Local planning policy field guide
Somerset Council planning policy summary
Explore Somerset Council’s planning requirements for common proposals, with the local tests, application evidence and official documents gathered in one place.
AI-generated from the linked official sources; not editorially reviewed. How these summaries are prepared.
- Local answers
- 11
- Official documents cited
- 7
- Planning sections
- 12
- Sources checked
- 5 September 2026
What this guide covers
A first source-verified selection of application evidence and common requirements across the Somerset Council planning area. The operative development plan still varies among the former Mendip, Sedgemoor, Somerset West and Taunton, and South Somerset areas; made neighbourhood plans, site allocations, policies maps and topic-specific guidance must be checked for the address. Exmoor National Park is outside Somerset Council's local-planning-authority area.
Popular checks
Start with a common planning question
Section 1
Consent, policy and location
Current development plan and policy hierarchy
What current plan documents and retained policies does the authority say form the development plan, and how should conflicts or transitions be handled?
Until a Somerset-wide local plan is adopted, the former-district plans continue to govern their respective areas: Mendip in the east, Sedgemoor in the north, Somerset West and Taunton in the west, and South Somerset in the south.
- When this answer applies
- Planning applications in Somerset Council's planning area, using the former district selected by postcode or the council's district map.
Details and exceptions
- Each area has multiple plan components, saved policies, allocations and made neighbourhood plans; the policies map and current plan status for the address must be checked.
- The Mendip Local Plan Part II was subject to a court judgment deleting five allocations, and a Limited Update adopted on 25 September 2025 provides replacement allocations.
Sources used
- Adopted Local Plans (opens in a new tab)Plan status— District selector and the current-plan introduction within each Mendip, Sedgemoor, Somerset West and Taunton, and South Somerset branch
Other planning topics11
Keep these national checklist topics in mind alongside the local requirements above.
- Neighbourhood plan applicability
- Site allocations and site-specific policy
- Design codes and masterplans
- Settlement boundaries
- Countryside development
- Green Belt development
- Local separation and green-wedge designations
- Planning permission and application route
- Permitted development and local limitations
- Prior approval requirements
- Article 4 directions
Section 2
Neighbour amenity
Other planning topics6
Keep these national checklist topics in mind alongside the local requirements above.
- Daylight, sunlight, overshadowing and overbearing impact
- Outlook and enclosure
- Privacy, overlooking and separation
- Noise and vibration
- Odour, fumes and dust
- Artificial light and glare
Section 3
Design, form and character
Character, context and placemaking
What does the authority say about responding to local character, townscape, context, public realm, legibility and inclusive or safe design?
Within the former Somerset West and Taunton area, the adopted Districtwide Design Guide seeks high-quality, healthy, inclusive and sustainable places and integrates climate resilience, energy efficiency and street layout with placemaking.
- When this answer applies
- Relevant planning proposals in the former Somerset West and Taunton district only.
Details and exceptions
- The SPD is a material consideration rather than development-plan policy and does not apply as a county-wide numerical design code; other former districts have their own guidance.
Sources used
- Somerset West and Taunton Districtwide Design Guide Supplementary Planning Document (opens in a new tab)SPD guidance— Official landing page, Introduction; adopted by Full Council on 7 December 2021
Related local appeal evidence
Area character and appearance
34 matched decision families in this local evidence view.
- 11 allowed
- 23 dismissed
Other planning topics8
Keep these national checklist topics in mind alongside the local requirements above.
- Layout, siting and building lines
- Scale, height and massing
- Side spacing and terracing
- Extensions
- Roof alterations and dormers
- Outbuildings and ancillary structures
- Materials and architectural detail
- Boundaries, frontages and entrances
Section 4
Residential quality and housing form
Other planning topics12
Keep these national checklist topics in mind alongside the local requirements above.
- Internal space standards
- Private amenity space
- Shared amenity and play space
- Accessible and adaptable homes
- Housing mix, size and density
- Older-person, care and supported housing
- Build to rent
- Student and co-living accommodation
- Annexes and ancillary accommodation
- Subdivision and flat conversion
- HMOs and room-based shared housing
- Infill, backland and garden development
Section 5
Movement, parking and servicing
Other planning topics10
Keep these national checklist topics in mind alongside the local requirements above.
- Access, highway safety and visibility
- Vehicle parking
- Accessible parking
- Cycle parking and storage
- Electric-vehicle charging
- Turning, emergency access and tracking
- Servicing, loading and deliveries
- Refuse and recycling storage and collection
- Active travel and public transport
- Transport impacts, mitigation and monitoring
Section 6
Heritage, archaeology and views
Other planning topics5
Keep these national checklist topics in mind alongside the local requirements above.
- Listed buildings and their setting
- Conservation areas
- Non-designated heritage assets
- Archaeology
- Historic landscapes and important views
Section 7
Nature, landscape and open space
Trees and tree preservation
What does the authority say about trees, root protection, replacement and protected-tree constraints?
