Planning Permission: What You Must Know Before Building on Your Land

Everything You Must Know Before Building on Your Land

A client once called me two weeks after his contractor had already cast the foundation. And he wanted to know, almost as an afterthought, whether he needed to “sort out any paperwork” before they continued to block work. He didn’t. He had no approved plan, no permit, nothing just a foundation, a contractor eager to keep moving, and a very expensive assumption that owning the land meant he could build whatever he wanted on it.

That assumption is the single most common and most costly misunderstanding in building, anywhere in the world. Owning land and having permission to build on it are two completely different things, governed by two completely different sets of rules. This article exists to make sure you never find yourself on that phone call.

I’m going to walk through this the way I actually explain it to clients, students, and family members who ask me the same question in different words because underneath “do I need planning permission,” “can I extend my house,” and “what happens if I just build,” there’s really one question: will the government let me keep what I’m about to build? Let’s answer it properly.

What Planning Permission Actually Is (And Why It Exists)

Planning permission sometimes called development approval, a building permit, or planning consent depending on where you are is formal authorization from a government authority confirming that what you want to build is legally allowed on that specific piece of land, under that area’s current rules.

It is not the same thing as:

Land ownership (having a title or deed doesn’t automatically grant building rights)
Building regulations/building code compliance (a separate technical approval covering structural safety, fire safety, and construction standards, which most places require regardless of whether planning permission itself is needed)
A survey or a site plan (these are documents that support an application; they aren’t the approval itself)

The reason this system exists everywhere, under different names, is genuinely simple: your building doesn’t just affect you. It affects your neighbour’s light and privacy, the drainage of everyone downhill from you, the traffic on your street, and the character of the area you’re building in. Planning permission is the mechanism every functioning government uses to check that before you build, not after.

If you take one thing from this entire article, take this “do I need planning permission” and “do I need a building permit for construction standards” are two separate questions, and in most countries you need to answer yes to both, not just one.

The Universal Test: Four Questions That Decide If You Need Permission

Every country’s specific rules are different, but after years of working across this, I’ve found the same four underlying questions determine whether a project needs planning permission almost anywhere in the world. Ask yourself these before you worry about local specifics:

Are you changing what the land or building is used for? Turning a residential building into a shop, or a house into a place of worship, almost universally triggers a full planning review this is called a “change of use” and it’s treated seriously everywhere.

Are you adding new structure, mass, or height? New builds, extensions, extra storeys, and new outbuildings typically need approval because they change the building’s footprint or silhouette.

Does it affect your neighbours or the public realm? Anything touching boundaries, overlooking neighbouring windows, blocking a shared drainage path, or altering how your building meets the street tends to require sign-off, even in places with otherwise relaxed rules.

Are you on protected, heritage, or specially designated land? Historic buildings, conservation areas, flood zones, and environmentally sensitive land almost always carry stricter requirements than an ordinary plot, everywhere.

If your project touches any of these four questions, assume you need permission until a real conversation with your local authority tells you otherwise. If it genuinely touches none of them a purely cosmetic, internal, non-structural change many jurisdictions won’t require planning permission, though building code compliance may still apply.

Do I Need Planning Permission to Build a House?

Yes, almost without exception, everywhere. A new house is a new use of previously undeveloped (or differently developed) land, it adds structure and height, and it directly affects neighbours, streets, and infrastructure it fails the universal test on every count. There is no country I’m aware of where you can legally construct a new residential building without some form of planning or development approval first.

What differs by country is the process, the documents required, and how long it takes which we’ll get into shortly.

Do I Need Planning Permission to Renovate?

This is where it actually gets interesting, because “renovate” covers a huge range of work, and the honest answer is: it depends entirely on what you’re touching.

Generally does NOT need planning permission (though building code approval may still apply):

Repainting, re-tiling, replacing flooring
Replacing kitchen units or bathroom fittings without moving plumbing significantly
Internal, non-structural wall changes within the existing footprint
Like-for-like repairs and maintenance

Generally DOES need planning permission (or at minimum a building permit):

Removing or altering load-bearing walls
Changing the roofline, roof height, or roof material in a way that alters the building’s silhouette
Any work to a listed, heritage, or protected building even internal work, in many jurisdictions
Any renovation that changes the building’s use (converting a garage into a rentable living unit, for instance)

“Cosmetic” and “structural” are not always the obvious dividing line people assume. Removing a wall you think is “just a partition” without a structural assessment is one of the most common ways an ordinary renovation accidentally becomes an illegal, unpermitted structural change. When in doubt, get a structural engineer to confirm before your contractor touches it.

