Cyngor Bro Morgannwg
Vale of Glamorgan Council

Dear Sir/Madam,

I write to formally object to the above planning application for 250 new dwellings in Dinas Powys.

My objection is based on material planning considerations, specifically the severe and unacceptable impact on highway safety, traffic congestion, flood risk, and local infrastructure capacity including healthcare and education provision.

1. Highway Capacity & Traffic Congestion (Cardiff Road)

Cardiff Road is already operating beyond practical capacity. At peak times, traffic is routinely slow-moving or stationary, with regular congestion through the village centre. The addition of vehicles associated with 250 new dwellings would significantly exacerbate this situation.

Even using conservative estimates of 1.5–2 vehicles per household, this proposal could generate 375–500 additional vehicles, with a substantial number using Cardiff Road as the primary route in and out of the village. This would:

Increase congestion and journey times

Worsen air quality in an already slow-moving corridor

Reduce highway safety for pedestrians and cyclists

Create additional pressure at key junctions

Unless robust and independently verified traffic modelling demonstrates otherwise, the development would have a severe residual cumulative impact and should therefore be refused.

2. Flood Risk & Drainage Concerns

Parts of Dinas Powys have a known history of surface water and localised flooding during periods of heavy rainfall. Residents are aware of drainage systems becoming overwhelmed and roads affected during significant weather events.

The addition of 250 dwellings, associated hard surfacing, roads, and driveways will inevitably increase surface water runoff. Unless there is clear, deliverable, and guaranteed drainage infrastructure with long-term maintenance arrangements, this proposal risks exacerbating existing flooding issues. Given increasing extreme weather events linked to climate change, it is essential that flood risk is robustly addressed and not underestimated.

3. GP Surgery Capacity

The local GP surgery in Dinas Powys is already operating at or beyond capacity. Residents frequently struggle to obtain same-day appointments, demonstrating that healthcare provision is stretched.

An additional 250 dwellings could introduce approximately 600+ new residents. Without secured and deliverable healthcare expansion, the proposal would place unacceptable strain on primary care services and fails to ensure adequate supporting infrastructure.

4. School Capacity

Local primary and secondary schools serving Dinas Powys are already heavily subscribed. Many year groups are full, and places are limited.

An influx of families from 250 new homes would significantly increase demand for school places. Without guaranteed additional classroom capacity, staffing, and infrastructure improvements secured through planning obligations, this development risks placing further strain on an already pressured education system.

5. Unrealistic Assumptions Regarding Rail Use

Any suggestion that traffic impact will be mitigated by residents using rail services is speculative. Car dependency in Dinas Powys remains high for commuting, school runs, shopping, and everyday family life.

There is also no practical pedestrians access available from the proposed site and parking in the station is very limited and even more limited in the residential streets nearby which are currently not permit holder only.

The presence of a railway station does not equate to sufficient modal shift to offset hundreds of additional vehicle movements. Without enforceable and evidence-based transport mitigation, this assumption should not be relied upon.

Conclusion

For the reasons outlined above, I respectfully request that this application be refused on the grounds that it would:

Result in a severe residual impact on highway safety and congestion

Exacerbate existing flood risk and drainage pressures

Place unacceptable strain on already overstretched GP services

Increase pressure on full local schools

Rely on unrealistic transport assumptions

This development, in its current form, does not appear sustainable given the existing infrastructure constraints within Dinas Powys.

I ask that this objection be fully considered in the officer’s report and, if the application proceeds to committee, that members give significant weight to the cumulative infrastructure pressures already experienced by residents.