Extension Planning Permission

At Extension Planning Permission, we provide specialist planning consultancy services for homeowners seeking professional guidance on house extension projects throughout the UK. Extension Planning Permission helps clients understand planning requirements, assess development potential, and secure the approvals needed to extend their homes with confidence.

Planning permission can be one of the most important stages of an extension project. A successful application requires more than architectural drawings alone. Local planning policies, design guidance, neighbour impacts, conservation restrictions, site constraints, and national planning legislation can all influence whether an application is approved or refused.

Extension Planning Permission works with homeowners at every stage of the process, providing expert planning advice, application management, planning assessments, and regulatory guidance to maximise the likelihood of a successful outcome.

Whether you are planning a rear extension, side extension, wraparound extension, kitchen extension, double-storey addition, garden room, or substantial home improvement project, Extension Planning Permission provides the expertise needed to navigate the planning system effectively.

Why Choose Extension Planning Permission?

At Extension Planning Permission, we understand that planning permission is often the single biggest uncertainty homeowners face when extending their property. Our role is to provide clear, informed, and practical advice that removes uncertainty and helps clients make confident decisions before investing significant time and money into a project.

Every proposal is assessed against the relevant Local Development Plan, National Planning Policy Framework (NPPF), supplementary planning guidance, conservation policies, permitted development legislation, and local authority design requirements. This policy-led approach helps identify potential issues early and creates a stronger foundation for a successful application.

Compliance plays a critical role in planning success. Extension Planning Permission ensures extension proposals are developed with consideration for planning legislation, neighbour amenity requirements, daylight and sunlight impacts, privacy considerations, highway safety concerns, heritage restrictions, environmental policies, and local design standards.

Where applicable, we also provide guidance regarding the relationship between planning approval and compliance with the Building Regulations 2010, including requirements relating to structural stability, fire safety, energy efficiency, ventilation, drainage, accessibility, and thermal performance. While planning permission and Building Regulations approval are separate processes, understanding both at an early stage often reduces delays and avoids costly design revisions.

For homeowners located within conservation areas, Green Belt locations, Areas of Outstanding Natural Beauty, or properties affected by Article 4 Directions, Extension Planning Permission provides specialist advice designed to address the additional planning controls that may apply.

How much does Extension Planning Permission Cost?

The cost of obtaining extension planning permission ranges from £300 to £5,000+.

The cost of extension planning approval services depends on the size of the extension, local authority fees, planning consultancy requirements, architectural drawings, supporting documentation, and any specialist reports required to accompany the application.

Smaller householder extension applications often cost between £300 and £1,500, including application preparation and submission support.

More complex projects, including double-storey extensions, extensions within conservation areas, and developments requiring planning statements or specialist assessments, typically range from £1,500 to £3,500.

Large bespoke extensions, planning appeals, heritage projects, and developments involving significant planning constraints may exceed £5,000, depending on the complexity of the proposal and the level of professional support required.

Because planning requirements vary between properties and local authorities, a project-specific assessment is usually recommended.

Extension Planning Permission provides free consultations and tailored quotations. Contact Extension Planning Permission today to discuss your project.

What Services does Extension Planning Permission Provide?

Extension Planning Permission offers comprehensive planning support for residential extension projects.

• Extension planning assessments – We review proposed developments against planning policies to determine planning requirements and identify potential risks.
• Planning permission applications – Our team prepares, manages, and submits extension applications on behalf of homeowners.
• Permitted development reviews – We assess whether an extension can be completed under permitted development rights without full planning permission.
• Pre-application planning advice – Early-stage assessments help establish likely planning outcomes before formal submission.
• Householder planning applications – We provide specialist support for residential extension projects of all sizes.
• Planning statements – Detailed supporting documents are prepared to strengthen applications and demonstrate policy compliance.
• Conservation area planning advice – Specialist guidance is provided for properties located within protected planning areas.
• Lawful Development Certificates – We help homeowners obtain formal confirmation that a proposed extension is lawful.
• Planning appeals – Professional representation is available where planning permission has been refused.
• Planning strategy consultancy – Strategic advice helps maximise development potential while managing planning risks.

When do You Need Planning Permission for an Extension?

Many homeowners assume all extensions require planning permission, but this is not always the case. Certain extensions can be completed under Permitted Development Rights, subject to strict size, design, and location limitations.

Planning permission is commonly required when:

• The extension exceeds permitted development limits.
• The property is located within a conservation area or protected location.
• The development significantly alters the appearance of the property.
• The property is a listed building.
• Previous planning restrictions remove permitted development rights.
• The extension creates substantial impacts on neighbouring properties.
• The project involves major structural enlargement or redevelopment.

Because planning regulations can vary significantly between properties, obtaining professional advice before commencing work is strongly recommended.

What is the Extension Planning Permission Process?

Every project begins with an initial consultation and planning review. Extension Planning Permission assesses the property, planning history, local authority policies, site constraints, and the proposed design.

Following the assessment, we provide clear advice regarding whether planning permission is required, the likelihood of approval, and any changes that could improve the proposal.

Where a planning application is necessary, supporting documentation is prepared and submitted to the relevant local authority. Throughout the process, Extension Planning Permission liaises with planning officers, responds to planning queries, and monitors application progress.

If additional information or amendments are requested by the planning authority, we work proactively to address concerns and support a positive outcome.

What Types of Extensions Can Extension Planning Permission Assist With?

Extension Planning Permission supports homeowners across a broad range of residential extension projects.

• Single-storey rear extensions – Expanding kitchens, dining rooms, and family living areas.
• Double-storey extensions – Increasing accommodation across multiple floors.
• Side extensions – Utilising underused external areas to create additional living space.
• Wraparound extensions – Combining rear and side extensions for major property transformations.
• Kitchen extensions – Creating larger, more functional kitchen and dining environments.
• Home office extensions – Dedicated workspaces designed for remote and hybrid working.
• Utility room extensions – Practical additions that improve household functionality.
• Garden room extensions – Creating flexible spaces for leisure, work, or entertainment.
• Period property extensions – Sensitive developments designed to complement traditional architecture.
• Bespoke extension projects – Tailored solutions designed around individual properties and lifestyles.

How Long does Extension Planning Permission Take?

Planning timescales depend on the complexity of the proposal and local authority workloads.

Most householder planning applications are determined within approximately 8 weeks following validation by the local planning authority.

Projects involving conservation areas, listed buildings, significant objections, or complex planning considerations may take longer.

Planning appeals can take several months depending on the appeal process and nature of the proposal.

Extension Planning Permission provides realistic timescale guidance at the outset of every project to help homeowners plan effectively.

Why is Professional Planning Advice Important?

Planning permission decisions are rarely based on drawings alone. Applications are assessed against planning policies, site-specific considerations, design standards, environmental factors, and neighbour impacts.

Professional planning advice helps homeowners understand these factors before committing to a design, reducing the risk of refusal and improving overall project viability.

A well-prepared application supported by strong planning justification, policy analysis, and professional documentation is often significantly more likely to achieve a positive outcome than a poorly prepared submission.

By engaging Extension Planning Permission early in the process, homeowners gain access to specialist expertise that can save time, reduce risk, and improve the likelihood of securing approval.

Get a Personalised Quote from Extension Planning Permission

If you are considering a house extension and require expert planning advice, planning application support, permitted development guidance, or planning appeal assistance, Extension Planning Permission can help.

Extension Planning Permission provides specialist planning consultancy services, planning assessments, application management, and regulatory guidance for homeowners throughout the UK. Contact Extension Planning Permission today to arrange a consultation and receive a personalised quotation.