Do I Need Planning Permission to Extend My House?

This is the question with the most nuance, because most countries have created a middle-ground system specifically for extensions often called “permitted development,” “as-of-right development,” or a similar term that allows smaller extensions without a full planning application, provided you stay within specific, and usually fairly technical, limits.

Common limits you’ll encounter in some form almost everywhere permitted-development-style rules exist:

A maximum percentage of your plot or garden that can be covered by buildings in total
A maximum height, often tied to the height of the existing roof
Restrictions on extending toward the front of the house or a road
Stricter (or entirely removed) rights on designated, heritage, or conservation land
Restrictions when close to a shared boundary or a neighbour’s window

Even where these permitted-rights systems exist, most countries still recommend or require you to formally confirm your project actually falls within them often through something called a certificate of lawful development, or an equivalent letter from your local authority because building outside the limits by mistake carries the same consequences as never having asked at all.

Never rely on a neighbour’s “we didn’t need permission for ours” as your own answer. Extension limits are usually based on your specific plot size, existing coverage, and boundary distances two houses on the same street can have completely different allowances.

What Happens If You Build Without Planning Permission?

I want to be direct about this, because too much content online softens it. Here’s what actually happens, in roughly the order it happens, almost everywhere in the world:

A complaint or routine inspection flags the building. This can come from a neighbour, a passerby, satellite/aerial monitoring increasingly used by planning authorities, or a routine compliance sweep.

You receive an enforcement or stop-work notice. Construction is legally required to halt immediately.

You’re required to submit a retrospective application, if your jurisdiction allows one. Many do — but critically, approval is not guaranteed just because the building already exists.

If retrospective approval is refused, you receive a demolition or removal order. You are legally required to tear down what you built, at your own cost, and restore the site.

Fines and legal costs accumulate throughout this process, often for every day the violation continues.

The violation attaches to the property, not just to you. It shows up in title searches, due diligence for buyers, and mortgage/insurance assessments meaning it can outlive your ownership of the property entirely if it’s never resolved.

An unapproved structure isn’t a one-time risk you absorb and move past once the building is finished. It’s a permanent liability attached to the property until it’s either formally approved or removed which means it resurfaces every single time that property is sold, mortgaged, inherited, or insured.

Can I Build Without Approval and “Sort It Out Later”?

I get asked this constantly, and I understand why construction has momentum, and stopping to wait for approval feels like lost time and money. But here’s the honest, uncomfortable truth from someone who has watched this play out on real sites: “sort it out later” only works when the retrospective application is approved, and there is no guarantee of that anywhere.

What I’ve seen happen instead, repeatedly:

Buildings completed to full finishing, then ordered demolished after a retrospective application was refused meaning every naira, dollar, or pound spent on finishing was lost along with the structure
Sales collapsing at the final stage because a buyer’s lawyer or bank discovered the unapproved status during due diligence
Owners paying significantly more in combined fines, retrospective application fees, and legal costs than the original planning application would ever have cost
Structures that technically survive but permanently cap the property’s resale value, because every future buyer’s search reveals the unresolved violation

The math almost never favours skipping approval. A planning application, even where it takes weeks or months, is close to always cheaper and faster than the alternative timeline of build-get-caught-fight-possibly-demolish.

How Do I Get Planning Permission? A Practical Walkthrough

Here’s the process in the general order it follows almost everywhere, even though the specific names and forms differ:

Confirm the zoning and any specific restrictions on your plot through your local planning office, land registry, or (increasingly) an online planning portal. This tells you what’s even possible before you design anything.

Get your survey and site plan prepared an accurate, professionally prepared plan of your plot is the foundation every application is built on.

Commission your architectural (and, where required, structural) drawings from a registered professional. Most authorities won’t accept drawings from someone without recognized professional registration.

Submit your application with the required drawings, forms, and fee to the relevant local planning authority.

Neighbour notification or public consultation, where applicable many jurisdictions require neighbours to be informed and given a chance to object or comment before a decision is made.

Review and decision the authority checks your application against zoning, setback, height, and other local rules, and either approves, approves with conditions, refuses, or requests amendments.

Address conditions or amendments, if any a conditional approval is common and simply means specific requirements must be met before or during construction.

Receive your formal approval and keep it on file you will very likely need to produce it again at multiple points: for utility connections, for a mortgage, and eventually for resale.

Submit your soil test and survey before you finalize your architectural drawings, not after. Redesigning a foundation or layout because of a soil or boundary surprise discovered after your drawings are done wastes both time and design fees you didn’t need to spend.

