---
title: NEC4 Webinar No.9 - Disallowed costs (ECC options C/D/E)
date: 2026-05-06T17:14:23Z
modified: 2026-05-06T17:14:25Z
permalink: "https://gmhplanning.co.uk/nec4-ecc-and-disallowed-costs/"
type: post
status: publish
excerpt: ""
wpid: 8632
categories:
  - NEC4 Webinars
featured_image: "https://gmhplanning.co.uk/wp-content/uploads/2024/02/GMH-CECA-NEC-Bulletin-Member-Briefing.jpg"
featured_image_alt: Cover image for CECA NEC4 Bulletin CECA Member Briefings by GMH Planning Ltd
author: Glenn Hide
timestamp: 2026-05-06T17:14:25Z
tags:
  - NEC4 Webinars
---

The ninth webinar in this series is about understanding Disallowed Cost provisions under the cost reimbursable ECC options (C,D,E&F). Glenn Hide ([GMH Planning](https://gmhplanning.co.uk/wp-content/uploads/wp-mfa-exports/page/gmh-planning.md)), Ben Walker ([Gather](https://www.gatherinsights.com/)) and David Allen ([CECA](https://www.ceca.co.uk/)) review all aspects of the Disallowed Cost definition and how it should be understood/applied.

This webinar covers in detail:

- what is Disallowed Cost?
- why do we need Disallowed Cost?
- payment assessments
- accounts and records, Subcontractors
- procedures, defects and wastage

## Topics

**Categories:** [NEC4 Webinars](https://gmhplanning.co.uk/wp-content/uploads/wp-mfa-exports/taxonomy/category/nec4-webinar.md)