Section 20 Major Works Consultancy London

Specification, procurement and contract administration for major works to residential blocks, estates and managed buildings across London.

Works Specification Procurement & Tendering Contract Administration
RICS Regulated Firm No. 923064Professional Indemnity InsuredCompany No. 17085122
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Overview

Major works advice that helps block owners, managing agents and freeholders deliver works with stronger control

We provide major works consultancy for residential blocks across London, supporting freeholders, managing agents, housing associations and resident management companies through specification, procurement and contract administration for remedial, refurbishment and capital works programmes.

Major works to residential blocks are often commercially significant, technically demanding and operationally sensitive. Our advisory approach is designed to help clients define scope clearly, procure contractors on a fair and competitive basis, and maintain stronger control over programme, cost and quality through delivery.

Our role is independent. We provide independent surveying, specification, procurement and contract administration advice. We help clients define the works, procure fairly and manage delivery without contractor-led pressure, acting under the agreed client appointment. Leaseholders may fund the works through the service charge; that does not make HCS their appointed adviser.

Most major works to London blocks also trigger the statutory consultation regime under section 20 of the Landlord and Tenant Act 1985. Where any single leaseholder would be charged more than £250 for qualifying works, or more than £100 a year under a qualifying long-term agreement, the landlord must consult before the cost can be fully recovered through the service charge — otherwise recovery is capped at those figures unless the First-tier Tribunal grants dispensation.

In practice that means a clear specification, a genuine tender exercise, and properly served notices of intention and estimates, all documented. London blocks add their own complications: mixed freehold and RMC ownership, high leaseholder scrutiny, occupied common parts, and works such as external wall or roof repair that overlap with fire safety and access constraints.

We help clients scope the works, run a defensible procurement, and align the technical programme with the section 20 timetable, so consultation supports cost recovery rather than delaying it.

Before You Instruct

What to send, and what you receive

Outline the building and the works and we will set out how we can support delivery and a fee before you instruct.

What to send before we quote

  • The building address and postcode
  • The proposed works
  • Any existing surveys or specifications
  • Leaseholder or funding constraints
  • Your target programme

What you receive

  • A clear scope of our role and deliverables
  • Documents suited to the stage (for example specification, tender or contract administration outputs)
  • Independent oversight and reporting through delivery

Where specialist designers or engineers are needed, we set out the gaps and coordinate the right input. Ask what the report would include.

Section 20 thresholds and responsibilities

For England, qualifying works trigger consultation when any one leaseholder’s relevant contribution is more than £250. For a qualifying long-term agreement, the test is more than £100 for any one leaseholder in an accounting period. Such an agreement has a term of more than 12 months, subject to the statutory definition and exclusions. Check the highest actual contribution under the leases, including VAT where payable, rather than relying on the average for the block.

Thresholds effective from 31 October 2003; statutory sources checked 1 October 2026. This source check is separate from the page’s human review date.

Sources: qualifying works amount, agreement amount and accounting period, agreement definition and commencement.

Reform watch: Government has consulted on raising the thresholds and a draft Leasehold and Commonhold Reform Bill was published in January 2026. Government consultation; draft Bill. Check the current law before relying on a proposed change.

Section 20 consultation process, notices and technical support

HCS does not prepare or serve statutory Section 20 notices. HCS provides the specification, tender information and consultation support the landlord or managing agent needs. The notices are issued by the landlord or agent, with their solicitor where required. HCS does not give legal advice.

Start by identifying the leases, the party responsible for consultation and the correct statutory procedure. The ordinary qualifying-works route below is the route without a public notice requirement; works under an existing qualifying long-term agreement and other procurement routes need their own checks.

Notice of intention and observations

The landlord or agent describes the proposed works and why they are needed, invites observations and contractor nominations, and makes the description available as required. The ordinary route provides a 30-day observation period. HCS supplies the technical description and helps the client address questions about condition, scope, access and alternatives.

