Section 20 of the Landlord and Tenant Act 1985 is one of the most frequently mishandled areas of block management in the UK. It is also one of the most consequential. Get it wrong as a landlord or managing agent, and you may be unable to recover the full cost of major works from leaseholders — regardless of how necessary those works were, how much you spent, or how reasonable the costs were. Get it right as a leaseholder, and you have meaningful rights to scrutinise, challenge, and influence decisions that could cost you thousands of pounds.
This guide explains what Section 20 is, when it applies, how the process works stage by stage, what both landlords and leaseholders can and cannot do within it, the most common mistakes that expose landlords to financial loss, and what happens when it goes wrong. Whether you are an RMC director, RTM company director, freeholder, managing agent, or leaseholder trying to understand a consultation you have just received, this is the reference you need.
In This Guide
- What Section 20 Is — and Why It Exists
- When Section 20 Applies: The Cost Thresholds
- What Counts as Qualifying Works and QLTAs
- The Three-Stage Consultation Process
- Leaseholder Rights During Consultation
- Seven Common Mistakes That Invalidate the Process
- What Happens When Section 20 Goes Wrong
- Dispensations: When the Tribunal Can Waive the Process
- Frequently Asked Questions
What Section 20 Is — and Why It Exists
Section 20 of the Landlord and Tenant Act 1985, as amended by Section 151 of the Commonhold and Leasehold Reform Act 2002, requires landlords to consult with leaseholders before carrying out qualifying works or entering into qualifying long-term agreements where the cost to any individual leaseholder would exceed prescribed thresholds. The consultation process is set out in the Service Charges (Consultation Requirements) (England) Regulations 2003.
The purpose is straightforward: leaseholders pay service charges that fund building maintenance and management. They are, in effect, involuntary consumers of those services — they cannot choose a different supplier or opt out. Section 20 compensates for that lack of choice by giving them the right to be informed, to comment, and to nominate contractors before major decisions are made with their money.
If a landlord carries out qualifying works without complying with Section 20, their ability to recover costs from leaseholders through the service charge is capped at £250 per leaseholder — regardless of the actual cost. For a 20-unit block with a £200,000 roof replacement, that cap means the landlord can recover at most £5,000 total. The remaining £195,000 cannot be charged to the service charge without a dispensation from the First-tier Tribunal. This is not a theoretical risk. It happens regularly, and it is entirely avoidable.
When Section 20 Applies: The Cost Thresholds
Section 20 is triggered by two separate thresholds. Both apply to what any individual leaseholder would contribute — not the total project cost. A block of 20 flats with equal service charge proportions means the per-leaseholder cost is 5% of the total.
The thresholds have not been increased since the regulations came into force in 2003. With inflation, this means Section 20 now applies to relatively modest works — a communal decorating contract, a new lift maintenance agreement, or a modest roof repair can all trigger the requirement. If in doubt, assume Section 20 applies and consult your managing agent or solicitor before proceeding.
What Counts as Qualifying Works and QLTAs
Understanding which contracts and projects fall within Section 20 is the first practical step for any RMC or RTM director.
| Type | Examples | S20 Required? |
|---|---|---|
| Qualifying Works | Roof replacement, external redecorations, structural repairs, window replacement, lift replacement, communal area refurbishment, car park resurfacing | Yes — if >£250/leaseholder |
| Qualifying Long-Term Agreement (QLTA) | Cleaning contracts over 12 months, grounds maintenance contracts, lift maintenance and servicing agreements, insurance placement (where the landlord arranges), caretaking contracts, CCTV maintenance agreements | Yes — if >£100/leaseholder/year |
| Works under an existing QLTA | Major works commissioned under a qualifying long-term agreement that was itself properly consulted on | Reduced process — single stage only |
| Emergency works | Works genuinely required to prevent immediate risk to health, safety, or the structure of the building | May apply for dispensation |
| Works below threshold | Routine repairs, minor maintenance, works costing less than £250 per leaseholder | Not required |
| Public authority landlords | Certain local authority landlords have modified rules | Different regime |
Many managing agents consult properly on individual major works projects but fail to recognise that their standard cleaning, maintenance, and grounds contracts are qualifying long-term agreements requiring their own separate Section 20 consultation. If a three-year cleaning contract costs leaseholders more than £100 per year each, failing to consult on that agreement means the landlord cannot recover costs above £100 per leaseholder per year for the duration of the contract — even if the charges are entirely reasonable.
The Three-Stage Consultation Process
The statutory process for qualifying works not carried out under an existing QLTA involves two mandatory stages and one conditional stage. The process for a new QLTA follows a parallel structure. Below is the qualifying works process — the most commonly encountered.
The landlord must serve a written Notice of Intention on every leaseholder and, where one exists, the recognised tenants' association (RTA). The notice must describe the proposed works in general terms, state why the works are considered necessary, invite observations in writing within 30 days, and invite nominations of contractors the landlord should invite to tender.
The landlord must have regard to any observations received during the 30-day period. All nominated contractors who are competent and willing to tender must be invited to submit a tender.
