The Welsh language as a material planning consideration
Section 31 of the Planning (Wales) Act 2015 made the Welsh language a material consideration in Welsh planning decisions. Here is when an assessment is needed and what it must cover.
In Wales, and only in Wales, the Welsh language is a material planning consideration by statute. Section 31 of the Planning (Wales) Act 2015 amended section 70 of the Town and Country Planning Act 1990 so that considerations relating to the use of the Welsh language may be taken into account when a Welsh planning authority determines an application. Nothing equivalent exists in England, Scotland or Northern Ireland, and an English-trained agent who treats a language objection as immaterial will get a surprise at committee.
This article deals with Welsh applications only. The framework is Planning Policy Wales and its Technical Advice Notes, not the National Planning Policy Framework.
Where the duty comes from in Welsh planning law
Three pieces of legislation sit behind the position. The Planning (Wales) Act 2015 makes the language a permitted material consideration in decision taking. The same Act, working through the Planning and Compulsory Purchase Act 2004, requires the sustainability appraisal of a local development plan to assess the likely effects of the plan on the Welsh language. And the Well-being of Future Generations (Wales) Act 2015 sets a well-being goal covering Welsh culture and the Welsh language, which public bodies including planning authorities must work towards.
Layered over that, the Welsh Language (Wales) Measure 2011 imposes standards on public bodies covering how they operate and deliver services bilingually. Those standards shape how an authority consults on an application rather than how it decides one, but they explain why documents and notices appear in both languages.
Technical Advice Note 20, Planning and the Welsh Language, is where the practical method sits. It is guidance rather than law. Welsh authorities follow it closely.
When a language impact assessment is expected
The trigger is not national. Technical Advice Note 20 asks local development plans to identify where the language is a particular sensitivity, and to set out when a Welsh language impact assessment will be required with an application. So the answer for any given site is in the adopted local development plan and any supplementary planning guidance the authority has issued alongside it.
In broad terms, assessments are sought for residential schemes above a locally set size in communities with a high proportion of Welsh speakers, for developments that would bring a substantial number of new residents or workers into such a community, and for schemes that would remove a facility with a language function, such as a chapel, a pub or a shop used through the medium of Welsh.
Small infill, householder work and most commercial change of use will not attract one. A 60 house allocation release in Gwynedd or Ceredigion almost certainly will.
Thresholds set by local development plans
There is no single national unit number, and any agent who tells you there is has not read the plan. Each authority sets its own trigger, often expressed as a number of dwellings, sometimes as a proportion of the existing housing stock in the community, sometimes tied to a designated language sensitive area shown on the proposals map.
Read the plan policy, the reasoned justification underneath it, and the supplementary guidance. Then check whether the authority has published a template or a scoping note, because several have, and using the authority's own structure saves a round of comments. If nothing is published, ask for a pre-application discussion and get the scope agreed in writing before the work starts.
Where the plan is out of date or under review, the position gets harder. The emerging plan can carry weight and the sensitivity mapping may have changed.
What the assessment has to measure
A language impact assessment is a piece of social analysis, not a design statement. It needs a baseline, a prediction and a mitigation package.
The baseline uses census data at community and ward level, school census information on Welsh-medium education, and local evidence about the language in daily use. Community and ward level tables matter because a county average hides the variation that decides these cases.
The prediction covers:
- How many new households or workers the scheme will bring, and where they are likely to come from.
- The likely linguistic composition of those households, reasoned from the housing mix and price points rather than assumed.
- Effects on Welsh-medium school capacity in the catchment, including whether additional places would be needed.
- Effects on services, clubs and facilities that operate through the medium of Welsh.
- The cumulative position when other committed development in the same community is added.
Reasoning matters more than the arithmetic. An assessment that projects household numbers accurately and then asserts a neutral language effect without explaining why will be treated as incomplete. Setting out the reasoning is the same discipline a good Planning Statement applies to any policy test.
Mitigation that Welsh authorities accept
Mitigation is where applications are won and lost. The measures that appear repeatedly in Welsh decisions include phasing delivery so that in-migration is spread over years rather than months, adjusting the housing mix towards smaller units and affordable tenures that local households can access, and reserving an initial marketing period for people with a local connection.
