Most people running a business from home in the UK need no planning permission and no special licence, because the law only bites when the character of your property changes. The test that matters is whether your home remains, in substance, a home. If a spare room, garage or garden office is used for quiet work with no significant increase in visitors, deliveries, noise or parking, you are almost always free to carry on without telling the council.
The parts that trip owners up are rarely planning. They are the contract terms and cover you already signed up to: a mortgage condition, a tenancy clause, a lease that bans business use, and a home insurance policy that quietly excludes business stock, business equipment and public liability. Get those four right, understand when business rates and capital gains tax can apply, and choose a sensible method for working from home tax relief, and you have covered everything that actually causes trouble.
Planning permission and the material change of use test
Planning permission for a home business hinges on a single legal question: has there been a “material change of use” of the dwelling? If your home is still overwhelmingly a home and the business is incidental, the answer is no and you do not need consent. The council looks at the reality on the ground, not your job title.
The questions that decide it in practice are consistent, and you can self-assess honestly against them:
- Does the property remain substantially a home? Working from a laptop in a bedroom is fine. Converting the whole ground floor into a workshop or salon is not.
- Customer or delivery traffic. A steady stream of clients, couriers or staff arriving changes the character of a residential street and is the single most common trigger for objections.
- Signage. An external sign advertising the business is a strong signal of commercial use and can need advertisement consent in its own right.
- Noise and smells. Machinery, extraction, cooking odours or anything neighbours can hear or smell will count against you.
- Parking. Extra vehicles, a works van, or clients competing for kerb space are frequent grounds for complaint.
If your honest answers keep the property looking and behaving like a normal home, you are within your rights. If several answers point the other way, contact your local planning authority before you start. The government’s overview of when you need planning permission is the primary source, and the Planning Portal guidance on working from home sets out the change of use principle in plain terms.
Garden offices and permitted development
A garden office or garden room can usually be built under “permitted development”, which is a set of rights that let you build certain structures without a full application. The limits are about size, height and position, not about the fact that you work in there. As a rough guide, single-storey outbuildings are constrained on eaves and ridge height, must not cover more than half the garden, and face tighter rules within two metres of a boundary.
Where a garden office crosses into needing consent is when it stops being incidental to enjoyment of the house. If people are employed to work in it, clients visit it regularly, or it becomes a self-contained commercial unit, the incidental character is lost and you may need permission. Listed buildings, conservation areas and flats have reduced or no permitted development rights, so check your specific position before you order the timber.
The paperwork most people miss
Planning is public law. The bigger risk for most owners is private contract law, because breaching a mortgage, tenancy or lease term can cost you far more than a planning enquiry ever would.
Your mortgage
Residential mortgages often contain a condition that the property is used as a private dwelling and not for business. Light home-based work is rarely a problem, but running a business with visitors, staff or stock can breach the terms. A short written enquiry to your lender, kept on file, protects you and costs nothing.
Your tenancy or lease
If you rent, read the tenancy agreement for a clause prohibiting business use, and get written consent from the landlord before trading. If you own a leasehold flat, the lease frequently restricts use to a private residence, so business activity can technically breach it. Where a freeholder or managing agent is involved, tell them and get permission in writing.
Telling your freeholder and others
Leaseholders should notify the freeholder where the lease requires it, and in some blocks the buildings insurance and service charge terms assume residential use only. A two-line letter or email seeking consent is cheap insurance against a dispute later.
Insurance: why standard home cover is not enough
This is the gap that catches out otherwise careful owners. A standard home insurance policy is written for domestic life, and it usually will not cover business stock, business equipment above a small limit, loss of business data, or your liability if a client or courier is injured on your property. If you make a claim and the insurer discovers undeclared business use, they can reduce or refuse it, and in some cases void the whole policy.
A home business insurance policy, or a business add-on to your home cover, closes that gap. Depending on what you do, you will want some or all of the following:
- Business equipment and stock cover for laptops, tools, cameras or products held at home.
- Public liability if any customer, supplier or delivery driver ever comes to the property, which typically covers claims into the low millions.
- Product liability if you make or sell physical goods.
- Professional indemnity if you give advice or provide a professional service.
- Business interruption to replace lost income if you cannot trade after, say, a fire or flood.
Prices vary widely by trade and cover level, so treat any figure as approximate and subject to change, but a simple home-based service business can often add meaningful cover for a modest annual premium. Tell your home insurer about the business use even if you buy the commercial cover elsewhere, so your household policy stays valid. If your business relies on customer data, pair the cover with the basics in our guide to Cyber Essentials for UK small businesses.
Business rates and small business rate relief
Most home businesses pay council tax as normal and nothing more. Business rates can apply where part of the home is used exclusively and specifically for business, for example a converted garage fitted out as a workshop, a room turned into a treatment room, or a property where customers regularly attend. The Valuation Office Agency decides this, and a room that doubles as a domestic space usually will not be rated.
If a part is rated, small business rate relief can reduce or remove the bill for premises with a low rateable value, and many small home setups pay nothing after relief. The thresholds and multipliers change, so confirm current figures on the gov.uk pages for business rates when working from home before you assume either way. Where business rates do apply to a part, you generally still pay council tax on the domestic remainder.
The tax side: working from home tax relief
If you are self-employed, you can deduct a share of your household running costs against your business profits. There are two methods, and you pick whichever gives the better result and suits your record-keeping.
The simplified flat rate
HMRC’s simplified expenses let you claim a fixed monthly amount based on the hours you work from home each month, with no need to apportion bills. It is quick and low-risk, but the flat rates are modest and rarely reflect the true cost of a heavily used home office. Check the current bands on the gov.uk guide to simplified expenses for working from home, as the figures are set by HMRC and change over time.
