Do I Need Planning Permission for a Conservatory? Your Simple Guide

Adding a conservatory to your home is a big decision - and one of the first questions people ask is whether they need planning permission. The honest answer? It depends.

Every property is different. Your local council is the only authority that can give you a definitive answer, and we'd never want to steer you wrong by guessing. That's why we work with our trusted planning partner, Homz, who can review your specific situation and give you the proper legal advice you need.

What we can do is walk you through how the process works, what the key factors are, and what to expect - so you go into it feeling confident.

 

1. Why there's no one-size-fits-all answer

Planning permission for a conservatory isn't a yes or no question with a universal answer. It comes down to a combination of factors specific to your property, your location, and what you're planning to build.

Two houses on the same street can get completely different answers. That's just how planning works in the UK - and it's why getting proper advice for your specific situation is so important.

2. What councils look at

When a council reviews a conservatory application, there are several things they typically consider. These include:

• The size of the conservatory - both the footprint and the height

• How much of your garden it will cover - there are often limits on what percentage of your outdoor space can be built on

• Where it sits on your property - whether it faces the road, a side boundary, or the rear of your home makes a difference

• Your boundary distances - how close it sits to fences, walls, and neighbouring properties

• The existing size of your home - whether extensions have been added before

• Whether you're in a conservation area or AONB - stricter rules apply in protected areas

• Whether your home is listed - listed buildings almost always require additional consent

• Whether it's attached or freestanding - attached structures are more likely to require formal approval

None of these factors on their own will give you the answer - it's the combination of all of them together that matters.

3. A word on Permitted Development

You may have heard the phrase "Permitted Development rights." This is a government allowance that lets homeowners carry out certain building works without needing to go through a full planning application - and some conservatories fall within it.

But - and this is important - Permitted Development rules have conditions, limits, and exceptions. They can also be removed by your local council in certain areas. Whether your conservatory qualifies is something only a qualified professional can properly assess.

Our partner Homz can help you understand whether Permitted Development applies to your project.

4. What the process looks like

If you do need to apply for planning permission - or want to get it confirmed that you don't - here's a general idea of what the process involves:

Step 1 - Get proper advice first

Before you do anything, speak to a planning specialist. This is the step most people skip, and it's the one that saves the most headaches later. Homz can review your property and plans and tell you where you stand.

Step 2 - Pre-application enquiry (optional but useful)

Some homeowners choose to submit a pre-application enquiry to their local council before making a formal application. This is an informal way of gauging the council's view before committing to a full submission. Not all councils offer this, and there's usually a small fee.

Step 3 - Prepare your application

A planning application typically requires:

• Site plans and floor plans showing the proposed conservatory

• Elevation drawings showing how it will look

• A completed application form

• The application fee

Step 4 - Submit to your local council

Applications are submitted to your Local Planning Authority (LPA) - this is your local council. Once submitted, it's validated and a decision period begins.

Step 5 - The decision period

For most householder applications, councils aim to make a decision within 8 weeks. During this time they may consult neighbours and other parties. You may be asked to provide additional information.

Step 6 - Decision

You'll receive a formal decision notice. This will either be:

• Approved - with or without conditions you'll need to meet

• Refused - with reasons given, and options to appeal or revise your plans

5. What does it cost?

Planning has a price - it's worth factoring this into your overall budget early on.

• Planning application fee - as of 2026, householder applications in England cost £548. Scotland, Wales, and Northern Ireland have their own fee structures.

• If Planning Permission is not required, a Lawful Development Certificate (LDC) is worth considering. This is a legal document from your council proving the build was lawful, which is highly useful when selling the property, and costs £274. 

• Professional advice - using a planning consultant or specialist (like Homz) comes at a cost, but it can save you significant time and money by getting things right first time

6. How long does it all take?

From first enquiry to getting your decision, here's a rough timeline to plan around:

This is a guide only - timescales can vary significantly depending on your council and the complexity of your project. Factor this into your overall project timeline so there are no nasty surprises.

7. What if you don't get permission?

If your application is refused, it's not necessarily the end of the road. You have options:

• Appeal - you can appeal a refusal to the Planning Inspectorate (this takes time and isn't always successful)

• Revise and resubmit - councils will give reasons for a refusal, and it's often possible to adjust your plans and reapply

• Explore alternatives - a planning specialist can advise on whether a different design or size would be more likely to be approved

What you should not do is proceed without permission if it's been refused, or skip the process entirely if it's required. Councils can issue enforcement notices, and selling a property with an unauthorised structure can cause serious problems down the line.

8. FAQs

Can PERGOLUX tell me if I need planning permission?

We're not able to do that - and we wouldn't want to give you the wrong answer. Your best first step is to speak to our partner Homz, who specialise in exactly this.

What's the difference between planning permission and building regulations?

These are two separate things. Planning permission is about whether you're allowed to build. Building regulations are about how it's built - safety standards, structural requirements, insulation, and so on. You may need both, either, or neither. Again, a specialist can advise.

Does a conservatory always add value to my home?

A well-built conservatory in the right setting can add real value - but it's always worth checking with a local estate agent and a planning adviser before you commit.

Can I start building while waiting for a decision?

We'd strongly advise against it. If your application is refused, you may be required to demolish what you've built.

Ready to take the next step?

The best starting point is a conversation with the right people. Our planning partner Homz can review your property and give you clear, professional advice on where you stand - so you can move forward with confidence.

Once you've got that sorted, we're here to help you design the perfect conservatory for your home.