For investors acquiring leasehold residential property, section 20 major works notices represent one of the most significant sources of unexpected post-acquisition cost. A section 20 notice is the mechanism by which a landlord consults leaseholders before carrying out works or entering into a long-term maintenance contract that will cost any individual leaseholder more than £250. Where such a notice has been served — or where major works are anticipated but the notice has not yet been issued — the financial exposure for a new buyer can be substantial.

This guide explains how section 20 works, what investors should look for in the legal pack, and how to assess the risk before acquisition.

What Is Section 20?

Section 20 of the Landlord and Tenant Act 1985 (as amended by the Commonhold and Leasehold Reform Act 2002) requires landlords to consult leaseholders before carrying out ‘qualifying works’ — works to a building or its common parts that will cost any individual leaseholder more than £250. The consultation process involves serving formal notices on leaseholders and allowing them to propose contractors and comment on the proposals.

The purpose of section 20 is to protect leaseholders from arbitrary or disproportionate works charges. Where a landlord fails to comply with the section 20 consultation process, the amount they can recover from each leaseholder for the works is limited to £250, regardless of the actual cost of the works. Proper compliance with section 20 removes this cap and allows the landlord to recover the full cost (subject to the works being reasonably necessary and the costs being reasonable).

What a Section 20 Notice Means for a Buyer

A section 20 notice in the legal pack, or evidence of anticipated major works, signals that the property’s service charge is likely to increase significantly in the near term. The nature and extent of this exposure depends on:

  • What works are proposed — roof replacement, lift modernisation, external decoration, cladding remediation and structural repairs are among the most expensive categories.
  • The estimated cost and the buyer’s share — the individual leaseholder’s contribution is typically calculated as a proportion of their floor area or as a fixed percentage set out in the lease.
  • Whether the consultation is at an early stage (notice of intention only) or has progressed to a notice of estimates (at which point the costs are more defined).
  • Whether a sinking fund exists and whether it is adequate to meet the anticipated cost — a well-funded reserve substantially reduces the exposure from a section 20 notice.

For investors, the key calculation is the likely out-of-pocket cost above the sinking fund balance. This amount is a direct acquisition cost and should be reflected in the bid price.

When Section 20 Notices Are Not in the Pack

The absence of a section 20 notice from the legal pack does not mean that major works are not anticipated. Legal packs — particularly auction packs — are not always complete, and managing agents are not always proactive in providing information about forthcoming works before a property goes to market.

Investors should consider requesting a management information pack from the managing agent before exchange. This should include the service charge accounts, the buildings insurance details, any section 20 consultation notices and information about any planned works. The cost of obtaining a management pack is modest and can identify significant financial exposure that would otherwise only become apparent post-completion.

Where a management pack cannot be obtained before the auction or exchange deadline, the investor may need to price the risk of undisclosed major works into the bid, or accept search indemnity insurance that may or may not cover service charge exposure depending on the policy terms.

Liability for Pre-Exchange Major Works

A question that arises in many leasehold acquisitions is whether a new buyer is liable for service charges or major works costs that relate to the period before they became the leaseholder. The answer depends on the lease terms and the nature of the liability.

As a general principle, service charges become due when they are demanded in accordance with the lease. A buyer who completes after the demand date may not be directly liable for a charge that was demanded before completion — but the seller may not have paid it either, leaving the managing agent with a debt that they will seek to recover from whoever is the current leaseholder. The apportionment of service charge liability between seller and buyer is typically addressed in the special conditions of sale or through an undertaking by the seller’s solicitors.

For a section 20 notice that has been served but where the works have not yet been completed, the full cost will be recoverable from whoever is the leaseholder at the time the final demand is issued — which may be the buyer, not the seller. This makes it important to understand the section 20 position, the works timeline and the demand structure before exchange.

Practical Steps for Investors

  • Review the service charge accounts for at least three years and look for any unusually high years that might indicate past major works.
  • Check the legal pack for any section 20 notices and assess the stage they have reached.
  • Request a management pack and ask specifically about any planned or anticipated works.
  • Confirm the sinking fund balance and whether it is adequate to meet likely costs.
  • Price any identified section 20 exposure into the bid or negotiate a price reduction to reflect it.

Bidq reviews service charge history and section 20 notices and translates them into practical cost exposure — before you commit. Explore Bidq’s pre-acquisition due diligence report.