions or insufficient parking.
• Contamination Risks: Investigating whether the land is safe for the proposed new use, particularly for residential conversions.
• Flood Risk: Assessing the impact of the development in areas prone to surface water or river flooding.
• Noise Impacts: Ensuring future residents are not adversely affected by existing commercial noise sources.
• Design and External Appearance: While less restrictive than full planning, the council can still influence the aesthetic impact of the proposal.
• Adequate Natural Light: Mandatory for all new residential units created via permitted development.

The Technical Submission Process

A successful prior approval planning application requires more than just a set of floor plans. It demands a comprehensive technical package that addresses every potential point of friction. At Approved Planning, we coordinate with specialist consultants to provide the necessary evidence, ensuring the council has no grounds for refusal on technicalities.

Stage 1: Feasibility and Constraints Mapping

Before submission, we conduct a thorough site feasibility assessment. We check for “Article 4 Directions,” which are local restrictions that strip away permitted development rights in specific areas. We also verify if the building is a Listed Building or located within a Conservation Area, as these designations often negate the prior approval pathway.

Stage 2: Drawing and Document Preparation

Precision is paramount. We prepare site location plans, block plans, and existing/proposed elevations that meet national validation standards. For change of use projects, we often include a Planning Statement that explicitly maps the proposal against the requirements of the GPDO, effectively writing the officer’s report for them.

Stage 3: Submission and Liaison

Once submitted via the Planning Portal, we monitor the prior approval planning application closely. We handle all correspondence with the case officer, addressing any queries regarding bin storage, cycle parking, or amenity space. Our goal is to secure a positive decision notice within the 56-day window, providing you with the legal green light to build.

Commercial to Residential: The Class MA Opportunity

Since its introduction, Class MA has become a vital tool for property developers. It allows for the conversion of Class E (commercial, business, and service) units into residential dwellings. This is a highly efficient way to unlock value in redundant high-street assets. However, the prior approval planning application for Class MA is particularly rigorous.

The building must have been vacant for at least three continuous months before the application, and it must have been in Class E use for at least two years. Furthermore, the total floor space to be converted cannot exceed 1,500 square metres. We provide strategic guidance on these thresholds, ensuring developers do not commit capital to projects that do not meet the strict eligibility criteria.

Residential Extensions: The Neighbour Consultation Scheme

For homeowners, the most common prior approval planning application is for larger rear extensions. Under this scheme, the council notifies immediate neighbours of your proposal. If a neighbour objects, the council will then assess the impact of the extension on the amenity of the adjoining properties, focusing on issues like overshadowing or loss of privacy.

If no neighbours object, the council is often obliged to grant prior approval, provided the dimensions comply with the GPDO. If objections are received, our expertise in material considerations becomes essential. We can often negotiate minor design changes or provide daylight/sunlight assessments to prove that the neighbour’s concerns are not legally sufficient to warrant a refusal.

Risk Mitigation and Common Pitfalls

The perceived simplicity of the prior approval route often leads to complacency. In our experience, many applications fail because the applicant treats the process as a mere notification rather than a formal legal hurdle. Below are the primary risks associated with a prior approval planning application:

• Article 4 Directions: Local authorities can remove permitted development rights without warning. We monitor these changes to ensure your site remains eligible.
• Condition Compliance: Prior approval is often granted subject to conditions (e.g., submitting a construction management plan). Failing to discharge these conditions can invalidate the entire permission.
• Definition of “Abandoned” Use: If a building has been empty for too long, the council may argue its use has been “abandoned,” making it ineligible for permitted development change of use.
• Structural Integrity: For barn conversions (Class Q), the works must be a conversion, not a rebuild. If the original structure is too weak, the application will be refused.

By engaging us to manage your prior approval planning application, you benefit from a proactive approach. We identify these risks during the site feasibility stage, allowing us to pivot to a Full Planning Application if the prior approval route is blocked or strategically disadvantageous.

Advanced Insights for Professional Developers

For those managing larger portfolios, the interaction between different classes of permitted development can be highly lucrative. For instance, it may be possible to combine a change of use via prior approval with an additional storey extension under a separate prior approval class. This “stacking” of rights requires a sophisticated understanding of UK planning law to ensure one approval does not accidentally negate the other.

