Journey

SME housebuilder planning guide

Comprehensive planning guidance for small and medium housebuilders. Learn how to navigate the planning system efficiently, take advantage of small site easements, and manage S106 and environmental requirements proportionately.

Construction & Property Starting Updated 3 November 2026

What you will learn

This journey is specifically for SME housebuilders - developers building schemes of 1-50 homes. The planning system can seem designed for volume builders, but there are increasingly proportionate approaches available for smaller schemes.

By the end of this journey, you will understand:

How site thresholds affect your planning requirements
Small site easements that can reduce costs and complexity
How to manage S106 negotiations proportionately
BNG compliance options for smaller schemes
When nutrient neutrality applies and how to achieve it
How to discharge conditions efficiently

Understand the threshold effects
Planning requirements change significantly at key thresholds. The most important are:
- 1-9 units (minor): 8-week determination, simpler documentation, often below affordable housing thresholds
- 10+ units (major): Under current law, major development starts at 10 dwellings - 13-week determination and full major development requirements
- 10-49 units (medium): The National Planning Policy Framework (August 2026) treats these schemes as medium development, a policy sub-set of major development on sites of up to 2.5 hectares. Medium is not a statutory category, so the major development rules and the 13-week decision period still apply
Site threshold definitions

Understand the official definitions of minor, medium, and major development.
Planning applications in England are classed by size. The statutory definition of major development sets the period the local planning authority has to decide the application. The National Planning Policy Framework and national planning guidance use their own definitions of major and medium housing development for policy.

Statutory definition of major development
Article 2 of the Town and Country Planning (Development Management Procedure) (England) Order 2015 defines major development as development involving any one or more of:
winning and working minerals, or the use of land for mineral-working deposits;
waste development;
10 or more dwellinghouses, or, where the number is not known, a site of 0.5 hectares or more;
a building or buildings creating 1,000 square metres or more of floor space;
development on a site of 1 hectare or more.
Everything else is not major development.

Major development - dwellings

10 or more

Major development - floor space

1,000 sq m or more

Major development - site area

1 hectare or more

Major development - decision period

13 weeks

Not major - decision period

8 weeks

Policy definitions
The National Planning Policy Framework glossary defines major development for housing as development where 10 or more homes will be provided, or the site has an area of 0.5 hectares or more. For non-residential development it means additional floor space of 1,000 square metres or more, or a site of 1 hectare or more, or as otherwise provided in the 2015 Order. The 0.5 hectare test therefore catches smaller housing schemes in policy than in the statutory definition.
National planning guidance says planning obligations for affordable housing should only be sought for residential developments that are major developments. In designated rural areas, development plans may set affordable housing requirements for developments that are not major.

Medium development
The National Planning Policy Framework (August 2026) defines medium development as a sub-set of major development: housing development where 10 to 49 homes (inclusive) will be provided and the site has an area of up to 2.5 hectares. Framework policies that relate to major housing development also apply to medium development, and policies that apply only to medium development do not apply to larger schemes. The Framework says local validation requirements should distinguish between major, medium and other types of proposal.
Medium is a policy category. It is not part of the statutory definition of major development, and it does not change the decision periods above.

Medium development - homes

10 to 49 (inclusive)

Medium development - site

Up to 2.5 hectares
Planning for small sites (under 10 units)

Detailed guidance on minor development applications

Planning for medium sites (10-49 units)

How the major development rules apply to schemes of 10 to 49 homes, and the medium development policy category
Navigate Section 106 proportionately

S106 obligations often determine whether a small site is viable. Understanding the legal framework helps you negotiate proportionate contributions.

The three tests for S106

All S106 obligations must pass these legal tests. If they do not, you can challenge them.

A planning obligation under section 106 of the Town and Country Planning Act 1990 may only constitute a reason for granting planning permission if it meets all three tests in Regulation 122(2) of the Community Infrastructure Levy Regulations 2010.

Necessary

Necessary to make the development acceptable in planning terms

Directly related

Directly related to the development

Fair and reasonable

Fairly and reasonably related in scale and kind to the development

Exceptions and related rules

The tests do not apply to a sum payable to the local planning authority for the cost of monitoring delivery of planning obligations, provided the sum fairly and reasonably relates in scale and kind to the development and does not exceed the authority's estimate of its monitoring cost over the lifetime of the obligations (Regulation 122(2A)).

From 1 September 2019, the restriction on pooling more than five section 106 obligations towards the same infrastructure (Regulation 123) no longer applies in England.

S106 vs CIL

Understand when each applies and why you cannot be charged twice for the same infrastructure.

The Community Infrastructure Levy (CIL) and Section 106 planning obligations are different mechanisms for developer contributions. Both can apply to the same development.

