S106 Monitoring Guides

5 July 2026

The CIL liability notice sequence for developers — assumption of liability, commencement notice and demand notice — plus the surcharges for missing the timing.

28 June 2026

CIL exemptions and reliefs in England — charitable relief, social housing relief, self-build exemption and annexes — and the procedural traps that lose them.

21 June 2026

How the Community Infrastructure Levy works for developers in England — who is liable, how CIL is calculated, the notice sequence, and how it differs from Section 106.

14 June 2026

How Biodiversity Net Gain obligations are secured through Section 106 — the legal framework, the 30-year management period, and how BNG fits alongside other planning obligations.

7 June 2026

How Section 106 costs are calculated — the policy framework that drives obligation amounts, the structural inputs to financial contributions, and what developers should expect to budget for.

31 May 2026

How a Section 106 unilateral undertaking works — a developer-initiated planning obligation that doesn't need the council's signature, when to use one, and what to put in it.

24 May 2026

How to modify a signed Section 106 agreement — the contractual deed of variation route, the statutory Section 106A route after five years, and when each applies.

17 May 2026

How viability assessments shape Section 106 obligations — the NPPF/PPG framework, what developers submit, how councils respond, and what ends up in the agreement.

10 May 2026

What S106 contributions can and cannot fund — purpose restrictions, reallocation rules, and how to avoid spending money outside the agreement terms.

3 May 2026

S106 agreement durations, modification after 5 years, spend-by deadlines, and what planning officers need to track for long-running obligations.

26 April 2026

How to track section 106 contributions through the full financial lifecycle — indexation, receipts, allocation, spend, and clawback prevention.

19 April 2026

The full lifecycle of S106 developer contributions — from obligation drafting to spend verification — explained for planning monitoring officers.

12 April 2026

How to monitor section 106 affordable housing obligations — tenure mix, delivery triggers, commuted sums, and the data points planning teams need to record.

5 April 2026

A practical migration path from Excel-based S106 monitoring to structured tracking — what to keep, what to restructure, and how to avoid losing data in the transition.

29 March 2026

How section 106 and CIL work side by side — when each applies, how they interact, and what planning teams need to track for both.

22 March 2026

Real-world S106 agreement structures broken down — obligation types, trigger points, financial terms, and what to check before signing off.

15 March 2026

How S106 spend-by deadlines work, what happens when councils miss them, and how to track expiry dates across hundreds of live agreements.

8 March 2026

Evaluation criteria for S106 monitoring tools — what planning teams at smaller councils should prioritise when replacing spreadsheets.

1 March 2026

Step-by-step process for compiling your annual IFS efficiently — what Schedule 2 requires, where to find the data, and how to stop starting from scratch each December.

22 February 2026

How to track every section 106 agreement from trigger to spend — practical monitoring guidance for planning obligations officers at English councils.