We also advise on the Community Infrastructure Levy (CIL) implications of prior approval. While the process is faster, it is still a “chargeable development.” Failure to submit a CIL Assumption of Liability form before work begins can result in heavy surcharges, even if the development is otherwise lawful. Our holistic approach covers both the planning and the financial compliance of your project.

Cost Considerations and Fees

The application fees for prior approval are generally lower than those for full planning applications, though they vary depending on the specific class of development. For example, a larger home extension currently carries a fee of approximately £120, whereas a major commercial conversion can cost significantly more. These fees are set nationally and are subject to periodic updates by the government.

Beyond the application fee, you should budget for professional fees. Investing in high-quality architectural drawings and technical reports (such as a Phase 1 Contaminated Land Survey) is essential. A well-prepared prior approval planning application reduces the likelihood of a refusal, which ultimately saves money by avoiding the costs of an Appeal or a resubmission.

Case Study: Office to Residential Conversion

A client approached us with a vacant 1980s office building in a secondary town centre location. The goal was to create 12 luxury apartments. The site was subject to an Article 4 Direction that restricted certain types of conversion, but our analysis confirmed the direction did not apply to Class MA in this specific zone.

We managed the prior approval planning application, coordinating a transport statement to address concerns about parking and a noise assessment to mitigate the impact of a nearby railway line. By providing the council with a comprehensive evidence pack, we secured approval within 52 days. This allowed the developer to secure financing and begin construction months earlier than a full planning route would have permitted.

Frequently Asked Questions

Can I start work while the application is being processed?

No. You must wait for a formal decision notice from the council, or for the statutory time limit (usually 56 days) to pass without a decision being issued. Starting work prematurely is a breach of planning control and can lead to the refusal of your prior approval planning application on procedural grounds.

What happens if my prior approval application is refused?

If your application is refused, you have two primary options: submit a revised prior approval planning application addressing the council’s reasons for refusal, or lodge an Appeal with the Planning Inspectorate. We can assess the refusal notice to determine which route offers the highest probability of success.

Does prior approval last forever?

No. Most prior approvals come with a time limit for completion, typically three years from the date of the decision. Furthermore, the underlying legislation (the GPDO) can change. If the law changes before you have substantially completed the work, your development rights might be affected.

Is a Lawful Development Certificate the same as Prior Approval?

No. Prior approval is a request for permission before you build. A Lawful Development Certificate (LDC) is a legal document confirming that a completed development (or a proposed one that doesn’t need prior approval) is lawful. We often recommend obtaining an LDC after securing prior approval to provide absolute certainty for future buyers.

Do I need to tell my neighbours about the application?

For most residential prior approvals, the local authority is responsible for notifying your immediate neighbours. They are given 21 days to comment. For commercial changes of use, the council usually posts a site notice near the property. While you aren’t legally required to speak to neighbours yourself, doing so can often prevent unnecessary objections.

Can the council ask for more information after I’ve submitted?

Yes. If the case officer believes the information provided is insufficient to assess the prior approval matters, they may request additional reports. This is why we advocate for a front-loaded approach—submitting all potential requirements (like a Flood Risk Assessment) at the outset to keep the 56-day clock running.

Are there restrictions on the quality of homes built via prior approval?

Yes. In recent years, the government has introduced mandatory Nationally Described Space Standards and requirements for adequate natural light in all habitable rooms. Your prior approval planning application must demonstrate that the proposed dwellings meet these quality benchmarks, or it will be refused.

Strategic Advice for Your Project

A prior approval planning application represents a powerful opportunity to bypass the subjective nature of the traditional planning system. However, it is a technical exercise that leaves no room for error. The binary nature of the GPDO means your project either complies fully or it does not; there is very little “middle ground” for negotiation compared to a full planning application.

We act as your strategic partner, ensuring that every detail—from the height of a roof ridge to the lux levels in a bedroom—aligns with the legal requirements. Our role is to provide the bridge between your vision and the council’s approval, giving you the confidence to move forward with your development plans. Contact us today to discuss your site’s potential and secure the professional representation your project deserves.