A full application affecting trees requires an Arboricultural Impact Assessment and retention/removal plan, pre-development tree-work details, method-statement heads and an indicative protection plan, levels, service and construction details in root-protection areas, and compensatory soft landscaping, prepared by a suitably qualified arboriculturist.
- When this answer applies
- Full applications where trees could influence or be affected by development; a proportionate scaled-tree-plan package applies to householder development.
Details and exceptions
- For householder proposals, every relevant trunk must be accurately plotted and referenced with species, stem diameter at 1.5 m and retention/removal status; a TPO or conservation-area tree triggers the full-application evidence level.
Sources used
- Tree Survey or Arboricultural Assessment (opens in a new tab)Technical guidance— What the survey and statement should include, Full planning applications and Householder applications sections
Protected species
What does the authority say about surveys, avoidance, mitigation and licensing-related planning considerations for protected species?
Somerset's Biodiversity Checklist is used to determine whether a Wildlife or Ecology Survey must accompany the planning application.
- When this answer applies
- Proposals whose site, buildings, habitats or works may affect wildlife or protected species.
Details and exceptions
- The checklist is a screening step; survey type, season and mitigation depend on the species and site, and separate bat-SAC consultation-zone guidance may apply.
Sources used
- Information requirements for planning applications (opens in a new tab)Validation requirement— Additional guidance, Biodiversity Checklist section
Designated habitats and impact zones
What does the authority say about designated habitats, ecological networks, consultation zones and strategic mitigation areas?
Somerset identifies consultation zones and design guidance for development potentially affecting the North Somerset and Mendip, Exmoor and Quantocks, or Hestercombe House bat Special Areas of Conservation.
- When this answer applies
- Development within a mapped consultation zone for one of the three bat SACs.
Details and exceptions
- The public validation page does not state one universal distance or mitigation rule; the location, proposal type and current SAC technical guidance determine the assessment.
Sources used
- Information requirements for planning applications (opens in a new tab)Validation requirement— Special Areas of Conservation for bats – Technical Guidance section
Biodiversity net gain
What does the authority say about biodiversity-net-gain metrics, percentages, exemptions, delivery and monitoring?
Somerset's current guidance explains the statutory requirement for at least 10% biodiversity net gain for most liable development. Major residential development of at least 10 dwellings, or an unknown dwelling count on more than 0.5 ha, has been liable since 12 February 2024; small residential schemes of one to nine homes on less than 1 ha have been liable since 2 April 2024.
- When this answer applies
- Planning applications made after the relevant commencement date unless a statutory exemption or transition applies.
Details and exceptions
- Householder development, qualifying de-minimis impacts below 25 m² or 5 m of linear habitat, and qualifying self/custom-build schemes of no more than nine homes on no more than 0.5 ha are among the listed exemptions.
- The 10% rule is national law; Somerset's additional validation requirements and adopted technical guidance are the authority-specific elements.
Sources used
- Biodiversity Net Gain (opens in a new tab)Technical guidance— Biodiversity Net Gain basics, Major development, Small development and Exemptions sections
Other planning topics6
Keep these national checklist topics in mind alongside the local requirements above.
- Hedgerows
- Ancient woodland and veteran trees
- Nationally designated landscapes
- Landscape character and visual impact
- Local Green Space
- Green infrastructure, open space and recreation
Section 8
Flooding, environment and climate
Other planning topics11
Keep these national checklist topics in mind alongside the local requirements above.
- Flood risk and the sequential approach
- Drainage and sustainable drainage
- Coastal change and erosion
- Contaminated land
- Land stability and mining legacy
- Air quality
- Water environment, wastewater and nutrients
- Energy, carbon and sustainable construction
- Overheating and climate resilience
- Water efficiency
- Agricultural land and soils
Section 9
Housing delivery and contributions
Section 106 and infrastructure contributions
What does the authority say about planning obligations, infrastructure contributions, calculation and delivery?
Somerset uses section 106 obligations for site-specific mitigation and identifies different governing policies in each former district. A proposal can require both a section 106 agreement and Community Infrastructure Levy where the respective tests and charging rules apply.
- When this answer applies
- Development whose site-specific impacts cannot be made acceptable by condition, using the policy set for the former district.
Details and exceptions
- Mendip references DP9, DP11, DP12, DP16 and DP19; Sedgemoor D6, D13, D14, D30 and D34; Taunton Deane CP4, CP5 and D13; West Somerset CF1, R/5, R/6 and SC4; and South Somerset SS6, HG3, YV5, TA1, TA3, TA5, HW1 and HW2.
- The council says South Somerset policy HG4 is not currently applied, and individual plans may contain additional site-specific and nutrient-neutrality requirements.
Sources used
- Section 106 Agreements (opens in a new tab)Official guidance— Introduction and Why and when Section 106 Agreements may be required, including the five former-area policy lists
Other planning topics4
Keep these national checklist topics in mind alongside the local requirements above.
- Affordable housing
- Community Infrastructure Levy
- Viability
- Delivery, phasing and monitoring
Section 10
Application evidence and validation
Local validation list and core information
What does the authority say is required by its current local validation list, including forms, ownership notices, plans and core information?