CIL legal basis

Planning Act 2008, Part 11, and the Community Infrastructure Levy Regulations 2010

S106 legal basis

Town and Country Planning Act 1990, section 106

CIL nature

Charged at the rates in the council's charging schedule

S106 nature

Negotiated obligation that must meet the three tests in regulation 122

S106 pooling limit

Removed in England from 1 September 2019 (it had capped pooling at five obligations)

Infrastructure funding statement

Published each year by 31 December, setting out what CIL is intended to fund and reporting on CIL and S106

The three tests for S106

A planning obligation can be a reason for granting planning permission only if it is necessary to make the development acceptable in planning terms, directly related to the development, and fairly and reasonably related in scale and kind to the development.

What changed on 1 September 2019

The Community Infrastructure Levy (Amendment) (England) (No. 2) Regulations 2019 removed regulation 123 of the CIL Regulations in England. That ended two restrictions: the limit of five obligations that could fund the same infrastructure project or type, and the bar on a planning obligation funding infrastructure that the council had listed for CIL. Councils instead publish an annual infrastructure funding statement.

Not every council has a CIL charging schedule. Check with your local planning authority whether CIL applies in your area.

Navigate Section 106 agreements

How to understand, negotiate, and manage S106 obligations

Guv’s take

Know your local plan thresholds. Many areas only require affordable housing on sites of 10+ units. If you're building 9 on a site under 0.5 hectares, you may avoid significant S106 costs. Check the local plan carefully.
Comply with biodiversity net gain

BNG applies to small sites from April 2024, but with easements. Understanding these can significantly reduce your costs.

Small site BNG exemptions

Check whether you qualify for exemptions. Since 6 August 2026, planning applications for sites of 0.2 hectares or less are exempt from BNG unless onsite priority habitat is affected. The self-build exemption applies only to applications made before that date.

Mandatory biodiversity net gain (BNG) in England requires most developments to deliver a 10% increase in biodiversity value. Several exemptions exist for smaller developments. Where an exemption depends on priority habitat, that means a habitat in the list published under section 41 of the Natural Environment and Rural Communities Act 2006.

Area-based exemption

Sites of 0.2 hectares or less, for planning applications made on or after 6 August 2026, unless on-site priority habitat is impacted

How the 0.2 hectares is measured

Site area within the red line boundary, not the development footprint or the habitat affected

De minimis - area habitat

Less than 25 sq m of on-site habitat impacted

De minimis - linear habitat

Less than 5 metres of on-site linear habitat impacted

Temporary development

Whole development temporary and permission for 5 years or less, from 6 August 2026

Householder applications

Exempt

Self-build and custom build

Exempt only if applied for before 6 August 2026, or a variation of an exempt permission

BNG mandatory from

12 February 2024 (major development)

Small sites BNG mandatory from

2 April 2024

Priority habitat removes three of the exemptions

The 0.2 hectare, de minimis and temporary development exemptions do not apply if the development impacts on-site priority habitat, so BNG must be met in that case. The 0.2 hectare exemption also does not apply to a section 73 permission where the original application was made, or the original permission was granted, before 6 August 2026.

Brownfield residential development

On 28 October 2026 the Budget said the government would introduce an exemption from BNG for residential brownfield developments on sites of up to 1.5 hectares in England, and that the timeline for implementing it would be set out in the government's response to its consultation. It is an announcement, not yet an exemption in force.

BNG for small sites

Simplified BNG compliance for minor residential development

Guv’s take

Design-in, do not retrofit. On-site habitat creation is almost always cheaper than buying credits. Work with your landscape architect from the start to maximise biodiversity units through good specification.
Check nutrient neutrality

If your site is in one of the 27 affected catchments, you cannot get planning permission without demonstrating nutrient neutrality. There is no small site exemption.

What is nutrient neutrality?

Understand the requirement and why it's blocking development in affected areas.

Nutrient neutrality is a way of showing that a new development will not add to nutrient pollution in a protected site that is already in unfavourable condition because of it. Natural England has issued advice that, for these sites, projects and plans may only go ahead if the extra wastewater from the population growth they bring will not cause additional pollution. Local planning authorities can approve a project only if they are sufficiently certain it will have no negative effect on the site.

The advice rests on the habitats regulations. Excess nitrogen and phosphorus damage the protected sites, so you must show that the nutrient load from your development is offset.

Natural England advice, June 2023

31 habitats sites, across 27 catchments and 74 local planning authorities (wholly or in part)

Legal basis

Conservation of Habitats and Species Regulations 2017

Demonstrated by

A nutrient budget calculation using the Natural England calculator for the catchment

Default occupancy rate in the calculators

2.4 people per dwelling

What developments are affected?

Government guidance on the nutrient neutrality calculators describes the requirement as applying to new residential development. The calculators also cover other types of overnight accommodation, such as hotels. It matters only where your site is in a catchment covered by Natural England's advice.

How to check if you are affected

Contact your local planning authority or check Natural England's published catchment information. The authority can confirm whether your site falls within a catchment where the advice applies. Catchment boundaries are revised from time to time, for example the River Camel and River Eden calculators changed in March 2026.

