An external platform lift can provide access to a raised entrance, terrace or outdoor level that would otherwise require steps. However, deciding whether one will fit involves more than measuring an empty patch beside the building.
The usable platform, overall lift footprint, entrance arrangement and surrounding access space all affect the installation. A lift might physically fit into a courtyard but leave insufficient room for a wheelchair user to approach its gate or move away at the upper landing.
There is no single minimum space requirement that applies to every external platform lift. The right dimensions depend on the equipment, the height it needs to travel and the people using it.
DHG Services can help you assess an outdoor access problem and compare suitable lift arrangements. Understanding the measurements involved is a useful starting point before arranging a property survey.
Platform Size and Installation Footprint Are Different Measurements
The platform size describes the usable area where the passenger stands or positions their wheelchair. The installation footprint describes the space occupied by the equipment, including components around or beneath that platform.
These measurements should never be treated as interchangeable.
For example, Stannah’s published Lowriser brochure gives the following dimensions for one configuration:
| Measurement | Published dimensions |
|---|---|
| Platform width and depth | 900 × 1,450 mm |
| Lift footprint | 1,104 × 1,491 mm |
| Footprint with the entry ramp lowered | 1,104 × 1,885 mm |
The same brochure specifies additional clearance information and directs readers to the relevant technical drawings. These figures illustrate how the equipment extends beyond the usable platform; they are not universal minimum dimensions or a complete installation layout.
You must also allow for the approach route, landing space and any gate movement. Those areas cannot simply be assumed to fit within the manufacturer’s quoted footprint.
When reviewing a quotation, ask for a drawing that distinguishes the platform dimensions from the overall installation requirements.
Start with the Wheelchair and the Person Using It
Choosing the smallest available platform may appear to solve a space problem, but the equipment must accommodate its intended users comfortably.
A wheelchair assessment should consider the chair’s occupied width, length and weight. Footplates, anti-tip bars, head supports and other attachments can extend beyond the dimensions of the seat itself.
The user’s method of entering and leaving the lift matters too. Someone who can manoeuvre independently may need a different arrangement from a person travelling with assistance.
If an attendant needs to travel on the platform, both the available space and rated load must accommodate that use. A larger platform does not automatically mean the lift has sufficient capacity.
Discuss any anticipated changes in equipment before ordering. A platform suitable for a current manual wheelchair may not suit a larger powered chair in the future.
Allow Space to Approach and Leave the Lift
The access route should be assessed from the point where the user begins their journey through to the destination.
At the lower level, consider whether the wheelchair can approach the entrance directly or must turn around a wall, parked vehicle or garden feature. A narrow path may lead to the lift but still prevent the user from lining up with its opening.
At the upper level, there must be enough room to leave the platform and continue towards the building or outdoor area. A landing immediately beside a doorway needs particular attention because opening the door can reduce the available manoeuvring space.
These movements should be checked using the intended wheelchair dimensions and the proposed gate arrangement. Measuring the landing without accounting for door swings or projecting handles can give a misleading impression of how much room is available.
A successful installation provides a usable route at both ends, rather than simply a platform that fits between them.
Entrance Direction Can Change the Layout
The position of the entrances can make a substantial difference to how the lift works within a restricted space.
A through-entry arrangement allows the user to enter at one end and leave at the opposite end. Where the surrounding layout supports it, this can reduce the need to turn on the platform.
Other configurations may involve adjacent entrances or entering and leaving from the same side. Their suitability depends on the selected model, platform dimensions and the user’s ability to manoeuvre.
Gate operation must also be considered. A manually operated gate needs to be reachable, while a powered gate still requires the specified operating clearance.
Before choosing an entrance arrangement, consider where the wheelchair will be positioned while the gate opens and how the user will reach the controls. The most compact equipment layout may not provide the easiest daily journey.
The Travel Height Influences the Lift You Need
An external platform lift serving a few entrance steps presents a different design problem from equipment providing access to a substantially higher level.