Statement of estimates and leaseholder nominations

The landlord must obtain estimates and supply a statement showing at least two of them; at least one estimate must come from a person wholly unconnected with the landlord. The nomination rules require attempts to obtain estimates from nominated contractors, with the selection duties depending on who nominated them. A nomination is not an automatic appointment. A tender pool should allow for those nominations and record connections, scope exclusions and any contractor who does not return a price.

HCS prepares a common specification and pricing information, compares returned estimates and provides technical responses to observations. The landlord or agent provides the statement, the required summary and response to earlier observations, access to all estimates, and a further 30-day opportunity to comment. A tender report should explain differences in proposed work, qualifications, access, programme and price rather than compare totals alone.

Selection, reasons and the building contract

The landlord must have regard to observations on the estimates. Under this route, if the chosen contractor is neither a nominee nor the lowest estimate, written reasons and the required response to observations are due within 21 days of entering the contract. This is a conditional duty, not a universal third observation period. HCS can explain the technical recommendation; the landlord or agent issues the statutory communication. Agree the appointed building-contract role before works start and record later changes to scope and cost.

Read the ordinary qualifying-works procedure in Schedule 4, Part 2. The client’s solicitor should advise on notice service, the applicable procurement route and disputed statutory compliance.

Who This Service Is For

Clients responsible for delivering major works to residential buildings

Managing Agents Freeholders Resident Management Companies Housing Associations Block Owners Right to Manage Companies Asset Managers

This service is typically instructed where a residential block or estate requires major works and the client needs independent advisory support to define scope, manage procurement and oversee delivery, whether for a single block or a multi-building programme.

When To Instruct Us

Typical trigger points for major works

  • Where a condition survey has identified works requiring a structured delivery approach.
  • Before tendering where scope needs to be defined clearly for competitive pricing.
  • Where Section 20 consultation requires a defensible specification and procurement process.
  • Where previous major works have experienced cost, programme or quality issues.
  • Where a managing agent or freeholder needs independent advisory support through delivery.
  • Where remedial works to building fabric, roofs, windows or common parts are needed.
  • Where fire safety works need to be coordinated alongside wider building improvements.
  • Where residents or leaseholders need confidence in the scope, cost and management of works.
What We Cover

Section 20 works: support from scope through completion

Scope Definition and Specification

Defining the scope of works based on condition assessment, preparing specifications and documentation suitable for competitive tendering and contractor appointment.

Procurement and Tendering

Managing the procurement process including tender documentation, contractor selection, tender evaluation, recommendation and appointment on a fair and transparent basis.

Contract Administration

Acting as contract administrator through delivery, managing valuations, variations, instructions, programme and contractual obligations on behalf of the client.

Delivery Oversight and Completion

Monitoring progress on site, managing quality, addressing issues as they arise, overseeing practical completion and managing the defects liability period.

Common Issues

Common issues in major works to residential blocks

  • Unclear scope leading to cost overruns and contractor disputes.
  • Procurement that does not achieve competitive or comparable pricing.
  • Section 20 consultation requirements adding complexity to the process.
  • Works in occupied buildings where resident disruption must be managed.
  • Contractor performance issues during delivery.
  • Variations and additional costs emerging during the works.
  • Defects and snagging at practical completion.
  • Leaseholder concerns about cost, scope and management.

Why independent major works consultancy matters

Independent advisory support helps the client maintain control over a process that is often complex, costly and scrutinised by multiple parties. Clear specification, competitive procurement and independent contract administration reduce risk and strengthen the client's position throughout.

Typical Process

How a major works instruction typically works

01

Condition Review and Scope

We assess the building condition to establish what works are needed and develop a clear scope and specification for competitive tendering.

02

Tender Preparation

We prepare tender documentation, define the procurement route and identify a suitable contractor pool.

03

Tender Evaluation

We evaluate received tenders against price, quality, programme and methodology, and provide a clear recommendation to the client.

04

Contract Administration

We administer the building contract through delivery, managing valuations, variations, instructions and programme.

05

Completion and Defects

We oversee practical completion, manage snagging and defects, and support the client through the defects liability period to final account.

