Planning Permission Experts South London & Surrey
Planning permission can be one of the most challenging hurdles when renovating or extending your home. Navigating complex local council building rules, spatial policies, and extensive paperwork can quickly become stressful for homeowners.
As leading planning permission experts, Happy Building simplifies the UK planning system for you. We bridge the gap between your architectural vision and local council approval, ensuring you get the home you want without the unnecessary worry. Whether you are planning a modern kitchen extension or a loft conversion, our experienced planning consultants guide you through every stage of the process using deep local knowledge and proven expertise.
Planning Consultants for Planning Policies
Dealing with evolving local planning policies can get confusing fast. Our specialist planning consultants interpret the rules, track current updates, and monitor local council changes in Sutton, Surrey, and Southwest London to keep your residential project on track.
By breaking down the planning system and auditing your site early, we identify potential constraints before they cause delays. This proactive approach prevents costly mistakes, ensures policy compliance, and accelerates your project’s timeline.
Do You Need Planning Permission?
Not every home improvement project requires a formal householder planning application. Understanding which planning rules apply to your property before committing to construction costs is essential.
Permitted Development
Certain residential improvements, such as small single-storey rear extensions, internal reconfigurations, or specific loft alterations, may fall under Permitted Development (PD) rights. This legal framework allows homeowners to extend their properties without needing full planning consent, provided strict criteria are met.
Projects That Need Consent
Larger residential developments typically require a full householder planning application. Local planning authorities (LPAs) assess these proposals against strict regional development frameworks and design guides. These projects include:
- Double-storey extensions and wraparound extensions
- Loft conversions featuring prominent rear or side dormers
- Residential changes of use or converting flats
- Material changes to the exterior of a property
Why Planning Applications Matter
Proceeding without the correct lawful development certificates or planning approvals can result in council enforcement notices, heavy financial penalties, or a legal requirement to undo completed building work. Working with a professional planning specialist secures your investment and moves your project forward safely.
Planning Services We Offer
We provide a full suite of pre-construction and planning services across Sutton, Surrey and Southwest London. Our expert team manages all council administration, architectural technical drawings, and validation requirements.
Measured Site Survey
A measured site survey is the first step for any building project. Our team goes to your property and takes careful measurements of the house and land around it. We check how the land is set up and where nearby buildings are. These details help us make the right design drawings and planning applications. If things are not measured from the start, problems can come up later. We double-check everything to avoid mistakes.
Planning Advice
Planning advice helps you avoid being refused by the council. We talk with you about your ideas and check if your project fits the local planning policies. Our team uses their planning knowledge to spot any issues that may come up. We then suggest clear ways to get around these problems so you stay on track. With our help, you shape a plan that is simple for the council to approve. This saves you effort and time.
Planning Drawings
Planning drawings must be clear so the council knows exactly what you want to build. Our team does all the plans, including floor layouts, side views, and maps. These follow the technical rules and local planning policies. We make sure the drawings are detailed and easy to read. This helps council officers see what your project is about without confusion. Good drawings can make getting planning permission faster and make the whole process easier for you.
Planning Statement (if required)
Sometimes you need a planning statement for big projects. This document shows how your plan fits with both local rules and national planning policies. We write these statements in simple words, so the council clearly understands. If they have questions about your design or how it will impact things, we cover those points. We explain why your project should be approved. Using facts and planning system knowledge, our team makes your application look solid and complete. This gives your submission a stronger chance.
Application Form Completion
Filling out planning application forms is not easy. The terms can be hard to understand, and even small mistakes may get your application sent back or delayed. We handle all the forms and papers for you. Our team checks each part and attaches every document you need. We make sure nothing is missed. This way, your planning process does not stall over paperwork. You can feel confident everything is done right, so you do not have to worry about admin tasks.
Council Submission and Negotiations
When your application is ready, we send it to your local council. We handle all the talking with their planning officers for you. If the council has questions or wants changes, we speak with them and try to sort things out. Our team works to get your project approved, looking for solutions that meet everyone’s needs. We keep you updated at each step, so you always know what is happening with your application.
95%
of our clients say
they’d build with us again
"We started our journey with Happy Building back in 2021 when we were looking for a local architectural designer. They came up with a great design for our loft conversion and submitted final plans to the Sutton planning authority who granted us planning permission. We then went on to use their construction services to build our loft conversion and renovate our house. We are delighted with our new space. As first time renovators, we really valued the comprehensive support provided by the project team and the attention given to the details which were important to us. The trades team were all really polite and respectful. Thank you to the whole team!"
150+
granted planning approvals per year
"We decided to work with Happy Builders after a very positive discussion with their client services team. Our project was relatively simple, we wanted to complete a rear extension with open plan kitchen diner and some minor work to our master bedroom. Geo, who was our assigned architect was extremely positive and enthusiastic. He understood our needs and we felt really listened to our objectives. The work he created was good and after selecting one option, we pretty much went ahead to planning with little amends. There was some delay to obtain planning permission, but Geo kept us informed."
6 in 10
“We chose Happy Building because they provide both the design and build process, and we had seen their local projects and were impressed. Happy Building has a straightforward process — we knew exactly what was happening and when. We knew what the cost would be and there were no surprises. They were proactive in their approach to any challenges that came up — they always came with a solution. Their team were accessible, engaged, and helpful at all stages. The build has transformed our house and changed the way we live in it — it’s better than we thought it would be!”
