Southbourne Allocation Development Plan Document - Regulation 19 Consultation

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Appendix A – Infrastructure Delivery Plan (IDP) Update

As part of the development of the Southbourne DPD, relevant infrastructure providers were contacted to provide an update to the IDP (vis-à-vis the IDP prepared in support of the CLP) for Southbourne Parish, accounting for potential funding, project, and infrastructure requirement changes. Below represents the most up to date information provided as a result of this update. The update is predicated on the specific allocation option set out in the DPD. Some new infrastructure provision has been identified, which is a result of the DPD having identified a specific allocation, generating some specific infrastructure needs, which was not something that could be established at the time the CLP was prepared, as that was based upon a Broad Location for Development, meaning some of the more site specific infrastructure needs were not yet known. This update has been factored into the viability evidence prepared in support of this DPD. Comment

Infrastructure Category

Scheme (what)

(Schemes marked with * are ‘new’ projects identified as part of the process of producing the Southbourne Allocation DPD)

Justification/Rationale

Phasing (when)

Total Estimated Infrastructure Cost

Sources of funding

Delivery Lead

(who/whom)

Priority in delivering SADPD

Transport

Foot/cycle bridge over Railway line (between Cooks Lane site and Priors Orchard)*

Modal Shift, Social cohesion and connection to wider active travel network.

Flexible

installation

dependent on

delivery timing of

development

£1,200,000 - £9,000,000 (depending on level of accessibility)

S106/CIL

Network Rail

Essential

Transport

Inlands Road level crossing upgrade*.

Safety – Inlands Road crossing is currently a single arm barrier. Development on the east would require upgrades to a double arm barrier to improve safety.

Delivery when the sections of the development which have a vehicular access onto Priors Leaze Lane and Inlands Road are developed.

Approximately £6,000,000

S106

Network Rail

Essential

Transport

Bourne Active Travel Scheme (Previously ChEm Route) (this is an updated version of the entry in the IDP produced in support of the adopted Local Plan)

To improve the safety of cyclists and pedestrians, whilst also maintaining the A259’s function as a strategic diversion route for the A27.

To encourage active modes of travel between Chichester and Emsworth.

This is a wider scheme, the expectation is that the development will make a contribution towards a part of it.

To be completed over the Adopted Local Plan period

Overall cost £11m to £15m

S106 (proportionate contribution)

WSCC

High

Transport

Southbourne bus service improvements/extension* (this is an updated version of the entry in the IDP produced in support of the adopted Local Plan)

To integrate bus services into the initial phases of development to help create strategic options for behavioural changes and mode choice.

Staged infrastructure rollout dependent on delivery timing of development

TBA following commercial engagements with operators by developers

S106

WSCC, Bus Operators

High

Transport

Southbourne train station access improvements*

Provision of improvements to access, ensure congestion reduction and promote the shift from the use of cars to more sustainable public transport.

Staged infrastructure dependent on delivery timing of development

TBA following developer engagements with Network Rail.

CIL

Network Rail, WSCC

High

Transport

A259 Southbourne bus stop improvements* (this is an updated version of the entry in the IDP produced in support of the adopted Local Plan)

Potentially providing secure cycle parking and facilities such as shelters and real time information for user connectivity, comfort and convenience enabling the switch from cars to public transport for sustainability, thereby reducing congestion, air pollution and noise levels.

Flexible installation dependent on delivery timing of development

TBD subject to further developer engagements with bus operators.

CIL

WSCC

High

Upgrade of footpaths linking Nutbourne, Broadbridge, Fishbourne, Bosham, Apuldram, Westbourne, Woodmancote (with existing bridleway extension), Southbourne and Emsworth together with uncontrolled crossings at road points

(IBP/1168)

Provision of improvements to access and promote the shift from the use of cars to active travel.

Dependent on timing of development

TBD – depends upon exactly which routes need to be upgraded and to what extent.

CIL

WSCC

Essential

Total Transport Costs

Up to £30,000,000

Education

Primary

Serviced Land for a 1 form entry expandable to 2FE primary school core buildings, Special Support Centre (SSC) and Early Years, and pro rata share of the build costs would be required.

(this is an updated version of the entry in the IDP produced in support of the adopted Local Plan)

(IBP/1027)

Based on current figure of 800 homes, plus changes to the birthrate and other factors, the requirement for a Primary School at Southbourne has been reassessed.
Currently the requirement for mitigation of 800 homes is for a 1FE primary school. However, due to Department of Education advice WSCC do not provide 1 FE schools in West Sussex. Therefore, the requirement for the DPD is for a 1FE school expandable to 2FE. Therefore, 2FE core buildings with 1FE provision which is a land requirement of 2.22 ha including SEND and standalone Early Years provision.

2ha for school and 0.05ha for attached SSC – 2.05ha required.

With development (after the provision of 500 units)

£8.76m

S106 (on site provision)

WSCC/ Developer

Essential – dependent on development delivery and need for places

Secondary

Expansion of Southbourne secondary school may be possible. Contributions would be required for expansion of secondary schools if feasible and required.