Planning the scope of your major works instruction

Roof and external fabric

For proposed roof renewal, window work or external repairs, send the condition information and explain how access and occupation affect the scope. The Section 20 contribution checker helps identify questions about the relevant threshold and lease apportionment.

Phased estate works

For a programme involving several buildings, identify the ownership, leases and proposed phases. Set out common access needs, resident communication and decisions that could affect more than one block. Phasing is not a reason to assume consultation can be avoided.

Safety work and wider repairs

Provide the existing safety reports and distinguish urgent actions from longer-term repairs. Technical coordination must work alongside the responsible parties’ statutory duties and legal advice on funding and consultation.

After a condition survey

Use the survey’s findings to identify what needs further investigation, what can be specified now and which decisions are needed before seeking comparable tenders.

Deliverables

What the client receives

  • Scope of works and specification.
  • Tender documentation and procurement management.
  • Tender evaluation and recommendation report.
  • Contract administration through delivery.
  • Interim valuations and payment recommendations.
  • Variation management and cost control.
  • Practical completion and defects management.
  • Optional Section 20 support documentation.
How This Advice Is Used

How clients use this advice

  • Major works planning and budget approval.
  • Section 20 consultation and leaseholder communication.
  • Competitive contractor procurement.
  • Cost control and commercial management during works.
  • Resident and stakeholder reporting.
  • Defects management and close-out.
  • Long-term building planned maintenance.

Section 20ZA dispensation: technical evidence and legal advice

Under section 20ZA, the First-tier Tribunal can dispense with consultation requirements where it considers that reasonable. In Daejan Investments Ltd v Benson [2013] UKSC 14, the Supreme Court focused on relevant prejudice to leaseholders from the consultation failure, and dispensation can carry conditions. Urgency does not itself grant dispensation. HCS can supply condition, scope, cost and chronology evidence; the application and legal arguments remain with the client and their legal adviser. LEASE explains the Daejan approach and possible conditions.

Qualifying long-term agreements

An agreement entered into by or on behalf of the landlord for more than 12 months may fall within the QLTA rules, subject to statutory exclusions. Check maintenance, lift-servicing, cleaning and insurance-related arrangements by their actual terms, including duration and notice provisions. The name of the service does not decide the legal category; an annually renewed insurance policy is not automatically a long-term agreement.

The relevant contribution test is £100 per leaseholder in an accounting period. Check the period and each lease’s apportionment before entering the agreement. Separate requirements may apply to qualifying works under an existing QLTA. HCS can help define technical service requirements and compare proposals; the landlord or agent arranges consultation with legal advice where required.

Reserve funds and planned maintenance

A reserve fund is a funding arrangement, not a substitute for consultation. Check whether the leases allow contributions, what the fund may pay for and how costs are apportioned. A condition-led programme helps directors and managing agents distinguish immediate repairs from work that can be planned alongside later access or cyclical maintenance.

Connect the programme to planned maintenance surveys, the available records and the proposed consultation timetable. Keep insurance reinstatement cost assessments separate: the insurance rebuild figure is not the budget for maintaining the occupied block. No assumed reserve contribution or project budget is used here.

Section 20 expenditure, works cost and consultancy fees

Major works consultancy is scoped to the building and programme. Agree the services included, the deliverables at each stage and the basis for additional work before comparing fees. These are fee structures to discuss in a proposal, not published HCS rates or a promise that every basis suits every instruction.

Percentage of the contract sum

Define the contract sum used for the calculation and the effect of variations, omissions and extensions of time. Check whether specification, tender analysis, site inspections, valuations, completion and defects-period services are included. A percentage alone does not describe the appointment or its exclusions.

Staged fixed fees

Identify the separate scope for condition review, specification, procurement and works-stage administration. Set out the deliverable and payment point for each stage, the inspection allowance and the trigger for agreeing additional services.

Time-based review or dispute support

Define the documents to review, the technical questions, the reporting output and the authorised time. Agree how further instructions are approved. Technical review does not include legal representation or determine whether a service charge is payable.

