Temporary structures are used across the UK for a wide range of purposes. Businesses may use them to create additional workspace, schools may install temporary classrooms, event organisers may use marquees and exhibition buildings, and construction companies may rely on site cabins and welfare facilities.
However, the term ‘temporary structure’ can be confusing. Many people assume that a structure is automatically exempt from planning rules because it can be moved, dismantled or removed. In practice, the planning position is more complex.
If you are asking, “What is classed as a temporary structure in the UK?”, the answer will depend on the structure’s purpose, design, location, intended duration and how it is used. A structure may be described as temporary because it is designed to remain in place for a limited period, but this does not necessarily mean that it is exempt from planning permission or other legal requirements.
Understanding how a temporary structure may be assessed can help you make informed decisions before purchasing, installing or using one. Early planning advice can also reduce the risk of delays, enforcement action and unexpected costs.
Planning Build provides professional support with planning strategy, feasibility assessments, planning applications, architectural design and building regulations. Whether you are considering a temporary structure for commercial, educational, residential, construction or event use, our team can help you assess the project and understand the relevant requirements.
What Is Classed as a Temporary Structure in the UK?
A temporary structure is generally a building, installation or physical structure intended to remain in place for a limited period rather than permanently.
Temporary structures are often designed to be the following:
- Portable
- Modular
- Demountable
- Relocatable
- Easy to assemble and dismantle
- Removed when their purpose has ended
However, there is no single definition that automatically determines the planning status of every temporary structure.
The word ‘temporary’ usually describes the intended duration or purpose of the structure. It does not automatically confirm whether planning permission is required.
When considering what is classed as a temporary structure in the UK, the local planning authority may assess the circumstances of the proposal, including:
- How long the structure will remain on site
- The size and scale of the structure
- Its physical appearance
- Whether it is fixed to the ground
- Its intended use
- Its location
- Its relationship with existing buildings
- Its effect on neighbouring properties
- Whether it changes the use of the land
A structure that is technically movable may still be treated as development for planning purposes if it has a significant physical presence or is used as part of a wider development.
Common Examples of Temporary Structures
Temporary structures come in many forms and can be used across different sectors.
Temporary Classrooms
Schools and educational institutions may use temporary classrooms to provide additional teaching space during periods of increased demand, refurbishment or redevelopment.
These buildings may be modular and designed to be relocated. However, their planning status may depend on their size, location, intended duration and impact on the school site and surrounding area.
Planning considerations may include:
- Access and circulation
- Noise
- Traffic and parking
- Design and appearance
- Impact on neighbouring properties
- The relationship with existing school buildings
Portable Offices and Site Cabins
Portable offices and site cabins are commonly used on construction sites, industrial premises and commercial land.
They may provide office space, meeting rooms, storage or welfare facilities.
The planning position may depend on whether the structure is genuinely linked to temporary construction activity or is being used as a longer-term operational building.
Marquees and Temporary Event Structures
Marquees are often used for weddings, festivals, exhibitions, corporate events and community gatherings.
Other temporary event structures may include:
- Stages
- Seating areas
- Exhibition spaces
- Ticket booths
- Temporary hospitality buildings
- Event pavilions
The planning requirements may depend on the event’s location, duration, frequency, scale and impact.
Modular Buildings
Modular buildings are manufactured in sections and assembled on site.
They can be used for:
- Offices
- Classrooms
- Healthcare facilities
- Retail spaces
- Accommodation
- Community buildings
Although modular buildings are often marketed as temporary or relocatable, they can be substantial structures. Their planning status will depend on how they are installed, how long they remain on site and how they are used.
Temporary Storage Buildings
Businesses may use temporary storage structures to manage seasonal stock, increased demand or short-term operational requirements.
These structures may include:
- Temporary warehouses
- Fabric-covered storage buildings
- Storage tents
- Portable storage units
Planning considerations may include the building’s size, height, location and visual impact. The use of the structure may also affect traffic, servicing and activity on the site.
Pop-Up Retail Structures
Pop-up shops and temporary retail units are used for seasonal trading, product launches, markets and short-term commercial activities.
