Open space assessment or play space assessment
The two assessments overlap on the site plan and diverge in method. Child yield, age band walking distances and maintenance liability decide which one your scheme needs.
An Open Space Assessment answers a quantum question: how much usable outdoor space does the scheme provide, of what type, and how does that sit against the council's adopted standards for the area. A Play Space Assessment answers a demographic one: how many children will live here, in which age bands, and does the layout give each band somewhere to play within a walkable distance. They overlap on the site plan and diverge completely in method, which is why submitting one when the officer wanted the other is a common cause of a request for further information.
The dividing line is the child yield calculation. If your evidence needs it, you are writing a play space assessment.
What each assessment measures
Open space covers amenity greenspace, parks, natural and semi-natural areas, allotments, outdoor sports provision, churchyards and civic space. The assessment usually sets the scheme's provision against the typologies and quantity standards in the local plan or an open space study, then deals with quality and accessibility.
Play space is a subset with its own rules. It is assessed by the number of children the development will generate, split into age bands, and by whether provision for each band lies within an accepted walking distance of the homes. A scheme can meet an open space standard in square metres and still fail on play, because the space is in the wrong place or is not playable.
| Open Space Assessment | Play Space Assessment | |
|---|---|---|
| Driving calculation | Area per dwelling or per 1,000 population against local standards | Child yield by age band, then area per child |
| Typical trigger | Any residential scheme above the council's threshold | Schemes generating a measurable child population |
| Evidence base | Local plan standards, open space study, audit of existing provision | Population yield calculator, age band distance standards |
| Design consequence | Quantum, typology mix and where deficiency exists | Location, overlooking, equipment and surfacing |
| Shortfall remedy | Off-site contribution or improvement to existing space | On-site provision preferred, contribution where on-site provision is impossible |
Child yield and why it changes the answer
Child yield is derived from the housing mix, not from the unit count. A scheme of 40 one-bedroom flats and a scheme of 40 four-bedroom houses produce very different numbers of children, and the second one needs play provision the first may not. In London the population yield calculator published by the Greater London Authority is the expected tool, and the London Plan 2021 policy S4 sets the provision standard of at least 10 square metres of playable space per child.
Outside London, authorities use their own multipliers drawn from census data and local housing surveys. Ask the council which yield source it accepts before running the numbers, because using a different one is the fastest way to have the whole assessment set aside.
The age bands drive the layout. Doorstep playable space for under-fives is expected within a short walk of the front door, typically around 100 metres. Provision for five to eleven year olds sits further out, and for teenagers further still. Those distances are what force play space into the middle of a layout rather than onto the leftover corner by the attenuation basin.
Quantity, quality and accessibility
All three limbs matter, and applicants who only answer the first get pushed back.
Quantity is the arithmetic. Quality is whether the space works: dimensions that allow a game, gradients that are usable, planting that does not swallow the space in five years, and surfacing appropriate to the equipment. Accessibility is about routes, severance by roads, gates, and whether the space reads as public or as private frontage.
Overlooking is the quality point that decides most play spaces. A play area with no active frontage will be flagged by the officer, the police designing-out-crime adviser and the neighbours in turn. Put habitable room windows onto it and the objection usually falls away.
London and the rest of England
London has the most prescriptive framework, because the London Plan sets both the standard and the method, and boroughs add their own detail through supplementary guidance on play and informal recreation. A referable scheme will have its play provision tested in detail, including the age band breakdown and the distance analysis.
Outside London the picture is looser and more local. Some authorities carry detailed play standards in an adopted supplementary planning document. Others rely on a general open space policy and negotiate at application stage. Where the local plan is silent on play specifically, the assessment should say so and use a recognised benchmark, explaining the choice. That candour is better received than borrowing a London standard without explanation.
On-site provision against a financial contribution
Councils prefer on-site provision. A contribution is a fallback where on-site provision is not possible, and it has to satisfy the tests in regulation 122 of the Community Infrastructure Levy Regulations 2010: necessary to make the development acceptable, directly related to it, and fairly and reasonably related in scale and kind.
Where a council charges the levy, check what it already funds before agreeing to a separate obligation, because double-charging for the same infrastructure is not lawful and is more common than it should be. Set out in the assessment exactly which shortfall the contribution addresses and which existing space will be improved with it.
On a constrained urban site the honest answer is sometimes that full on-site play provision cannot be made without losing the scheme. Say that, evidence it with a layout study, and propose the alternative. The version that pretends a 30 square metre courtyard is a doorstep play space does not survive the case officer's site visit.
Maintenance and who ends up paying
Both assessments need a maintenance answer, and play space is harder. Equipment carries inspection obligations, replacement cycles and liability, so councils are cautious about adopting it. The usual outcomes are adoption with a commuted sum covering a defined period, or retention by a management company funded through an estate charge.
Price that in early. A commuted sum for play equipment can reshape a small scheme's appraisal, which is why play provision belongs in the viability discussion from the start rather than as a late addition. The same sequencing argument applies to the choice covered in viability at plan making or at application stage.
Design consequences worth fixing before submission
Three recurring problems turn up in both assessments.
- Space that is technically compliant but unusable, such as a long thin strip beside a spine road, or a flat area that is actually the attenuation basin's design flood extent.
- Provision counted twice, once as amenity open space and once as play space, without any acknowledgement that the same square metres are doing both jobs.
- Distance analysis measured as the crow flies rather than along walkable routes, which falls apart as soon as the officer measures it properly.
The remedy for all three is to test the layout against the assessment before the drawings are finalised, particularly on smaller schemes where the choice between outline and full permission also affects how much of this must be resolved now, as set out in outline or full permission for a small residential site.
PlanScope drafts both an Open Space Assessment and a Play Space Assessment structured to the sections councils expect, flagging where site-specific figures such as child yield and adopted standards need to be inserted. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.
This is general guidance, not legal advice. Confirm the applicable standards and yield method with your local planning authority before relying on them.
Frequently asked questions
Does every residential scheme need a play space assessment?
No. It depends on whether the housing mix generates a child population and on the council's threshold for provision. Schemes of small flats may generate little child yield and can be dealt with in the open space assessment. Family housing almost always triggers a separate play assessment, and in London the London Plan standard applies directly.
How is child yield calculated?
From the housing mix rather than the unit count, using multipliers for each dwelling size and tenure. The Greater London Authority publishes a population yield calculator that London boroughs expect applicants to use. Outside London, authorities apply their own multipliers drawn from census data, so ask the council which source it accepts before running the figures.
Can play space be provided as a financial contribution instead?
Sometimes, where on-site provision is impossible on a constrained site. The contribution must meet the tests in regulation 122 of the Community Infrastructure Levy Regulations 2010, and the assessment should identify the specific shortfall and the existing space to be improved. Check the levy charging schedule first to avoid paying twice for the same infrastructure.
How far can play space be from the homes it serves?
Distance standards are set by age band, with doorstep provision for the youngest children expected within a short walk, typically around 100 metres, and provision for older children and teenagers further out. Measure along walkable routes rather than in a straight line, because the case officer will. Severance by a road usually breaks the route.
Who maintains play equipment after the development is finished?
Either the council adopts it with a commuted sum covering a defined maintenance period, or a management company retains it funded by an estate charge. Councils are cautious about adopting equipment because of inspection obligations and liability. Settle the route before viability is fixed, since a commuted sum can reshape the appraisal for a small scheme.
Sources and further reading
This article is general guidance about the planning system in England and, where stated, the rest of the UK. It is not legal or professional advice. Check your local planning authority’s validation requirements and take professional advice for your specific site.