The proportion of actual costs
The alternative is to work out the business proportion of your real costs. You take household bills that increase because you work at home (heat, light, metered water, broadband, and a share of rent, mortgage interest, council tax and insurance where reasonable), then apportion them by the number of rooms used and the time each is used for business. A common approach is to divide by the number of rooms, then apply the fraction of time that room is used for work.
This method usually produces a larger, legitimate deduction, but it needs tidy records and a defensible basis for the split. If you already run digital bookkeeping, the actual costs method is far less painful; see our overview of the best AI accounting tools for UK small businesses and, if you are a sole trader, the SME guide to Making Tax Digital, which is changing how these records must be kept.
Simplified versus actual costs compared
| Method | How it works | Records needed | Likely relief | Best for |
|---|---|---|---|---|
| Simplified flat rate | Fixed monthly amount by hours worked at home | A note of hours worked from home each month | Modest, capped by HMRC bands | Occasional or part-time home working and anyone who wants zero admin |
| Proportion of actual costs | Business share of real bills, split by rooms and time | Bills kept, plus a reasoned room and time split | Usually higher, reflects real use | Full-time home working with a defined workspace and decent records |
Worked reasoning: an owner using a spare room full time, with meaningful heating, lighting and broadband costs, will normally beat the flat rate on the actual costs method, so the extra bookkeeping pays for itself. An owner who does a few hours of admin at home each week is better off with the flat rate, because apportioning bills for light use is effort for pennies.
The capital gains warning
Your main home is normally exempt from capital gains tax when you sell, thanks to private residence relief. If you use part of the home exclusively for business, that exclusive part can lose the exemption, and a slice of any gain becomes taxable. The practical fix is to avoid a room being used only and always for business: keep a genuine dual use, such as a study that is also used domestically, so the relief is not restricted. Take advice before you claim exclusive business use of a room, because a larger income tax deduction now can cost you more in CGT later.
Practical operations: address, licences and limited companies
If you run a limited company from home, your registered office and director’s service address go on the public Companies House register by default, which means your home address is searchable by anyone. A registered office service, offered by many accountants and formation agents for an approximate annual fee that varies by provider, keeps your home address off the public record. This sits alongside the newer duties in our guide to Companies House identity verification, and if you are choosing your company’s activity codes, our explainer on SIC codes will help.
Some home activities carry their own licensing regardless of planning. Preparing food for sale usually requires registration with your local authority’s environmental health team and compliance with food hygiene rules. Childminding from home requires registration with Ofsted (or the relevant devolved regulator) and inspection. Selling alcohol, certain animal-related activities and some beauty treatments also have specific licences. Check your local council’s website for the activity you plan before you trade.
If you handle customer or client personal data, you may also need to pay the ICO’s data protection fee and register as a data controller. The ICO’s guidance on the data protection fee sets out who must pay and how much.
Mistakes people actually make
- Assuming home insurance covers the business. It usually does not, and an undeclared claim can be refused. Declare the use and buy the cover.
- Ignoring the lease or tenancy. A prohibition on business use is common and enforceable. Read it and get written consent.
- Claiming a room is used exclusively for business. It boosts the tax deduction but can trigger business rates and a capital gains bill on sale.
- Putting up a sign and inviting clients without a second thought. Both can tip you into a material change of use and neighbour complaints.
- Leaving your home address on the public register. A registered office service fixes this cheaply for company directors.
- Not telling the mortgage lender. A quick written enquiry removes the risk of breaching your terms.
Frequently asked questions
Do I have to tell the council I run a business from home?
Not if your home stays substantially a home with no significant rise in visitors, deliveries, noise or parking. You only need to involve the council if the use materially changes the character of the property, or if a separate licence (food, childminding, alcohol) applies. If you are unsure, a short pre-application enquiry to the planning department is worth it.
Can clients visit my home business?
Occasional visitors are usually fine. Regular client traffic, especially if it creates parking pressure or disturbs neighbours, is the classic trigger for a material change of use and for complaints. If visits are central to your model, check with planning and confirm your insurance includes public liability.
Can I put up a sign?
External advertising signs can require separate advertisement consent and are strong evidence of commercial use, so treat them with caution. A discreet nameplate is lower risk than an illuminated board. If in doubt, ask your council before you fix anything to the wall.
Does running a limited company instead of being a sole trader change the answer?
The planning, insurance and business rates tests are about how the property is used, not your legal structure, so they apply either way. The differences are administrative: a company puts a registered office on the public record unless you use a service address, and it claims home-working costs through the company rather than on a self-assessment return. The trading structure does not exempt you from any of the property rules.
Will working from home affect selling my house?
Only if part is used exclusively for business, which can restrict private residence relief and make a share of your gain taxable. Keeping any workspace in dual domestic and business use normally preserves the full exemption. Take advice before claiming a room as exclusively business.
What to do next
- Run the change of use test today. Score yourself honestly on visitors, deliveries, signage, noise, smells and parking. If several point to commercial use, send a pre-application enquiry to your local planning authority before you trade.
- Check your three contracts. Read your mortgage conditions, tenancy agreement or lease for any restriction on business use, and get written consent from lender, landlord or freeholder where needed.
- Fix your insurance and choose a tax method. Tell your home insurer, add business equipment, stock and public liability cover as appropriate, then decide between the simplified flat rate and the actual costs method using the table above.
- Sort the admin. If you trade as a company, set up a registered office service to keep your home address private, confirm whether any activity licence or the ICO data protection fee applies, and diarise a check of current HMRC rates and rate relief thresholds each tax year.