(IBP/1199)

WSCC calculator based

CIL

WSCC

Essential

Sixth form

Contributions would be required for expansion if feasible and required

IBP/1200)

WSCC calculator based

CIL

WSCC

Essential

Early Years and Childcare places

60 places provided as part of the new primary school.

(IBP/1028)

At the current time early years and childcare sufficiency planning indicates that there is insufficient space within existing provision to serve this proposed development.

Required as part of site allocation, 0.17ha.

£2,520,000

S106 (on site provision)

Developer

Essential – Dependent on development delivery and need for places

Special Educational Needs & Disability

To be provided as part of the new primary school.

(IBP/1092)

£TBC

S106 (on site provision)

Developer

Essential

Total Education Costs

£11,280,000

Health

See Plan Area Wide Health Infrastructure Needs

Wider Plan Health Infrastructure Needs

Improvements at Southbourne Surgery (increase number of clinic rooms by extending)

(IBP/726)

Approved at Cabinet on 04.11.2025

Housing increase and directly associated GP registration. Project time frame paused so as to align to Willow Park (IBP/115) delivery.

2027-2028

£450,000

CIL

GP Practice Manager & Integrated Care Board

Already selected for inclusion in the CIL spending plan[5]

Total Health Costs

Social Infrastructure

1 New Community Hall of sufficient size to accommodate a variety of recreational and social activities – a minimum of 18m x 10m, capacity of around 150 – 200 seated, with small meeting room, kitchen, storage and toilet facilities commensurate with size, with provision for disabled users and car parking. Overall a net minimum of 666 sq m. Provision should be able to accommodate a badminton court.

(IBP/885)

Open Space. Indoor Sports & Playing Pitch Strategy 2024

£2,000,000

S106 (on site provision)

Developer

Essential

Sport and Leisure Facilities

See Plan Area Wide Social Infrastructure Needs

Total Social Infrastructure Costs

£2,000,000

Green Infrastructure

Allotments

(IBP/1030)

Open Space calculator based.

Estimated provision of 496 sqm of allotments to meet future demand from increased population (subject to number of units applied for and the proposed housing mix)

In line with phasing of site development

£169,926

S106 (on site provision)

Developer

Essential

Amenity/Natural open space

(IBP/1031)

Open Space calculator based.

Approx Provision of 10,765 sqm of amenity green space and 19,875 sqm of natural green space to meet future demand from increased population

(subject to number of units applied for and the proposed housing mix)

In line with phasing of site development

£299,772

S106 (on site provision)

Developer

Essential

Parks & Recreation Grounds

(IBP/1032)

Open Space calculator based.

Approx Provision of 19,874 sqm of parks and recreational grounds to meet future demand from increased population

Includes sports pitches, comprising 1 full size Artificial Grass Pitch, 1 youth pitch (natural grass) and two mini/junior football pitches (natural grass) and one Multi Use Games Area. All as per Sport England cost estimates.

(subject to number of units applied for and the proposed housing mix)

In line with phasing of site development

£3,845,964

S106 (on site provision)

Developer

Essential

Play Space (Children & Youth)

(IBP/1033*)

Open Space calculator based.

Approx Provision of 1,242 sqm of play space for children and 1,242 sqm for youth to meet future demand from increased population

(subject to number of units applied for and the proposed housing mix)

In line with phasing of site development Developer

£389,054

S106 (on site provision)

Developer

Essential

Total Green Infrastructure Costs

£4,704,716

Habitats Regulations Mitigation

Bird Aware Solent[6]

Mitigation for the impact of recreational

activities arising from development in

the Special Protection Areas

(Solent-wide Wardens)

£654,323

S106

Bird Aware Solent

Essential

Nutrient Mitigation

Habitats Regulations (calculation based on Local Plan nutrient budget)

TBD

S106

Developer

Essential

Total Habitats Regulations Mitigation

£654,323

Public Services

Library facilities – remodelling of existing Southbourne library

(IBP/1034)

To accommodate impact of new residents from allocation.

£606,922

CIL

WSCC

High

Police

See Area Wide Public Services

Total Public Services Costs

£606,922

Utility Services

Sewerage network reinforcement

To ensure the efficacy and resilience of the network.

Southern Water have stated that this will need further consideration at the Planning Application stage.

In line with phasing of site development

Based on new connection charge plus site specific costs

Southern Water

Southern Water

Critical

Thornham Sewage Treatment Works – Capacity Increase

Further to a report to Development Plan and Infrastructure Panel on the 15 October 2025 , and written confirmation from Southern Water and the Environment Agency, the Thornham Position Statement has been withdrawn with immediate effect because Southern Water has confirmed funding to increase treatment capacity at the Thornham Wastewater Treatment Works. This scheme is identified as a priority and must be completed before 2030.

2025 - 2030

Now fully funded

Southern Water

Southern Water

Critical – but now fully funded.

Total Utility Services Costs

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