How Long Does Planning Permission Take?

This varies more by country and project complexity than almost anything else in this process, but here are realistic general ranges you can use to set expectations:

Simple, small residential projects (a straightforward extension, a single-family home in a standard zone): commonly a few weeks to around three months

Standard new house builds: commonly two to six months, depending on how complete and correct the application is on first submission

Complex projects (heritage sites, environmentally sensitive land, larger developments, anything requiring public consultation): six months to well over a year

The single biggest factor within your control is submission quality. Incomplete applications, missing documents, or drawings that don’t match required formats are the most common reason a straightforward project takes far longer than it should not because the rules are inherently slow, but because back-and-forth requests for missing information restart parts of the clock.

The Layer Almost Nobody Covers: Other Approvals Hiding Inside “Planning Permission”

This is where I want this guide to genuinely go further than what’s currently answering this question online, because “do I need planning permission” often hides several separate approvals inside one conversation:

Building code / building regulations approval a separate technical sign-off on structural safety, fire safety, ventilation, and construction standards, required in most jurisdictions regardless of whether planning permission itself was needed

Environmental or drainage approval required where a project affects flood risk, wetlands, or stormwater systems, and increasingly enforced as urban flooding becomes a bigger concern globally

Utility and connection approvals power, water, and sewage connections often require their own sign-off referencing your approved plan, meaning an unapproved building can struggle to get legally connected to services at all

Heritage or conservation approval a separate layer entirely from standard planning permission, often with its own authority and its own, usually stricter, timeline

Party wall or boundary agreements a legal requirement in some jurisdictions (the UK being a well-known example) that sits alongside, not instead of, planning permission when work affects a shared wall or boundary

Missing any one of these while correctly securing the “main” planning permission is still enough to leave your project non-compliant which is why I encourage clients to ask their planning authority directly: “what approvals, plural, do I need for this project?” rather than assuming one approval covers everything.

How Unapproved Building Affects Insurance, Mortgages, and Resale

This is the layer that most planning-permission content skips entirely, and it’s often the part that actually costs people the most money down the line.

Insurance: Many property and building insurance policies either exclude or void coverage for unapproved structures, meaning a fire, storm, or structural failure affecting an unpermitted extension may not be covered at all — you could be left rebuilding entirely at your own cost on top of everything else.

Mortgages and financing: Lenders in most markets require proof of planning approval before financing a purchase or a construction loan, and an unapproved structure discovered during a valuation or survey can stall or kill a financing deal at the last stage.

Resale value and buyer due diligence: An unresolved planning violation attaches to the property’s title and surfaces in nearly every serious buyer’s due diligence process. Even where a sale eventually happens, it’s common for buyers to demand a significant price reduction to cover their own risk of inheriting the violation, or to walk away entirely.

If you’re building to eventually sell, rent, or mortgage the property which is nearly everyone treat planning approval as part of the property’s financial value, not just a legal formality. An unapproved building is, functionally, a discounted or unsellable asset until the paperwork is resolved.

Planning Permission Around the World: What Actually Changes by Country

The four-question test above holds everywhere, but the process, thresholds, and terminology genuinely differ. Here’s a general snapshot always confirm specifics with your local planning authority, since rules change and vary even within a single country by state, region, or council.

Nigeria:

Building approval is handled at the state level (for example, LASPPPA/LASBCA in Lagos, or the equivalent development control authority in other states), generally requiring survey documents, architectural and structural drawings, and a soil test for the approval application, with enforcement against unapproved structures being an active and increasing priority in major cities.

United States:

Handled locally through city or county building/zoning departments; “planning permission” is more commonly discussed as zoning compliance plus a building permit, with rules varying significantly even between neighbouring municipalities.

United Kingdom:

Planning permission and building regulations approval are distinct, with a “permitted development rights” system allowing many smaller home extensions without a full planning application, subject to specific size and boundary limits.

Canada:

Municipal zoning bylaws and building permits govern most residential construction, with significant variation between provinces and even between cities within the same province.

Australia:

Development approval (DA) from the local council, plus a separate construction certificate, are both generally required for new builds and significant renovations, with exempt/complying development pathways for smaller projects in many states.

South Africa:

Building plans must generally be approved by the local municipality before construction, under the National Building Regulations framework, with penalties for unapproved structures actively enforced in many municipalities.

Germany, Austria, Switzerland:

Building permits (“Baugenehmigung” and equivalents) are required for most new construction and significant alterations, with detailed technical and energy-efficiency standards reviewed as part of the approval.