Showing the professional fee in the consultation information

Separate professional fees from contractor estimates and identify VAT, assumptions and exclusions so residents can understand the cost information. The landlord or agent and their legal adviser decide what must be included in the statutory notices and estimates. Whether a fee is recoverable depends on the lease, reasonableness and the applicable statutory requirements; an HCS appointment does not guarantee recovery.

Send the building address, proposed works, available reports, consultation stage and target programme so that the scope and fee can be discussed.

Planning or running building works? Send the project details and we'll explain how we can support delivery.

Send project details

Common questions about major works consultancy

Does HCS prepare or serve Section 20 notices?

HCS does not prepare or serve statutory Section 20 notices. HCS provides the specification, tender information and consultation support the landlord or managing agent needs. The notices are issued by the landlord or agent, with their solicitor where required. HCS does not give legal advice.

How long does Section 20 take?

The ordinary qualifying-works route includes two 30-day observation periods. Allow additional time for service, preparing the specification, obtaining estimates, considering observations and arranging the contract. Other procedures can differ; do not treat the two periods alone as a guaranteed start date.

Can works be split to stay under £250?

No. Artificially dividing one scheme into invoices or phases is not a reliable way to avoid consultation. Identify the actual set of qualifying works and each leaseholder’s contribution. Distinct repairs are not automatically one scheme simply because they occur in the same year; obtain advice on the particular facts.

What if the cheapest tender is not chosen?

Price is not the only consideration, but the recommendation should explain scope, qualifications, programme and quality. Under the ordinary qualifying-works procedure, choosing neither the lowest estimate nor a nominee triggers the duty to give reasons within 21 days of entering the contract. The landlord or agent issues the required communication.

Do fire-safety or remediation works need Section 20 consultation?

They can be qualifying works. The safety purpose or urgency does not itself remove consultation requirements. Check the applicable route, any dispensation and separate Building Safety Act leaseholder protections or funding arrangements with legal advisers. Do not assume every remediation cost can be charged to leaseholders.

What happens if consultation was missed?

Relevant recovery may be limited unless the tribunal grants dispensation under section 20ZA. Preserve the specification, estimates, notices, observations and chronology. The Daejan approach considers relevant prejudice to leaseholders; dispensation may have conditions and is not automatic. HCS can provide technical evidence, not legal advice.

Who pays the surveyor’s fee and how is it shown?

The professional appointment identifies the client responsible for the fee. Any recovery through the service charge depends on the lease and statutory requirements. Identify the professional fee separately from works estimates in the cost information and ask the landlord or agent and their adviser to confirm the required disclosure. Read the fee structures and scope questions.

Can HCS act for the RTM company and the freeholder?

Identify the client and proposed duties first. Separate interests can create a conflict, so we check the parties and block before accepting an appointment. HCS will not act against a managing-agent client on the same block or assume authority to represent both sides. Ask us to check the proposed instruction.

Are the Section 20 thresholds changing?

Government has consulted on raising the thresholds and a draft Leasehold and Commonhold Reform Bill was published in January 2026. This page uses the cited thresholds effective from 2003-10-31, not proposed replacement amounts. See the current rules and sources.

Can HCS also tender as the contractor?

Where HCS specifies, tenders or administers a Section 20 programme, HCS will not also tender as contractor.

For leaseholders and residents’ associations

If you have received a Section 20 notice or major-works bill, an independent technical review can examine the proposed scope, evidence of condition, tender comparisons and questions about the standard or extent of work. Council leaseholders can use the same enquiry route; the review does not determine the council’s legal powers or your liability.

Send the notice or bill, specification, estimates and relevant reports, with the building address, landlord or council, managing agent and the names of the parties. We check conflicts before accepting instructions. HCS will not act against a managing-agent client on the same block. A proposed RTM or freeholder appointment also needs a clear client identity and conflict check; do not assume we can represent both sides of a disagreement.

HCS provides surveying evidence and technical questions for the responsible party. Obtain legal advice on notice validity, lease interpretation, payment deadlines, withholding charges or tribunal proceedings. Request a conflict-checked technical review.