The rise determines which products can be considered. It can also affect the guarding, support arrangement, enclosure and landing construction.
Manufacturer limits vary. For example, Terry Lifts describes its Melody 3 as an unenclosed platform lift for indoor or outdoor use, with maximum travel of three metres and a lower maximum for public-access applications. This is a specification for that product, rather than a limit applying to every external lift.
The survey should establish the actual height difference between the finished lower surface and upper landing. Counting steps gives an initial indication, but accurate measurements are needed before specifying equipment.
Where a greater travel height is involved, a different lift design may be required.
Check Clearances Above and Around the Equipment
Outdoor space can appear unrestricted until the full travel route is considered.
An overhanging roof, balcony, canopy or tree branch may affect the position. Nearby windows, drainpipes and external lights can also interfere with the equipment or its maintenance access.
The installer needs to check the manufacturer’s required clearances throughout the lift’s movement. An area that is clear at ground level may become restricted higher up.
For enclosed equipment, the structure itself introduces additional dimensions. The enclosure height and any required overhead allowance must be checked against the building.
Avoid selecting a position solely from a ground-level photograph. A survey needs to consider the installation in three dimensions.
Ground Preparation and Drainage Need Their Own Space
The proposed surface must be assessed against the lift manufacturer’s requirements. Existing paving or decking should not automatically be assumed suitable to support the equipment.
Depending on the design, installation may involve a prepared base, foundations, fixings or changes to the surrounding surface. Some products use an entry ramp, while others may require a recessed arrangement.
Drainage should form part of the layout assessment. The proposal needs to account for surface water, nearby drains and access to any drainage components that require maintenance.
Outdoor exposure also matters when selecting equipment and its position. Ask about the model’s operating conditions and any measures needed for the particular site.
A quotation should identify the known preparation work so that the space and cost of the project are assessed together.
Could a Ramp Work Better in the Available Area?
A ramp and a platform lift solve an access problem in different ways.
A ramp needs a route with an appropriate gradient, suitable landings and enough space for safe use. As the height difference increases, the required route can become more difficult to accommodate within a small frontage or courtyard.
A platform lift may provide vertical access within a more concentrated area. However, its footprint still needs to be combined with approach space, landing arrangements and servicing access.
Compare both options against the actual site rather than assuming one is always preferable.
The assessment should consider who will use the route, whether assistance is needed and how the adaptation affects everyone else entering the property.
Confirm Building and Permission Requirements Early
An external lift proposal should include a check of the permissions and approvals relevant to the property.
Planning permission and Building Regulations approval are separate matters. GOV.UK advises checking the requirements for the particular building project and contacting a building control body where the position is unclear.
The lift’s location, associated building work and property circumstances should be reviewed before installation is arranged. In a rented or leasehold property, establish who can authorise changes to the building and surrounding land.
For projects in England, Approved Document M provides official guidance on access to and use of buildings, with separate volumes for dwellings and other buildings. The requirements relevant to your project should be confirmed rather than inferred from a product brochure.
Leave Room for Servicing and Everyday Use
The installation should remain accessible after it has been completed.
Ask which components engineers need to reach and whether any panels require clearance for removal. Fences, planters or storage placed beside the equipment later could restrict that access.
Consider everyday use of the surrounding area too. The lift should be planned alongside pedestrian routes, doors, bins and other features that need to remain accessible.
Our experienced team can discuss the proposed arrangement, preparation work and aftercare requirements before equipment is selected.
If your access needs also involve an internal staircase, customers in Wolverhampton can explore our stairlift installation and aftercare services as part of a wider assessment.
Find Out What Will Fit Your Property
The space needed for an external platform lift is the combined space for the equipment, its entrances and a usable route at every landing.
Before ordering, request a site-specific layout showing those elements clearly. It should explain how the intended user will approach, travel and leave the lift, together with any preparation work and maintenance clearances.
Contact DHG Services to discuss your property, the height difference and the access you want to create. A survey can establish which options are suitable and what the complete installation will require.
