Preparing the Islington instruction
This Islington page focuses on the N1 terrace and flat context around Barnsbury and Milner Square. It is not a borough-wide specification. A converted house needs a precise account of its common structure, private accommodation and access arrangements before directors decide what to put out to tender.
A documented group of houses converted to flats
Historic England’s entry for 5–25 Milner Square describes houses now used as flats, built in 1841 and restored in 1978. It records brick with stucco dressings, basements and a continuous entablature. The entry supports the local building-stock context; it is not a current condition survey of those properties.
For another terrace nearby, establish which parts of its apparent architectural composition belong to the client’s building. A continuous decorative feature can cross more than one legal or maintenance boundary. Do not assume that visual symmetry means a shared ownership arrangement or an identical repair obligation.
Local evidence: Historic England: 5-25 Milner Square, entry 1208015.
Describe small repair locations before grouping them
A schedule for stucco or brickwork should identify the face, level and extent of the observed issue. Distinguish surface finish from the substrate and record what inspection could establish safely. If opening-up is needed, explain the question it is intended to answer and how the result will affect the proposed treatment.
Group related items for efficient pricing only after their locations remain traceable. Directors and leaseholders should still be able to understand why a particular cornice, sill or rainwater connection is included. An allowance labelled simply external repairs gives too little information for a meaningful technical response.
Work through lower-ground and rear-access constraints
For a basement entrance or rear garden route, check the available width, changes in level and relationship to occupied rooms. Confirm the permissions needed to use private space. A contractor’s access drawing should identify protective measures without implying that the landlord can automatically occupy a resident’s garden.
Record any inspection that depends on access through a flat and agree how missed appointments will be managed. A programme built on unconfirmed access can create avoidable changes after tender. The managing agent can coordinate contacts while limiting the personal information circulated with the technical documents.
Compare repair options on consistent assumptions
Where repair and replacement are both considered, describe the evidence for each option and any unresolved consent requirement. Ask tenderers to identify which option they have priced. A cheaper quotation is not directly comparable if it assumes a finish or detail that the client has not approved.
Use the observation responses to clarify the purpose of the works rather than repeating the entire specification. Questions about historic features may require conservation input; questions about recovery of expenditure need lease advice. Keep the written record clear about which adviser supplied each conclusion.
Set out the appointment and retained obligations
A fee request should identify how many houses or blocks are included and whether measured drawings already exist. State the investigation, tender and construction stages required. If the directors are considering contract administration, define it as an appointment with its own duties rather than assuming it follows automatically from writing the specification.
At the end of the project, retain a location-based defect list and photographs of work that will be concealed. Record any deferred repair as a separate future decision. This avoids giving incoming directors the impression that a completed decorating contract resolved every maintenance question for the terrace.
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.
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.
Where HCS specifies, tenders or administers a Section 20 programme, HCS will not also tender as contractor.
Local sources checked
Local sources checked 2 October 2026. The dated character records describe residential stock; current permissions and the condition of the instructed building need separate checks.
- Historic England: 5-25 Milner Square, entry 1208015 — List entry 1208015, Details: 5-25 Milner Square, houses now flats
Islington major works questions
Does the Milner Square example mean HCS has worked on that terrace?
No. It is a published statutory-list entry used to demonstrate local residential stock. No HCS appointment or outcome is claimed. The scope and condition of a client’s property must be established through its own instruction and evidence.
Can one decorative feature involve several owners?
Its appearance alone cannot answer that. Review the title and lease information, then relate the proposed works to a measured location plan. Where a boundary or right is uncertain, obtain the relevant advice before tenderers rely on a shared-access or shared-cost assumption.
What should an opening-up proposal explain?
Identify the location, question to be answered and the way the findings could change the repair. State who agrees the investigation and any specialist input needed. This gives directors a reasoned basis for commissioning further evidence before they commit to a wider replacement scheme.
Related services and guidance
- London Section 20 and major works consultancy
- Islington area guide
- North London area hub
- Islington contract administration
- Islington licence-to-alter advice
- Islington party wall advice
- Professional support for managing agents
- Section 20 consultation stages
- Planning repairs and reserve funding
- Check consultation thresholds
- Plan indicative consultation dates
Other central London Section 20 guidance
Discuss the Islington block repair brief
Send the property address, available reports and the decision needing technical support.
New local guidance is prepared by Hampstead Chartered Surveyors & Building Consultancy. The review attribution above covers the previously published service guidance; local source checks are recorded separately.