How do I calculate the inclusion percentage?

Divide the number of required units or floor area by the total proposed units or area, then multiply by 100. Use the council-agreed unit counts or GIA figures when reporting.

Where do I find Sheffield policy targets?

Policy targets are in the Sheffield Local Plan and any relevant Supplementary Planning Documents; see the council planning policy pages for the current text.

What if the Local Plan does not state a numeric percentage?

If the Local Plan does not specify a numeric target, the council negotiates provision on a site-by-site basis and decisions rely on viability evidence; the council contact should be consulted.

Sheffield Planning: Inclusion Percentages for Developments

Land Use and Zoning England 4 Minutes Read · published February 12, 2026

Introduction

This guide explains how to calculate inclusion percentages for new residential developments in Sheffield, England, under local planning policy and planning obligations. It summarises the calculation method for affordable or required provision, identifies the responsible council departments, explains enforcement and appeals, and lists practical action steps for developers, landowners and agents. Where the official page does not specify a numeric percentage or fee, this guide states that explicitly and cites the relevant Sheffield City Council pages current as of February 2026.

How inclusion percentages are calculated

Most calculations are straightforward: inclusion percentage equals the number of units or floor area required to meet the policy divided by the total proposed units or gross internal floor area, multiplied by 100. Use agreed net residential units or gross internal area per the council's application advice when reporting. Where the Local Plan or Supplementary Planning Documents set targets or thresholds, apply those figures first and then adjust for viability or site-specific agreements.

Example calculation: 8 affordable units / 50 total units = 16% inclusion.

Relevant policy and official pages

Primary municipal sources govern inclusion percentages and planning obligations. Consult the Sheffield Local Plan and the council planning enforcement/contact pages for official policy text and contacts. The Local Plan contains policies on affordable housing and planning obligations; enforcement pages explain compliance and reporting routes. For specific policy text or numerical targets not visible on the pages cited below, the official page is referenced and the article notes if a number is not specified.^[1]^[2]

Check the Local Plan policy text before preparing any Section 106 offer.

Penalties & Enforcement

Enforcement of planning obligations, including delivery of agreed affordable units or payments in lieu, is handled by Sheffield City Council planning enforcement and legal teams. Remedies include enforcement notices, injunctions, breach of condition notices, and legal action to enforce Section 106 agreements; financial penalties or court-ordered remedies may apply where breaches occur.

Fine amounts: not specified on the cited page; specific fines or financial penalties are set by statute or by the court in enforcement proceedings and are not listed on the council policy page cited below.
Escalation: first, negotiation and compliance notices; repeat or continuing breaches may lead to prosecution or injunctions; exact escalation ranges are not specified on the cited page.
Non-monetary sanctions: enforcement notices, requirements to complete works, injunctions, and referral to the courts.
Enforcer and contact: Sheffield City Council Planning Enforcement and Legal Services handle investigations and enforcement—use the council planning enforcement contact page to report breaches.^[2]
Appeal/review routes and time limits: appeals against planning enforcement notices go to the Planning Inspectorate; time limits for appeals are set on the enforcement notice itself or statute and are not specified on the cited council page.
Defences/discretion: defences can include demonstrating a reasonable excuse, compliance steps already taken, or approval via a planning permission or variation such as a Section 73 application or amended Section 106 agreement.

If you believe a developer is failing to deliver agreed inclusion, report it promptly to the planning enforcement team.

Common violations

Failure to deliver the agreed number of affordable units.
Non-submission of required monitoring reports or post-completion certificates.
Failure to pay agreed financial contributions or delayed payments.

Applications & Forms

The council publishes application guidance for planning permissions, Section 106 agreements and viability statements on its planning pages. Specific standard forms for Section 106 deeds are legal documents prepared by the council and its solicitors during the planning agreement process; a generic downloadable "planning application" form is available on the council website, but a standard national form number for Section 106 is not published on the cited page.

Submit viability evidence and draft agreements early to avoid delays in planning approval.

Action steps for developers and agents

Step 1: Review the Sheffield Local Plan policy provisions relevant to affordable housing and planning obligations.
Step 2: Calculate inclusion percentage: (units required / total units) x 100 or (required floor area / total area) x 100 and document assumptions.
Step 3: Prepare viability appraisal and negotiation materials if delivering the policy target is impractical.
Step 4: Agree Section 106 heads of terms with the council and allow time for legal agreement drafting.
Step 5: Ensure monitoring, delivery milestones and trigger points are recorded and complied with post-permission.

FAQ

How do I calculate the inclusion percentage?: Divide the number of required units or floor area by the total proposed units or area, then multiply by 100. Use the council-agreed unit counts or GIA figures when reporting.
Where do I find Sheffield policy targets?: Policy targets are in the Sheffield Local Plan and any relevant Supplementary Planning Documents; see the council planning policy pages for the current text.^[1]
What if the Local Plan does not state a numeric percentage?: If the Local Plan does not specify a numeric target, the council negotiates provision on a site-by-site basis and decisions rely on viability evidence; if a figure is not published on the cited page, this guide notes "not specified on the cited page" and refers you to the council contact.

How-To

Gather the proposed scheme schedule of accommodation and total unit or area totals.
Identify policy requirements or negotiated targets from the Sheffield Local Plan or SPD.
Compute inclusion percentage: (required units or area / total units or area) x 100.
Prepare viability evidence if delivery at the target rate is infeasible.
Submit the calculation and supporting documents with the planning application and agree Section 106 heads of terms.

Key Takeaways

Inclusion percentage is a simple ratio but must use council-agreed unit or area figures.
Local Plan policies and Section 106 negotiations determine final delivery; numeric targets may be site-specific.
Contact Sheffield planning officers early to confirm requirements and avoid delays.