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How Much is Planning Permission: Demystifying Costs in the UK

Imagine the excitement of envisioning your dream home renovation or a new extension to accommodate your growing family. You've got the perfect design in mind, but then reality hits you: the perplexing world of planning permission. You find yourself asking, "How much is planning permission going to cost me?"

10 January 2024
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Eugene Kim

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This crucial aspect of your project can be daunting, but fear not! We are here to demystify the costs of planning permission in the UK and introduce you to a reliable service provider who can help you navigate this complex journey.

Understanding the Costs of Planning Permission:

How much is planning permission going to cost? The answer varies based on several factors. Location, project size, and the type of planning application you need all influence the final expenses. It’s essential to understand these variables and plan accordingly.

At Extension Architecture, our expertise in planning permission costs shines through. With over 11 years of experience in the field, we’ve assisted countless homeowners and businesses across the UK in securing planning permissions for a wide range of projects. Our in-depth understanding of costs ensures you receive accurate estimates, saving you both time and money.
house uk
* New Build Semi-Detached Homes in Wimbledon by Extension Architecture

Our Expertise in Architectural Design and Planning Services:

When you choose Extension Architecture, you’re not just hiring a service provider; you’re partnering with a team of dedicated professionals who are committed to making your vision a reality. Our specialisation in extension architecture and planning permission services guarantees that your project aligns with local regulations and guidelines. Our seasoned architects will work closely with you to create designs that not only meet your needs but also enhance the aesthetics and functionality of your space.

But how much is planning permission going to cost, and what negative aspects might you encounter during this process? Here’s where our expertise shines even brighter. We understand that navigating the complexities of planning permission can be a challenge, with potential delays and complications. However, our team’s extensive knowledge allows us to anticipate and mitigate any hurdles that may arise. We turn these potential negatives into strengths by providing solutions that keep your project on track.

The Benefits of Choosing Extension Architecture:

Before we explain the associated costs, let’s explore the benefits of working with Extension Architecture. With over a decade of experience, we offer:

  1. Expertise: Our team boasts over 11 years of experience in the industry, ensuring that your project is in capable hands.
  1. Personalized Service: We tailor our services to meet your unique needs, ensuring that your vision is at the forefront of our designs.
  1. Cost Efficiency: We help you understand how much planning permission will cost and provide accurate estimates to fit your budget.
  1. Timely Execution: Our streamlined processes and in-depth knowledge of planning regulations help expedite your planning permission application.

What do an Architects Fees Mean?

The RIBA Plan of Work is widely considered to be the baseline of design practices in the UK, setting out how a project should be considered at every stage, from strategic definition and the preparation & briefing (RIBA Stages 0-1), Concept Design, Spatial Coordination & Technical Design (RIBA Stages 2-4, through to Manufacturing & Construction, Handover and Use (RIBA Stages 5-7). These are often split into three generalised stages – Consultancy, Planning & Construction, however, the RIBA Plan of Work establishes exactly what should be considered at each stage, fragmenting the process into 7 distinguished stages.

Of course, extending your home and building a new development of homes are projects of completely different scales, however, architecture practices are expected to implement the RIBA Stages of Work to suit each project in a unique way. However, the stages set out the core strategies every step of the way, including guidance on how to define the brief, core taks throughout the design process, information exchanges and the optimal procurement routes.

Most architects will calculate their fees anywhere from 10-12% of the estimated construction costs, which will be advised early on to avoid any scary surprises. However, here at Extension Architecture, we personalise our quotations depending on the project scope and project location. That being said, our baseline fees are as follows for your typical home extension!

Project ScopePlanning Drawing Fees
Single Storey ExtensionFrom £900
Double Storey ExtensionFrom £1150
Loft ConversionFrom £950
Flat ConversionFrom £1700
New Build / Development*POA


How much does a Planning Application Cost?

There are a variety of planning application types which each come with their individual fees, however, the some of the most common are Lawful Development Certificate applications, Householder applications & Full Planning applications. If you need help understanding what the council submission fees are for your project, speak to one of our advisors or head over to the Planning Portal's online fee calculator!

Application TypeCouncil Submission Fees
Lawful Development Certificate (Permitted Development)£193 inc VAT
Householder Planning Application£322 inc VAT
Full Planning Application (Alterations to a flat)£322 inc VAT
Full Planning Application (Single New Build)£642 inc VAT
Full Planning Application (Multiple New Build Development)*POA



In the world of planning permission in the UK, the question of "how much is planning permission going to cost" may loom large, but with the right expertise by your side, you can navigate this process with confidence. Extension Architecture, with its 11+ years of experience and dedication to your project's success, is here to turn your dreams into reality. Whatever your project goals, get in touch today to receive a free, personalised quotation and let us be your trusted partner in securing planning permission for your next project and beyond!

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Eugene Kim

Eugene Kim, Founder and Managing Director of Extension Architecture, has led the firm for over 14 years, consistently delivering quality solutions. His dedication has been key to the company's growth and success.

Steph Fanizza, Architectural Design & Team Manager

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