CIL Exemptions and Reliefs: When Developers Don't Pay the Community Infrastructure Levy

A Community Infrastructure Levy liability is not always payable in full. The CIL Regulations provide several reliefs and exemptions that can reduce the charge to zero — but almost every one depends on getting the paperwork in before work starts. Miss the procedure and you lose the relief, even if you clearly qualified.

This guide sets out the main reliefs and exemptions a developer or planning consultant should know, and the procedural traps that most often lose them.

This covers England only. This is general guidance, not legal advice. Always check your charging authority's requirements and take professional advice on eligibility for any relief.

The Golden Rule: Procedure Before Works

Before going through the individual reliefs, the single most important point: reliefs and exemptions must be claimed and granted before development commences. The general pattern is:

1. Assume liability for CIL.
2. Apply for the relief or exemption and have it granted by the charging authority.
3. Submit a Commencement Notice before any work begins on site.

If you start work before a Commencement Notice is submitted, the full chargeable amount can become payable immediately and the relief can be lost. This is the most common — and most avoidable — way developers lose a relief they were entitled to.

Charitable Relief

Under Regulations 43 to 48 of the CIL Regulations 2010, a charity that owns a material interest in the land can claim relief where the chargeable development will be used wholly, or mainly, for charitable purposes.

Key points:

• The relief applies to the part of the development used for charitable purposes.
• There are mandatory and discretionary elements — mandatory charitable relief applies where the statutory conditions are met; charging authorities can also offer discretionary charitable relief through their published policy.
• Like all reliefs, it must be claimed and granted before commencement, and it carries clawback conditions if the charitable use ceases.

Social Housing Relief

Regulations 49 to 54 provide relief for qualifying affordable housing. This is significant for residential developers, because affordable housing delivered as part of a scheme can attract relief from CIL on the affordable units.

Points to watch:

• The relief covers the qualifying affordable dwellings, not the open-market units.
• The definition of qualifying affordable housing for CIL purposes is specific — confirm the tenure types in your scheme qualify.
• A clawback applies if a relieved dwelling stops being used as qualifying affordable housing within the clawback period.

For developers, social housing relief interacts with the affordable housing secured through Section 106. The two are calculated separately — the S106 secures the affordable provision; the CIL relief removes the levy on those units. See our guide to Section 106 and affordable housing for the obligation side.

Self-Build Exemption (Whole House)

A self-build exemption is available under Regulations 54A to 54D where someone builds, or commissions, a home that they will occupy as their principal residence. This is aimed at individuals rather than commercial developers, but it matters to anyone advising on self-build or custom-build schemes.

The procedure is strict:

1. Assume liability for the CIL.
2. Apply for the exemption (the self-build exemption form) and have it granted.
3. Submit a Commencement Notice before starting work. If you start before the Commencement Notice is in, the full charge becomes payable.

The clawback is the trap that catches self-builders most often:

• The exemption is subject to a clawback period of three years from the date the dwelling is completed.
• If a disqualifying event occurs within those three years — most commonly selling or letting the dwelling, or it otherwise ceasing to be self-build housing — the exemption is lost and the levy becomes payable.
• The self-builder must notify the charging authority of a disqualifying event within 14 days of it occurring. Failure to notify can attract a surcharge of the lesser of 20% of the chargeable amount or £2,500.

Because the self-build exemption is aimed at owner-occupiers, a commercial developer cannot use it to avoid CIL on units built for sale. Advisers working on custom-build or plot-sale schemes need to be clear about who actually qualifies.

Residential Annexes and Extensions

Regulations 42A to 42C provide an exemption for a residential annex or extension to a person's own home. As with the whole-house self-build exemption, it must be claimed before commencement, and the annex exemption carries its own clawback conditions.

This is a homeowner-facing exemption rather than a developer one, but it comes up where a scheme includes annexes or where a consultant is advising a private client.

Minor Development and Zero-Rated Development

Two further routes to no charge — though strictly these are about whether CIL is chargeable at all, rather than reliefs:

• Development under 100 square metres that does not create a new dwelling is generally not liable in the first place.
• Development charged at a zero rate in the authority's charging schedule carries no liability. Charging schedules can set a zero rate for particular uses or zones where viability evidence supported it.

Neither of these needs a relief application, but the under-100-sqm route does not save a new dwelling — any new house or flat is potentially liable regardless of size.

The Recurring Trap: Reliefs Lost on Procedure

Across all of these, the pattern of lost reliefs is the same: the developer or self-builder qualified, but started work before the Commencement Notice was submitted, or missed a clawback notification. The relief was real; the procedure failed.

For anyone managing multiple schemes or plots, the discipline is to treat the relief paperwork as a hard gate before any work starts on each unit — and to diarise the three-year clawback period and any notification deadlines. A relief lost on a missed form is pure avoidable cost.

What This Means for Tracking

CIL reliefs come with dates that have to be hit and clawback periods that have to be watched — for years after completion. On a portfolio of schemes, that is a lot of deadlines spread across different authorities. Keeping the relief status, the commencement dates, and the clawback expiry for each unit in one record is what stops a relief being lost to a missed notification.

Summary

CIL reliefs and exemptions — charitable, social housing, self-build, annexes — can reduce a CIL charge to zero, but every one depends on claiming the relief and submitting a Commencement Notice before work starts. The self-build exemption carries a three-year clawback from completion, with disqualifying events (sale or letting) requiring notification within 14 days. Development under 100 square metres that creates no new dwelling, and zero-rated development, are not liable in the first place. The reliefs are real — but they are lost on procedure far more often than on eligibility.

Sources

• Community Infrastructure Levy Regulations 2010 (SI 2010/948)
• GOV.UK — Community Infrastructure Levy guidance