Planning
Planning & Permitted Development for Extensions
We provide expert guidance on all aspects of planning permission and permitted development for home extensions. Our team supports you through the entire process, ensuring your project is compliant, well-structured, and designed for approval from the very beginning.
Every extension project is different, and the type of approval required depends on your property, location, and the scale of the proposed work. We help homeowners understand these requirements clearly so they can move forward with confidence and avoid unnecessary delays.
Planning Permission vs Permitted Development
When extending a home, there are two main routes for approval: planning permission and permitted development rights. The correct option depends on the type of extension and the specific regulations that apply to your property.
- Planning Permission is typically required for larger or more complex extensions, or when significant changes are made to the structure or appearance of a home. Approval is granted by the local authority following a formal application process.
- Permitted Development allows certain types of home improvements and extensions to be carried out without a full planning application, provided they meet specific conditions and limitations set by local regulations.
Understanding the difference between these two options is essential for ensuring your project starts smoothly and complies with all legal requirements.
What is Permitted Development?
Permitted development refers to a set of rights that allows homeowners to carry out certain types of extensions without applying for full planning permission, as long as the project meets specific criteria.
In most cases, these rights apply to standard residential houses, but they may not apply to apartments, listed buildings, or properties located in designated or protected areas. Restrictions may also vary depending on the size, height, and positioning of the extension.
When your project qualifies under permitted development, it can significantly reduce approval time and simplify the overall process, making it a faster route to extending your home.
Frequently Asked Questions
Prior Approval is a simplified planning process that may apply to certain types of home extensions or conversions under permitted development rights. It allows homeowners to proceed with work without full planning permission, provided the proposal meets specific conditions and does not negatively impact neighbouring properties.
In some cases, nearby property owners are notified and given the opportunity to raise concerns. If no objections are made, approval may be granted quickly. If objections are received, the local authority will assess the application in a similar way to a standard planning permission review.
Planning permission is required when a proposed extension does not fall within permitted development rules or exceeds the allowed limits for size, height, or design.
Each application is reviewed by the local authority, considering factors such as local planning policies, surrounding properties, and overall design impact. These rules can vary depending on location, meaning every project is assessed individually.
At NMP Building Solutions, we provide guidance based on experience with similar projects and help you understand what is likely to be approved before work begins, reducing uncertainty and delays.
A Party Wall Agreement is required when building work affects a shared wall or is carried out close to a neighbouring property boundary.
This process involves serving notice to adjoining property owners, who may agree or appoint a surveyor to review the proposed works. A formal agreement (Party Wall Award) outlines the condition of neighbouring properties before work begins and helps prevent disputes during construction.
The homeowner is generally responsible for surveyor costs, and all agreements must be in place before construction starts to ensure compliance with legal requirements.
If your property is leasehold or part of a shared ownership arrangement, you may need a License to Alter before carrying out any structural changes.
This approval is usually granted by the freeholder or managing authority and depends on the terms outlined in your lease agreement. The process can take time, so it is important to review requirements early in the planning stage.
We always recommend seeking legal or professional advice before finalising designs to avoid delays later in the project.
In some cases, approval may be required if construction work takes place near public drainage systems or utility infrastructure.
This ensures that any proposed extension does not interfere with existing pipes or services. A review of drainage and services is usually carried out before construction begins to confirm whether additional permissions are needed.
If required, applications are submitted to the relevant authority, and we guide homeowners through the process to ensure everything is handled correctly and in compliance with regulations.