- Notice must be served on every leaseholder — not just residents
- Service can be by hand, post, or (if agreed) electronically
- Proof of service must be retained for every leaseholder
- The 30-day period runs from the date of the last service, not the first
After obtaining estimates — at least two, including one from any nominated contractor and at least one from an unconnected party — the landlord must serve a Notice of Proposals on every leaseholder and the RTA. The notice must include a copy or summary of at least two estimates, the name and address of each contractor, and details of where the full estimates can be inspected.
Leaseholders then have a further 30 days to submit observations in writing. The landlord must have regard to those observations before awarding the contract.
- At least one estimate must be from a contractor who is wholly unconnected to the landlord or managing agent
- Leaseholders have a right to inspect all estimates — make them available at a reasonable location and time
- If a recognised tenants' association requests a copy of estimates, the landlord must provide one
A Notice of Reasons is required if the landlord awards the contract to neither the nominated contractor (if any) nor the contractor who submitted the lowest estimate. The notice must be served within 21 days of awarding the contract and must explain why the landlord chose a different contractor.
This stage exists to prevent landlords from simply ignoring leaseholder nominations or cost considerations without accountability. Common legitimate reasons include concerns about contractor quality, capacity, or track record — but these must be articulated, not assumed.
The two mandatory observation periods alone account for a minimum of 60 days. In practice, accounting for contractor response times, estimate preparation, and postal service delays, a compliant Section 20 process for qualifying works typically runs 90 to 120 days from initiation to contract award. This needs to be built into project planning — starting the process only when works are urgently needed is one of the most common mistakes.
The Process for a New Qualifying Long-Term Agreement
The consultation process for entering into a new QLTA follows the same two-stage structure with an important difference at Stage 2: the landlord must obtain at least two proposals rather than estimates, and where one of those proposals is from a nominated contractor, it must be included. The 30-day observation periods apply in the same way, and a Notice of Reasons is required in the same circumstances if a non-lowest or non-nominated provider is selected.
The Reduced Process: Works Under an Existing QLTA
Where qualifying works are to be carried out under a QLTA that was itself properly consulted on, only a single-stage consultation is required. The landlord must serve a notice describing the proposed works, the estimated cost, and inviting observations within 30 days. No estimates need to be obtained under the reduced process — the QLTA contractor is already approved. This is one of the key practical advantages of having a properly consulted QLTA in place for planned maintenance programmes.
Leaseholder Rights During Consultation
Rights during Stage 1
- Submit written observations on the proposed works within 30 days
- Nominate contractors to be invited to tender
- Form or rely on a recognised tenants' association to coordinate responses
- Request confirmation of the date by which nominations must be submitted
Rights during Stage 2
- Inspect all estimates received — not just the selected one
- Submit written observations on the estimates within 30 days
- Request that the RTA be provided copies of estimates
- Ask the landlord to explain why a nominated contractor was not selected
Rights after the process
- Apply to the First-tier Tribunal for a determination that service charges are unreasonable
- Challenge whether the consultation process was properly followed
- Request a summary of relevant costs and inspect supporting documents under Section 22 of the LTA 1985
- Apply to the FTT if the landlord fails to provide a summary within one month
Limits on leaseholder rights
- Cannot veto works — consultation is not a vote
- Cannot require the landlord to accept the lowest tender
- Cannot prevent the landlord from awarding to a non-nominated contractor if reasons are given
- Must act promptly — delay in challenging can affect remedy options
A recognised tenants' association (RTA) — a formally constituted association of leaseholders recognised by the landlord or the FTT — has enhanced rights under Section 20. The landlord must notify the RTA at each stage, must allow it to inspect estimates, and must give reasons in writing if it does not follow the RTA's recommendations. Forming an RTA is not a complex process and significantly strengthens leaseholder influence over major works decisions.
Seven Common Mistakes That Invalidate the Process
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Starting works before the consultation is complete
The most financially damaging mistake. Some landlords serve notices but appoint a contractor and begin work before the 30-day Stage 2 observation period expires. The consultation is invalidated from that point. The £250 cap applies to all costs incurred after the breach — not just from the moment works begin.
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Failing to serve notices on all leaseholders
Section 20 requires service on every leaseholder individually. Posting a notice in the communal hallway, sending one letter to "all residents", or notifying only the leaseholders the managing agent has contact details for is not sufficient. The landlord must have a current leaseholder register and must be able to prove service on each one.
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Failing to obtain an estimate from an unconnected party
At Stage 2, at least one estimate must be from a contractor wholly unconnected to the landlord or managing agent. Obtaining three estimates from contractors the agent routinely uses — even if the estimates are genuine — does not satisfy this requirement. The independence of at least one estimate is a specific statutory condition, not a best-practice guideline.
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Not inviting a nominated contractor
If leaseholders nominate a competent, willing contractor during Stage 1, the landlord must invite that contractor to tender. Ignoring the nomination without good reason does not necessarily invalidate the entire process but gives leaseholders grounds to challenge the award decision and may require a Notice of Reasons.