Nature Restoration Fund and Environmental Delivery Plans

The Planning and Infrastructure Act 2025 provides for Environmental Delivery Plans (EDPs). Under an EDP, a developer pays a nature restoration levy to fund large-scale conservation measures instead of mitigating site by site. On 17 September 2026 Natural England published the first draft EDP, for the River Wensum, Bure Broads and Marshes, and Yare Broads and Marshes catchments in Norfolk, for consultation. Until an EDP that covers your development has been made and you have committed to paying the levy, you must still demonstrate nutrient neutrality for affected developments.

Nutrient neutrality compliance

How to achieve neutrality if your site is affected
Plan for condition discharge
Getting permission is only half the battle. Condition discharge can delay projects significantly if not managed proactively.
Types of planning conditions

Understand which conditions must be discharged before you can start work.
Planning conditions are attached to permissions to make development acceptable. The type of condition decides when it must be discharged.

Pre-commencement conditions

Discharge before any work starts on site

Prior to above slab level

Must be discharged before construction rises above ground floor level

Prior to specific works

Must be discharged before a named element of development begins

Prior to occupation

Must be discharged before the building is first used or occupied

Compliance conditions

Ongoing requirements - no formal discharge needed, but you must comply

Discharging conditions

Discharge fee (householder)

£89 per request (from 1 April 2026)

Discharge fee (other)

£309 per request (from 1 April 2026)

Annual increase

Each 1 April by the September CPI rise, capped at 10%, rounded to the nearest £1

Decision period

8 weeks (16 weeks for EIA development), or a longer period agreed in writing

Fee refund trigger

12 weeks with no written confirmation

Key points

You pay one fee for each request, and a request can cover several conditions.

The council cannot impose a pre-commencement condition without your written agreement to its terms, unless an exception in the Town and Country Planning (Pre-commencement Conditions) Regulations 2018 applies. This applies to permissions granted on or after 1 October 2018.

Starting work without discharging a pre-commencement condition is a breach of planning control. It is not itself a criminal offence, but the council can take enforcement action. If it serves a breach of condition notice and you do not comply, that is an offence.

Varying conditions (Section 73)

If a condition is unreasonable or circumstances change, you can apply under Section 73 to vary or remove it. This creates a new permission with amended conditions, not a modification of the original.
Discharge planning conditions

Step-by-step guide to discharging conditions efficiently

Take note

Pre-commencement means before ANY work. Starting without discharging pre-commencement conditions is a breach of planning control and the council can take enforcement action. The council has 8 weeks to decide a request (16 weeks for environmental impact assessment development), so build at least that into your programme.
Know your options if refused

Not every application succeeds. Understanding your options helps you respond effectively.

Appeal deadlines

Know your deadline - you cannot appeal after it passes.

If your planning application in England is refused, granted with conditions you object to, or not decided in time, you can appeal to the Planning Inspectorate. The Inspectorate must receive your appeal within the time limit, or it will not accept it. There is no fee for appealing.

Refusal or conditions

6 months from the decision notice

Householder refusal

12 weeks from the decision notice

Minor commercial refusal

12 weeks from the decision notice

Householder or minor commercial conditions

6 months from the decision notice

Advertisement consent

8 weeks

No decision in time

6 months from when the decision was due

Enforcement notice already served

28 days

Against an enforcement notice

Before the notice takes effect

Before you appeal, consider whether it would be quicker to address the reasons for refusal and submit a new application.

Respond to planning refusal

Your options when planning permission is refused

Make a planning appeal

How to appeal to the Planning Inspectorate

Main takeaways for SME housebuilders

Know your thresholds: The difference between minor (1-9) and major (10+) is significant - medium development (10-49) is a policy category within major development, so the major development rules still apply
Challenge disproportionate S106: Use the three tests to push back on excessive requirements
Design-in BNG: It's cheaper than buying credits
Check nutrient neutrality early: It can make or break site viability
Programme condition discharge: Build time for this before starting work
Build relationships: Good LPA relationships pay dividends across multiple applications

Official guidance

National Planning Policy Framework (NPPF) (opens in a new tab)

MHCLG · England

GOV.UK BNG guidance (opens in a new tab)

MHCLG · England

Biodiversity net gain: exempt developments (opens in a new tab)

DEFRA · England

GOV.UK planning conditions guidance (opens in a new tab)

MHCLG · England and Wales

SME housebuilder planning guide

What you will learn

Understand the threshold effects

Navigate Section 106 proportionately

Comply with biodiversity net gain

Check nutrient neutrality

Plan for condition discharge

Know your options if refused

Main takeaways for SME housebuilders

Official guidance

Next steps

Marketing compliance: PECR and UK GDPR

Set up auto-enrolment for your workplace pension

File your first Self Assessment tax return

Related journeys

Planning appeal process

Achieving nutrient neutrality

Small site planning fast track

Planning permission for new development