Selling Development Land in Wales | Development Land Wanted

How is planning in Wales different from England?

Wales has its own planning system. National policy comes from Planning Policy Wales, currently Edition 12, and Future Wales: the National Plan 2040, which has development plan status. Councils and national park authorities prepare Local Development Plans (LDPs). England's NPPF does not apply, and Planning Policy Wales puts placemaking at the centre of the system, so the quality of a scheme matters as well as the principle.

Several English tools have no Welsh equivalent: there is no grey belt, no Permission in Principle or brownfield land register, no Class MA conversion right and no mandatory biodiversity net gain metric. Instead, Planning Policy Wales expects development to deliver a net benefit for biodiversity. Councils must prioritise suitable and sustainable previously developed land, then suitable greenfield sites within or on the edge of settlements, with open countryside reserved for exceptional circumstances. Grades 1, 2 and 3a farmland are protected as the best and most versatile land.

Welsh green belts are defined by their openness and permanence, and green wedges are local designations, reviewed through the LDP, that serve a similar purpose. Our guide to Green Belt and grey belt land explains how England differs.

Future Wales sets the direction for development in Wales to 2040 and should be read alongside Planning Policy Wales. The Welsh Government published a monitoring and review report on it in March 2026.

How do LDP candidate sites work?

When a council starts a new or replacement LDP, it invites candidate sites. Submissions go on a candidate site register, pass an initial filter, and are then assessed in detail as the plan moves through its preferred strategy and deposit stages before independent examination.

Councils expect evidence up front: ownership, a site plan, access, flood checks against the Flood Map for Planning, ecology and an initial viability appraisal. Welsh Government guidance warns that weak evidence of delivery can be a reason to discount a site. Some councils set minimum site sizes and expect land allocated in the current plan without permission to be put forward again, and sites in or next to higher-risk flood zones may need a Flood Consequences Assessment at this stage. Our guide to local plans and call for sites covers the evidence in more detail.

How do TAN 15 and the Flood Map for Planning affect a site?

Technical Advice Note 15 governs development and flood risk, and the current version took effect on 31 March 2025. It works with the Flood Map for Planning, produced by Natural Resources Wales and updated every six months. The map shows Flood Zones 1, 2 and 3, surface water and small watercourse zones, and TAN 15 Defended Zones. Zone 1 carries the least risk, and the zones include allowances for climate change, so they show some areas expected to be at risk in future as well as today.

TAN 15 treats new homes as highly vulnerable development and is restrictive about them in Zones 2 and 3. Councils must notify Welsh Ministers before approving certain highly vulnerable development in Zone 3. A Defended Zone is not a presumption in favour of development, and a Flood Consequences Assessment is required there. Check the map before anything else.

What do phosphates mean for development near river SACs?

Natural Resources Wales set tighter phosphorus targets for river Special Areas of Conservation (SACs) in 2021. Its compliance assessment found many waterbodies failing, including in the Usk, Wye, Cleddau and Teifi catchments, with more localised failures on the Dee. Others, such as the Tywi, pass but with limited headroom.

In affected catchments, any development that might increase phosphate, including new homes and changes of use that create homes, must be screened under the Habitats Regulations. Where there is a risk, applicants may need a nutrient budget, using the All Wales Nutrient Budget Calculator, and mitigation that is evidenced, maintained, monitored and legally secured for the long term. That adds cost and time, and a buyer will take it into account. Natural Resources Wales warns that even passing waterbodies may have limited headroom, so check the latest advice for your catchment.

Does the Welsh language affect planning?

Yes, mainly through the LDP. Under Technical Advice Note 20, councils must assess the likely effects of their plans on the Welsh language as part of the sustainability appraisal. Planning applications should not routinely need a Welsh language impact assessment, but one may be carried out for large windfall schemes, normally 10 or more homes, in areas the LDP defines as linguistically sensitive or significant. Any mitigation is secured through conditions or planning obligations, and planning policies cannot control who occupies homes on linguistic grounds. Ask the council's planning policy team whether your area has been defined in this way, and whether its LDP or supplementary guidance sets a local threshold for assessment.

What else should Welsh landowners know?

Permission lasts longer: a standard planning permission in Wales usually allows five years to start work, compared with three in England.
Decision periods: the standard period is eight weeks from a valid application, which can be extended by written agreement.
Drainage: since 7 January 2019, developments of more than one home, or with a construction area of 100 square metres or more, need sustainable drainage approved by the council's SuDS Approving Body before work starts.
Land Transaction Tax: LTT replaced Stamp Duty Land Tax in Wales from 1 April 2018. The buyer pays it to the Welsh Revenue Authority, with the return and payment due within 30 days after completion. Separate rates apply to residential and non-residential property, which includes agricultural land.
Your own tax: capital gains tax on a sale is a UK tax, so speak to a tax adviser before agreeing terms.

What is the Planning (Wales) Act 2026?

The Planning (Wales) Act 2026 and the Planning (Consequential Provisions) (Wales) Act 2026 received Royal Assent on 27 April 2026. The main Act brings Welsh planning legislation together in a single bilingual Act, with 15 Parts covering subjects such as the development plan, planning permission, enforcement, planning obligations and appeals. The Welsh Government describes it as a technical consolidation to improve clarity, not a change of policy.

A few introductory provisions came into force on 28 April 2026. The rest will be brought into force by order, with commencement expected around October 2027. Until then, the existing legislation continues to apply, so nothing changes yet for landowners.

How do we buy land in Wales?

We buy development land in Wales on the same basis as in England: outright, through a subject-to-planning contract, by option or through a joint venture. We consider all site sizes, from single plots to strategic sites for 50 or more homes, with or without planning permission. Our site appraisal is free and carries no obligation, there is nothing to pay us, and on option agreements we pay your reasonable legal costs, with a cap agreed in heads of terms. Read about how we buy, and take independent Welsh planning, legal and tax advice.

Questions

Is there grey belt land in Wales?

No. Grey belt is part of England's NPPF only. Wales has no grey belt, and Welsh green belts and green wedges are designated through development plans under Planning Policy Wales. If your land is in a Welsh green belt or green wedge, the Local Development Plan is the place to start.

How long does planning permission last in Wales?

A standard planning permission in Wales usually gives five years to begin development, unless a condition sets a different period. In England, the standard period is three years. The longer Welsh period can help a buyer plan surveys, technical approvals and funding before starting work on site.

Who pays Land Transaction Tax when I sell?

The buyer pays Land Transaction Tax, which replaced Stamp Duty Land Tax in Wales from 1 April 2018. It is collected by the Welsh Revenue Authority, with the return and payment due within 30 days after completion. As the seller, you may still have capital gains or other tax to consider.

Will phosphates stop my site being developed?

Not necessarily. It depends on the catchment, the wastewater treatment serving the site and whether mitigation can be provided. In failing river SAC catchments, new homes must show they will not add to phosphate levels, which adds cost and time. Check with Natural Resources Wales and your council early.

Sources

This guide is general information, not legal, planning or tax advice. Always take independent professional advice on your own circumstances.

Selling development land in Wales: planning, flooding, phosphates and LTT