The planning authority may consider whether the proposal introduces a new use of land, affects the character of the area or creates additional traffic, noise or waste.
Temporary Healthcare Facilities
Temporary healthcare buildings may be installed to provide additional treatment space, support emergency services or accommodate refurbishment works.
These structures may need to meet requirements relating to accessibility, fire safety, ventilation and building performance.
Temporary Accommodation
Temporary accommodation may be provided during construction projects, emergency situations or short-term housing needs.
Planning considerations may include the location, duration, access, infrastructure and effect on neighbouring properties.
What Is the Difference Between a Temporary and Permanent Structure?
The main difference is generally the intended duration and purpose of the structure.
A permanent structure is usually intended to remain on the site indefinitely. It is commonly designed and constructed as a long-term part of the property.
A temporary structure is generally intended to remain for a limited period and may be designed to be moved, dismantled or removed.
However, the distinction is not always straightforward.
A temporary structure may remain in place for a long period, while a structure that was originally intended to be permanent may later be removed.
The planning system does not necessarily rely only on whether the owner describes a structure as temporary. The local planning authority may consider the structure’s actual characteristics and effects.
For example, a large modular building may be designed to be relocated but may still have a substantial presence on the site. If it remains in place for an extended period and supports an ongoing use, it may be treated differently from a small marquee used for a single event.
Does a Temporary Structure Need Planning Permission?
A temporary structure may require planning permission, but this depends on the details of the proposal.
The fact that a structure is temporary does not automatically mean that planning permission is unnecessary.
The local planning authority may consider the following:
The Structure’s Size and Scale
Large structures may have a greater effect on the appearance and use of a site.
The planning authority may assess the following:
- Height
- Footprint
- Volume
- Position
- Visibility
- Relationship with nearby buildings
The Intended Duration
The length of time the structure will remain on site can affect how it is assessed.
A structure used for a short event may be treated differently from one that remains in place for several months or years.
However, there is no single time limit that automatically applies to every temporary structure.
The Use of the Structure
The intended use may be an important planning consideration.
A temporary structure used for storage may be assessed differently from one used as:
- A classroom
- An office
- A retail unit
- A café
- Residential accommodation
- A public event venue
The use may affect traffic, noise, operating hours, parking and the intensity of activity on the site.
The Location
Temporary structures in sensitive locations may require more detailed planning consideration.
These locations may include:
- Conservation areas
- Green Belt land
- National Parks
- Areas of Outstanding Natural Beauty
- Listed building settings
- Heritage sites
- Residential areas
The Impact on Neighbours
A temporary structure may affect neighbouring properties through the following:
- Loss of privacy
- Overshadowing
- Reduced daylight
- Noise
- Visual impact
- Increased traffic
- Parking pressure
- Changes to access
The temporary nature of the structure may be considered, but it does not automatically remove these potential planning concerns.
How Long Can a Temporary Structure Stay in Place?
There is no universal time limit that applies to every temporary structure in the UK.
The permitted duration may depend on the type of structure, its use, the location and the relevant planning rules.
Some temporary uses and structures may be covered by specific planning provisions. Others may require planning permission before installation.
It is important not to rely on a general assumption that a structure can remain for a particular number of days, months or years without planning approval.
The planning position should be assessed based on the details of the project.
Planning Build can provide feasibility advice and planning strategy to help identify potential planning requirements before you invest in a temporary structure.
Temporary Structures and Permitted Development Rights
Some development may be allowed under permitted development rights without the need for a full planning application.
However, permitted development rights are subject to conditions, limitations and restrictions.
The availability of permitted development rights may depend on:
- The type of property
- The use of the land
- The location
- The size of the structure
- The purpose of the development
- Existing planning conditions
- Whether the site is within a designated area
Permitted development rights may also be restricted or removed in certain locations.
It is important not to assume that a temporary structure automatically benefits from permitted development rights.
Professional planning advice can help determine whether a proposal may be permitted development or whether a formal planning application is required.
Temporary Structures and Building Regulations
Planning permission and building regulations are separate systems.