Somerset's Local Validation Checklist, published 1 April 2025, says a valid application must include the applicable supporting information and correct fee; the council also requests a schedule or list of every submitted document.
- When this answer applies
- Planning applications submitted to Somerset Council.
Details and exceptions
- The checklist reflects both national requirements and the relevant former-area adopted plan; mineral and waste applications have local-area information requirements as well.
Sources used
- Information requirements for planning applications (opens in a new tab)Validation requirement— Somerset Local Validation Checklist and Mineral and Waste Applications sections
Heritage and archaeology evidence
What does the authority say about when heritage statements, impact assessments, appraisals and archaeological evidence are required?
A Heritage Statement is required for listed-building consent and planning applications affecting a designated or non-designated heritage asset or its setting, and should draw on the Historic Environment Record.
- When this answer applies
- Listed buildings, conservation areas, scheduled monuments, registered parks and gardens, registered battlefields, World Heritage Sites, non-designated assets and their settings.
Details and exceptions
- The statement should be prepared early and proportionate to significance so that heritage constraints inform the design.
Sources used
Trees, landscape, ecology and BNG evidence
What does the authority say about when tree, landscape, ecological, protected-species and biodiversity-net-gain evidence is required?
For a biodiversity-net-gain-liable application, Somerset requires extra validation material beyond the national minimum: wildlife/ecology and arboriculture reports, the biodiversity checklist and BNG statement, completed metric, plans and drawings, declaration form and a SHEP/HEP metric where necessary.
- When this answer applies
- Applications subject to the biodiversity gain condition.
Details and exceptions
- The requirements were adopted as a validation-checklist addendum on 14 February 2024; the associated guidance was updated to version 2 on 15 January 2025 and is a material consideration.
Sources used
- Biodiversity Net Gain (opens in a new tab)Technical guidance— Somerset Biodiversity Net Gain Validation Requirements and Somerset Biodiversity Net Gain Guidance Note sections
- Information requirements for planning applications (opens in a new tab)Validation requirement— Biodiversity Net Gain section
Flood, drainage and water evidence
What does the authority say about when flood-risk, sequential-test, drainage, SuDS, water-quality and wastewater evidence is required?
Somerset requires a flood-risk assessment for development in Flood Zones 2 or 3 and for works within 8 metres of a main river; a dedicated householder form is provided for relevant householder applications.
- When this answer applies
- Development in Flood Zones 2 or 3 or within 8 m of a main river.
Details and exceptions
- Other national and locally mapped flood-risk triggers may also apply; use current national and Somerset standing advice and the live flood mapping.
Sources used
- Information requirements for planning applications (opens in a new tab)Validation requirement— Additional guidance, Flood Risk Assessment section
Other planning topics8
Keep these national checklist topics in mind alongside the local requirements above.
- Design and Access and Planning Statements
- Transport, parking and travel evidence
- Ground and pollution evidence
- Energy, sustainability and climate evidence
- Affordable housing, viability and contributions evidence
- Construction, demolition and waste evidence
- Environmental Impact Assessment
- Fire statements and planning-gateway evidence
Section 11
Economic, community and specialist uses
Other planning topics22
Keep these national checklist topics in mind alongside the local requirements above.
- Employment sites and premises
- Retail, town centres and main-town-centre uses
- Community facilities
- Tourism and visitor accommodation
- Agriculture and farm diversification
- Rural workers' dwellings
- Equestrian development
- Traveller, Gypsy and showpeople sites
- Caravan, camping and holiday parks
- Aviation, airports and aerodrome safeguarding
- Telecommunications
- Advertisements and signage
- Shopfront design
- Solar energy
- Wind energy
- Battery energy storage
- Other renewable and low-carbon infrastructure
- Hazardous installations and pipelines
- Defence, radar and technical safeguarding
- Ports and strategic transport infrastructure
- Minerals
- Waste development
Section 12
Separate consents and private matters
Other planning topics6
Keep these national checklist topics in mind alongside the local requirements above.
- Building Regulations
- Party Wall matters
- Private rights to light
- Covenants, boundaries and ownership
- Highway licences and adoption
- Environmental and other permits
Source library
Official documents used
Every requirement above links to its supporting document and source location. Browse all of the cited Somerset Council sources together here.
Browse 7 cited documents
- Adopted Local Plans (opens in a new tab)Plan status
Somerset Council
- Information requirements for planning applications (opens in a new tab)Validation requirement
Somerset Council
- Biodiversity Net Gain (opens in a new tab)Technical guidance
Somerset Council · Adopted 14 February 2024
- Somerset West and Taunton Districtwide Design Guide Supplementary Planning Document (opens in a new tab)SPD guidance
Somerset Council · Adopted 7 December 2021
View official document page (opens in a new tab) - Tree Survey or Arboricultural Assessment (opens in a new tab)Technical guidance
Somerset Council
- Section 106 Agreements (opens in a new tab)Official guidance
Somerset Council
- Apply for listed building consent (opens in a new tab)Official guidance
Somerset Council