France, Belgium, Luxembourg:

A “permis de construire” or equivalent building permit is required for new construction and most significant extensions, with simpler declaration processes available for smaller projects in some cases.

Netherlands, Denmark, Sweden, Norway, Finland:

Environmental/building permits (“omgevingsvergunning” and equivalents) are required for most construction, generally applied for through centralized digital government portals.

Ireland:

Planning permission from the local council is required for most new builds and significant extensions, with an “exempted development” category covering smaller works similar in spirit to the UK’s permitted development system.

UAE, Singapore:

Building permits are required through the relevant municipal or development authority, with generally structured, document-heavy application processes and clearly defined timelines published by the authority.

New Zealand:

Building consents are required from the local council for most construction, separate from resource consent, which addresses land-use and environmental planning matters.

This list is a starting orientation, not a substitute for confirming your specific project against your specific local authority’s current rules which, everywhere, remain the only truly authoritative answer.

Common Myths About Planning Permission

“It’s my land, I can build what I want.” Ownership and development rights are legally separate almost everywhere; this is the single most expensive misunderstanding in construction.

“My neighbour didn’t get permission, so I don’t need to either.” Unapproved neighbouring buildings are not proof of a legal exemption they’re simply violations that haven’t been caught or enforced yet.

“Small buildings don’t need approval.” Size affects which process applies (a simplified pathway versus a full application), not whether some form of approval is needed at all.

“Once it’s built, it’s too late for anyone to do anything.” Enforcement and demolition action can and does happen after completion, sometimes years later, in nearly every jurisdiction with active planning enforcement.

“Getting permission always takes forever.” Complete, well-prepared applications for straightforward projects are frequently approved within weeks long delays are disproportionately caused by incomplete submissions, not the system itself.

A Practical Checklist Before You Touch Your Land

Confirm your plot’s zoning and any specific restrictions with your local planning authority
Get a soil test and professional survey before finalizing any design
Commission drawings from a registered architect and, where required, a structural engineer
Confirm whether your specific project needs full planning permission, falls under a permitted/exempted pathway, or needs written confirmation either way
Submit a complete application the first time missing documents are the most common cause of delay
Keep every approval document safely; you will need to produce it again at financing, connection, and resale stages
Never let construction outpace your paperwork if approval hasn’t arrived, work hasn’t started

Frequently Asked Questions

Do I need planning permission for a small shed or outbuilding?

Often not, if it falls within a size and height threshold your jurisdiction treats as exempt or permitted but this threshold varies significantly by location, and building on protected or heritage land removes most exemptions regardless of size.

Can I get planning permission after I’ve already built?

Sometimes, through a retrospective application, but approval is never guaranteed, and refusal can still result in a demolition order even though the building already exists.

Does planning permission expire?

Yes, in most jurisdictions an approved plan is usually only valid to start construction within a set number of years, after which you may need to reapply if construction hasn’t begun.

Is planning permission the same as a building permit?

No. Planning permission confirms the project is allowed on that land under local zoning rules; a building permit confirms the construction itself meets safety and structural standards. Most projects need both.

Who enforces planning permission violations?

The local planning or development control authority, often triggered by complaints, routine inspections, or increasingly, aerial and satellite monitoring in many jurisdictions.

Finally

Planning permission isn’t bureaucracy standing between you and your building it’s the one process that actually protects the money, time, and years you’re about to put into that structure. Every shortcut around it trades a short delay now for a much larger risk later: a stop-work order, a demolition, a stalled sale, or a mortgage that falls through at the worst possible moment. Ask first. Build second. It really is that simple, everywhere in the world, even though the specific form asking takes will differ depending on where your land is.

If you’re at the very start of this process on Nigerian land specifically, our Services page outlines how we support clients through survey, design, and approval from the beginning. Browse our Plans Library for designs already developed with approval requirements in mind, or visit Plan School to understand building plans and the documents your application will actually need. You can also explore more building and approval guides on our Homepage.

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Author

Massodih Okon is a Nigerian built-environment professional with academic and professional experience in urban and regional planning, geography, architectural design, Landscape Design, GIS and land development.

He holds a Master’s degree in Urban and Regional Planning from the University of Uyo and a first degree in Geography and Regional Planning.

Through MassodihPlans, he publishes practical guides on Nigerian house plans, building design, physical planning, site planning, development approval and residential construction. Read the full author profile →

About The Author

Massodih Okon

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Planning Permission Explained: Everything You Must Know Before Building on Your Land