Beyond housing, authorities look for measures that put the language into the development itself. Welsh street and development names agreed with the authority's naming procedure. Bilingual signage on any commercial element. Contributions towards Welsh-medium school places where the assessment shows a capacity effect. Commitments on bilingual recruitment and customer service for employment schemes.
None of that is a tick list. The measures have to respond to the effect the assessment identified, which is why a weak baseline produces weak mitigation. Where community involvement has been meaningful, the Statement of Community Involvement is the place to show what local Welsh speakers actually said and how the scheme changed.
Securing mitigation by condition or obligation
Phasing, signage and naming are usually conditioned. Financial contributions and local occupancy arrangements need a planning obligation, and in Wales that is a section 106 agreement in the same form as England.
Two drafting points come up often. First, a local connection marketing period has to be defined precisely: how long, who qualifies, what evidence, and what happens when no qualifying buyer comes forward. Vague drafting produces a clause that nobody can enforce. Second, an education contribution has to be tied to identified Welsh-medium capacity rather than to school places generally, or it will not meet the test of being necessary and directly related to the development.
Design and access material should carry the language point through as well. Where a Design and Access Statement is required, naming, signage and the treatment of any community space are legitimately part of it.
Objections framed in language terms
Representations about the language are material in Wales, so they have to be considered. Weight is for the decision maker, and it will depend on the evidence rather than the volume of letters.
There is a line, and officers hold it. An objection arguing that a scheme's scale and pace would change the linguistic balance of a small community is a planning argument supported by policy. An objection that amounts to hostility towards individuals because they are not Welsh speakers is not a material consideration, and treating it as one would put the authority on the wrong side of equality law.
Applicants who engage early do better. Bringing a draft assessment to a pre-application meeting, and to the community council, tends to convert a language objection into a negotiation about phasing and mix.
One honest caveat. Welsh language planning practice moves through local development plan reviews and through appeal decisions rather than through frequent national policy change, so check the current edition of Planning Policy Wales and the authority's own guidance before you rely on anything here.
PlanScope's drafting is grounded in English national policy and English local plans, so a Welsh application needs the reviewer to check Planning Policy Wales and the relevant Technical Advice Notes before submission. You can browse the report types to see which supporting documents a Welsh scheme is likely to need.
This is general guidance, not legal advice; check the position with your local planning authority or a qualified professional before relying on it. PlanScope provides AI-assisted draft reports for planning applications. Reports should be reviewed before submission. We do not guarantee planning approval.
Frequently asked questions
Is the Welsh language a material planning consideration?
In Wales, yes. Section 31 of the Planning (Wales) Act 2015 amended section 70 of the Town and Country Planning Act 1990 so that considerations relating to the use of the Welsh language may be taken into account in determining applications in Wales. No equivalent provision applies in England, Scotland or Northern Ireland, so the point is jurisdiction specific.
When is a Welsh language impact assessment required?
When the adopted local development plan says so. Technical Advice Note 20 asks plans to identify language sensitive areas and set the circumstances and scale at which an assessment is expected. Triggers differ between authorities and may be expressed as a number of dwellings, a proportion of existing stock, or a mapped sensitivity area. Check the plan and any supplementary guidance.
What does a Welsh language impact assessment contain?
A baseline drawn from census and school census data at community and ward level, a prediction of the number and likely linguistic composition of incoming households or workers, effects on Welsh-medium school capacity and on services operating through the medium of Welsh, a cumulative assessment with other committed development, and a mitigation package responding to the effects identified.
What mitigation do Welsh authorities accept?
Phasing delivery so in-migration is spread over time, adjusting housing mix and tenure towards local need, local connection marketing periods, Welsh development and street naming, bilingual signage, contributions to Welsh-medium education capacity where the assessment shows an effect, and bilingual recruitment commitments on employment schemes. Measures must respond to the identified effect rather than being generic.
Can neighbours object on Welsh language grounds?
They can, and the objection is material in Wales. Weight depends on evidence rather than the number of letters. An argument that the scale and pace of a scheme would change the linguistic balance of a community is a planning argument. Hostility towards individuals because they do not speak Welsh is not material and cannot be given weight.
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.