Leasehold Works Route

Section 20 leasehold major works from scope to final account

Section 20 major works London instructions sit at the point where building surveying, leaseholder consultation and project delivery meet. We support managing agents, freeholders, RMCs and right to manage companies with the technical documents that make the consultation and works defensible.

Consultation evidence

Under the Landlord and Tenant Act 1985, Section 20 consultation protects leaseholders before qualifying works or long-term agreements are charged through the service charge. LEASE guidance explains the practical risk: if consultation is not followed correctly, recovery may be limited to £250 per leaseholder for major works or £100 per year for a qualifying long-term agreement, unless tribunal dispensation is granted.

Stage control

We prepare the technical scope behind the notice of intention, build the statement of estimates around comparable tender returns, answer leaseholder observations on building matters, and support Section 20ZA dispensation evidence where urgent or historic circumstances make full consultation difficult.

Primary Guidance

Landlord and Tenant Act 1985: Section 20 guidance

The statutory framework behind Section 20 consultation on residential blocks.

Photographs from our survey records

Selected building details from HCS photographic records. These images illustrate the fabric under discussion; a photograph alone is not a diagnosis or a specification for repairs.

Roof covering and rendered parapet above a mansion-block window bay.
Roof covering and rendered parapet above a mansion-block window bay.Read the matching case study
Rear roof edge, brickwork and rainwater details at a mansion block.
Rear roof edge, brickwork and rainwater details at a mansion block.Read the matching case study
Request a Consultation

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Contact our team to discuss specification, procurement or contract administration for your major works programme.

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Reviewed by Savas Bulduk BSc (Hons) MRICS, Director & Chartered Building Surveyor at Hampstead Chartered Surveyors & Building Consultancy.
Role Separation

No HCS contractor tender in an HCS-controlled Section 20 process

Where HCS specifies, tenders or administers a Section 20 major-works programme as professional consultant, HCS will not also tender as contractor. This keeps the specification, tender evaluation and contract decisions free of an HCS delivery interest.

Regulatory updates

Building safety & leasehold briefings

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Direct Enquiry

Enquire about Major Works Consultancy for Residential Blocks

Tell us briefly about the building and what you need. Your enquiry goes directly to our chartered surveying team.

Send the building details and the support you need; we will confirm the next step.

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Send the building details and the support you need; we will confirm the next step.

Major works within a managing-agent panel

Coordinate the Section 20 technical brief with separately appointed contract administration, alterations and party wall support across managed blocks.

Managing-agent panel support and appointment boundaries

Section 20 guides for boards and leaseholders

Scope & Fee Guide

Section 20 Major Works Consultancy London: Deliverables & Transparent Fee Matrix

Every section 20 major works consultancy london instruction is confirmed by a fixed written fee proposal once the property address, tenure and scope are reviewed. Starting fees begin from £1,500 plus VAT; all fee guides below are exclusive of VAT (plus VAT).

Scope / Property BandDeliverables & Technical ScopeTypical TurnaroundTransparent Fee Guide (Excl. VAT)
Band A — Standard / Single-Property Section 20 Major Works Consultancy LondonPre-instruction document review, targeted site inspection or desktop appraisal, and structured RICS-aligned report.3–5 working days from inspectionFrom £1,500 plus VAT (pre-Section-20 diagnostic condition survey, scope options & Stage 1 Notice support)
Band B — Comprehensive Section 20 Major Works Consultancy London InstructionFull site inspection, photographic defect/evidence schedule, regulatory analysis and prioritised cost/action plan.5–8 working days from site accessFrom £2,950 plus VAT (detailed NBS/JCT major-works specification, competitive tender & Stage 2 report)
Band C — Complex, Heritage or Multi-Unit Section 20 Major Works Consultancy LondonListed-building, higher-risk, multi-unit or portfolio instruction with senior director review and adviser coordination.7–12 working days (or agreed milestone)From £4,950 plus VAT (full Section 20 JCT Contract Administration, interim valuations & handover)