“We were very pleased with our experience working with Happy Building, especially Geo. He designed us a range of fantastic designs, including costing them up transparently and fairly. He was patient with our differing decisions, gave really sound advice, and communicated with us promptly and clearly. We wouldn't hesitate to recommend them!”
95%
of our clients say
they’d build with us again
"Happy Building guided us from planning to build with zero stress — and stayed exactly on budget. We’d do it again in a heartbeat."
Types of Projects We Cover
We work on many types of home projects in Sutton, Surrey and Southwest London. Whether your job is small or large, simple or complex, we can handle it. Need to knock down a wall inside? Planning a big extension? We take care with every project. Every house has its own needs, and we adjust our way of working to fit yours. Below you’ll see what kinds of projects our team often manages.
House Extensions
Rear, side, wraparound, and double-storey extension projects.
Loft Conversions
Dormer, hip-to-gable, mansard, and Velux-style loft conversions.
Basement Projects
Complete excavations and basement conversions to create additional living space.
Garage Conversions
Transforming unused garages into home offices, gyms, or extra rooms.
Full Home Renovations
Interior reconfigurations, layout improvements, and modern upgrades.
Why Choose Happy Building for Your Planning System?
At Happy Building, we do more than just drawings or building. We act as your main team from start to finish. You get one group to talk to, making things easy and clear. Our goal is to finish your project without confusion and within the agreed budget. We handle the details, so you can focus on looking forward to your new space.
Our 99% Planning Approval Rate
We are proud to have a 99% planning approval rate. This did not happen by chance. We prepare our planning applications carefully and give honest feedback from the start. If we see any possible issues, we talk about them before we apply. We avoid sending in weak applications. By doing this, we save our clients time and money and prevent disappointment. When you work with us, you can feel sure your project is being handled with care.
Extensive Knowledge and Local Knowledge
We know the planning system and the local rules in Sutton and Surrey. Our planners understand what each council wants and how to show your project in a way that makes sense. Because we work in these areas often, we can spot problems before they cause trouble. We have good working relationships with many local authorities too. This helps us handle your planning application in the right way, so things move along with fewer problems.
Ongoing Support and Expert Advice
Our work is not finished after we send your planning application. We stay in touch and keep helping until you have a decision. If the council wants changes, we talk to them and update drawings. We want you to get the results you’re hoping for. If you have questions, you can always call us. We support you from your first idea until building starts, so things feel easier for you.
Start your project today
Ready to begin your project? We’re here to make the planning process simple, clear, and stress-free. Whether you’re planning a house extension, loft conversion, or full renovation, our team is ready to guide you every step of the way.
Book a free consultation today, and we’ll help you understand what permissions you need, how the process works, and what to expect from start to finish. We’ll also provide a detailed quote for your planning application and design service.
Contact us
FAQs
What is the planning inspectorate?
The Planning Inspectorate is a government agency in the UK that handles planning appeals. If your local council refuses your planning application, you can appeal to this body. They review the decision independently to see if it was fair and in line with national policies. They have the power to overturn the council’s decision and grant permission. It acts as a final check in the planning system.
What is permitted development?
Permitted development rights allow homeowners to perform certain types of building work without applying for full planning permission. These rights are set by the government and apply to many common projects like small extensions or porches. However, there are strict limits on size and location. If your project falls outside these limits, you must submit a full planning application. It is important to check these rules carefully.
How long does it take to get planning permission?
Most local authorities aim to decide on planning applications within eight weeks. This is the standard target for minor developments like house extensions. For larger or more complex projects, the timeline can extend to 13 weeks or more. If the council asks for revisions, this can also add time to the process. We monitor progress closely to keep things moving as fast as possible.
Can you guarantee approval?
No professional can guarantee 100% approval because the final decision lies with the local council. However, our 99% success rate shows that we are very good at what we do. We mitigate risks by understanding local policies and preparing thorough applications. We only advise you to proceed if we are confident in the project’s feasibility. This approach gives you the highest possible chance of success.
What happens if my application is refused?
If your application is refused, do not panic; it is not necessarily the end of the road. We will review the council’s reasons for refusal carefully. Often, we can make amendments to the design to address their concerns and resubmit a fresh application. Alternatively, if we believe the decision was unfair, we can help you lodge an appeal. We will advise you on the best next steps.
Do you send out planning appeals?
Yes, we can assist with planning appeals if your application has been unfairly refused. Our team will review the case and prepare a strong argument for the Planning Inspectorate. We handle the paperwork and represent your interests throughout the appeal process. However, we usually try to resolve issues with the council first through negotiation or resubmission. Appeals can be lengthy, so they are often a last resort.
How much does a planning application cost?
The cost of a planning application varies depending on the type of project and where you live. The local authority charges a fee for processing the application, which is set nationally. On top of that, there are fees for our professional services to prepare the drawings and documents. We provide a clear and transparent quote before we start any work. This ensures you know exactly what to expect.
Do you offer design services as well?
Yes, we offer comprehensive design services as part of our planning packages. We are not just about filling in forms; we are creators. Our in-house architectural designers work with you to bring your vision to life. We create practical and beautiful designs that are fully costed and buildable. This integrated approach ensures that your design and planning needs are perfectly aligned.
Do you offer building work as well?
Absolutely, we are a design-led construction partner. Once planning is approved, we can take your project right through to the build phase. We have a vetted network of contractors and manage the construction process for you. This means you have one team accountable from the first sketch to the final brick. It ensures a smoother project and better quality control throughout.