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Treating QLTAs as ordinary contracts
As described above, many agents manage buildings for years with cleaning, grounds maintenance, and lift service contracts that have never been subject to Section 20 consultation. The absence of challenge from leaseholders does not mean the contracts are compliant — it often means leaseholders do not yet know their rights. The liability accumulates quietly.
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Inadequate description of proposed works in Stage 1
The Notice of Intention must describe the works in sufficient detail for leaseholders to understand what is proposed and to nominate relevant contractors. A notice that says only "roof works" without describing the nature and scope of the repairs is likely to be inadequate. If leaseholders successfully argue the notice was insufficient, the consultation may need to be restarted.
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Failing to retain proof of service
Completing the process correctly but being unable to prove it is functionally the same as not doing it. The landlord bears the burden of demonstrating compliance. Retain dated copies of every notice, postal receipts or delivery confirmations, and a leaseholder-by-leaseholder service log for every consultation.
What Happens When Section 20 Goes Wrong
- Service charge recovery capped at £250 per leaseholder for the works
- Must apply to FTT for dispensation — not guaranteed, not free, not fast
- Risk that FTT conditions dispensation on making leaseholders whole for any prejudice caused
- Managing agent may face professional indemnity claims from landlord client
- Subsequent leaseholder challenge to all service charges — damages trust and creates litigation risk
- Reserve fund may be depleted by unrecoverable costs, leaving the building underfunded
- Right to apply to FTT for a reduction in service charges to the £250 cap
- Right to challenge reasonableness of charges regardless of Section 20 compliance
- Right to recover costs if FTT application is successful
- Potential ground to withhold service charges pending resolution — with legal advice
- Stronger negotiating position in any dispute about the works or costs
It is worth being direct about the practical reality. The FTT does grant dispensations — but not automatically, not always, and not without scrutiny. In Daejan Investments Ltd v Benson [2013] UKSC 14, the Supreme Court confirmed that dispensation can be granted even where the landlord was at fault, but the FTT must be satisfied that leaseholders have suffered no prejudice — or that any prejudice can be compensated. The Court also emphasised that the purpose of Section 20 is to protect leaseholder rights, not to penalise landlords for technical errors. Post-Daejan, dispensations are more readily available than they once were, but the process takes time, costs money in legal and FTT fees, and has no guaranteed outcome.
Dispensations: When the Tribunal Can Waive the Process
Section 20ZA of the Landlord and Tenant Act 1985 allows the First-tier Tribunal to dispense with all or any of the consultation requirements. A dispensation application can be made before works begin (prospective) or after they have been carried out (retrospective).
Where genuinely urgent works are required — for example, a roof failure causing active water ingress that threatens structural damage or the health of occupants — a landlord can apply to the FTT for a prospective dispensation allowing works to proceed immediately. The Tribunal will want to see evidence of the urgency and will assess any prejudice to leaseholders. A well-prepared application with supporting evidence from a structural engineer or contractor typically takes two to four weeks to resolve. This is the correct route for genuine emergencies — not simply proceeding with works and hoping to obtain retrospective dispensation later.
Retrospective dispensation — sought after works have already been carried out without consultation — is harder to obtain. The FTT will examine whether leaseholders were prejudiced by the lack of consultation: whether they might have nominated a cheaper contractor, whether the chosen contractor was overpriced, or whether the works were even necessary. If prejudice is found, the dispensation may be conditional on a reduction in the recoverable amount.
Section 20 Is Our Bread and Butter
Managing Section 20 consultations correctly — on time, with the right notices, to every leaseholder — is one of the most operationally demanding aspects of block management. Most problems we inherit when taking over a building involve either consultations that were never run or processes that were run incorrectly and have left the building with unrecoverable costs or active FTT proceedings.
- Full Section 20 project management. We run the entire consultation process: drafting notices, serving every leaseholder, managing the tender process, handling observations, and retaining the complete evidence file.
- QLTA audit on takeover. When we take over a building, we audit every existing contract for QLTA status and identify any that require consultation to make them enforceable.
- Contractor network. We maintain a panel of qualified, independent contractors across all building maintenance trades — ensuring Stage 2 estimates meet the unconnected party requirement.
- Leaseholder communication. We handle all leaseholder correspondence during the consultation, including responses to observations and Stage 3 Notices of Reasons where required.
- FTT support. If a consultation is challenged at the FTT, we provide the documentation, evidence, and agent attendance required to defend the process.
- Transparent accounting. All Section 20 costs are accounted for with full supporting documentation in the annual service charge accounts — no surprises for leaseholders at year end.
Frequently Asked Questions
The Process Protects Everyone — When It's Done Correctly
Section 20 is not a bureaucratic obstacle. When managed competently, it gives leaseholders meaningful involvement in decisions that directly affect their costs, and it gives landlords and RMC/RTM directors full recovery of legitimate expenditure. The problems — the FTT applications, the unrecoverable costs, the breakdown of trust between landlord and leaseholders — almost always stem from agents who do not understand the process or do not have the systems to run it properly.
If your building has major works planned, if you have entered into maintenance contracts that may be QLTAs, or if you have inherited a building where previous consultations may be defective, the time to address it is before works proceed — not after.