Planning permission is mainly concerned with whether a development is suitable for a particular location.
Planning considerations may include:
- Land use
- Design
- Appearance
- Local character
- Impact on neighbours
- Traffic and access
- Environmental effects
Building regulations focus on the technical design and construction of a building or structure.
They may address:
- Structural safety
- Fire safety
- Accessibility
- Ventilation
- Energy efficiency
- Drainage
- Electrical safety
A temporary structure may require planning permission, building regulations approval or both.
The exact requirements will depend on the structure’s design, size, use and intended duration.
Planning Build can provide support with building regulation compliance as part of a coordinated project service.
Common Misconceptions About Temporary Structures
“If It Can Be Moved, It Does Not Need Planning Permission.”
This is not always correct.
A movable or portable structure may still require planning permission depending on how it is used, where it is located and how long it remains on site.
“Temporary Structures Never Need Building Regulations Approval”
Temporary structures may still need to meet relevant building standards.
Requirements may depend on the structure’s size, use, occupancy and duration.
“A Temporary Structure Can Stay for Any Length of Time”
There is no general rule allowing every temporary structure to remain indefinitely.
The planning position depends on the circumstances and relevant planning legislation.
“Calling a Structure Temporary Makes It Exempt”
The label used by the owner or supplier does not automatically determine the planning status.
The planning authority may consider the structure’s actual characteristics, use and impact.
“Temporary Planning Permission Automatically Becomes Permanent”
Temporary planning permission is time-limited.
A further planning application may be needed if the development is intended to continue beyond the approved period.
How Planning Build Can Help
Understanding what is classed as a temporary structure in the UK is only the first stage of planning a project.
You may also need to assess:
- Whether planning permission is required
- Whether the proposal may benefit from permitted development rights
- The likely planning risks
- The appropriate planning strategy
- The information needed for an application
- Building regulations requirements
- Design and technical considerations
Planning Build provides a range of professional services to support temporary structure projects from the initial concept through to planning and technical approval.
Our services include:
- Planning permission advice
- Planning application support
- Feasibility advice and planning strategy
- Architectural design
- Building regulation compliance
- Planning appeal support
By seeking professional advice early, you can identify potential planning issues before purchasing, installing or committing to a temporary structure.
Frequently Asked Questions
What is classed as a temporary structure in the UK?
A temporary structure is generally a building or installation intended to remain on a site for a limited period rather than permanently.
Examples include marquees, portable offices, site cabins, temporary classrooms, modular buildings and pop-up structures.
However, the planning status will depend on the structure’s size, use, location, duration and impact.
Does a temporary structure need planning permission?
It may do.
Planning permission depends on the details of the proposal. A temporary structure is not automatically exempt simply because it can be removed or relocated.
Is a portable building considered a temporary structure?
A portable building may be considered temporary, but its planning status will depend on how it is installed, used and retained on the site.
Portable buildings can still require planning permission.
How long can a temporary structure remain in place?
There is no universal time limit.
The permitted duration depends on the type of structure, its use, the location and the relevant planning rules.
Are marquees temporary structures?
Yes. Marquees are commonly considered temporary structures because they are generally assembled for limited periods and removed afterwards.
However, larger or frequently used marquees may still raise planning and other regulatory considerations.
Can a temporary structure become permanent?
A structure may remain physically temporary or relocatable while being used for a long period.
If its use continues beyond the intended period, further planning permission may be required. Temporary planning permission does not automatically become permanent.
Get Professional Advice Before Installing a Temporary Structure
Temporary structures can provide flexible and practical solutions for businesses, schools, events, construction projects and community organisations.
However, understanding what is classed as a temporary structure in the UK is only part of the process. The structure’s planning status will depend on its size, location, use, duration and impact.
Before purchasing or installing a temporary structure, it is important to assess the planning requirements and consider whether a formal application or other approval may be needed.
Planning Build can help you review your proposal, develop a suitable planning strategy and prepare the required documentation.
Visit our services page to explore our planning and design services, or contact Planning Build to discuss your temporary structure project with our team.
