Reserve Funds for Blocks of Flats: How Much to Hold and How to Plan

Every building eventually needs a new roof, a lift overhaul, external redecoration or replacement windows. A reserve fund (sometimes called a sinking fund) lets leaseholders save for those costs steadily over the years, so that when the work is due the money is ready and the building stays in good order. This guide explains how reserve funds work and how to decide how much to hold.

What a reserve fund is for

A reserve fund is money collected through the service charge and set aside for future expenditure, rather than for the running costs of the current year. It typically covers:

• Cyclical work such as external and internal redecoration
• Replacement of major building elements: roofs, windows, balconies, entrance doors
• Plant and equipment: lifts, boilers, pumps, door entry, fire alarm and emergency lighting systems
• Larger repairs that are predictable even if their exact timing varies

Spreading these costs means each leaseholder pays a fair share for the years they own the flat, and avoids one owner facing a very large bill simply because they happen to own at the time the roof is replaced.

Start with the lease

A reserve fund can only be collected where the lease allows it. Most modern leases include a reserve or sinking fund provision, and some specify what it can be used for. Before setting contributions, check:

• Whether the lease permits a reserve fund, and on what terms
• Whether there is a single fund or separate funds (for example for lifts, or for different blocks on an estate)
• How each flat's share is calculated
• Whether the lease limits what the fund can be spent on

Where the lease is silent or unclear, take advice before collecting reserves. If leases differ between flats, the fund needs to be managed in a way that respects each lease.

How much to hold: plan, then calculate

The right reserve fund depends entirely on the building. A fixed percentage applied to every block will be too much for some and far too little for others, so the reliable approach is to work from the building itself.

1. Survey the building

Start with a condition survey that lists the main building elements, their current condition and their expected remaining life. Our construction background is a real help here: knowing how a flat roof, a lift or a render system actually ages makes the plan far more accurate.

2. Build a planned maintenance programme

Turn the survey into a programme covering at least ten years, and ideally longer for big items such as roofs and lifts. For each item, record what is needed, roughly when, and an estimated cost based on current prices.

3. Work out the annual contribution

Add up the expected spending year by year and set contributions so the fund stays positive throughout, with a sensible margin for the unexpected. Allow for building cost inflation, and plan for large projects to be phased where that makes sense for the building.

4. Review every year

Update the programme each year as work is completed, condition changes and prices move. A plan that is reviewed annually keeps contributions steady and avoids sudden jumps.

How reserve funds are held

Service charge contributions, including reserves, are held on trust for the leaseholders under section 42 of the Landlord and Tenant Act 1987. In practice that means the money should be kept in a separate client bank account, apart from the landlord's or the managing agent's own money, and accounted for clearly. Leaseholders should be able to see the balance of the fund in the year-end service charge accounts, along with what was paid in and what was spent.

Reserve funds and Section 20

Having the money saved is separate from the duty to consult. Where major works will cost any one leaseholder more than £250, the Section 20 consultation requirements still apply, even if the cost will be met entirely from the reserve fund. See our guide to Section 20 consultation for the steps.

What a ten-year plan usually covers

Every building is different, but a planned maintenance programme for a typical block lists items such as:

• Roof coverings, flashings, gutters and rainwater pipes
• External walls, render, pointing, balconies and railings
• Windows and communal entrance doors, where the lease makes them the building's responsibility
• Internal and external redecoration cycles
• Lifts, including major component replacement and modernisation
• Fire alarm, emergency lighting, smoke ventilation and door entry systems
• Communal heating, hot water and water pumps
• Paths, car parks, boundary walls and landscaping

For each item the plan records the expected timing and an estimated cost, so the board can see at a glance when the big projects will fall due and how the fund will meet them.

Explaining the reserve fund to leaseholders

Leaseholders are far more comfortable paying into a reserve fund when they can see what it is for. A short note with each budget, showing the planned projects for the next few years, the expected fund balance and how contributions have been calculated, builds confidence and makes later Section 20 consultations much smoother. Buyers and their solicitors also value a well-documented reserve fund, because it shows the building is being looked after.

Estates with more than one block

On estates with several blocks, or with houses and flats sharing common areas, separate reserve funds or separate schedules are often the fairest approach, so each group of leaseholders saves for the parts of the estate they pay for. The lease will usually set out the schedules; a good managing agent keeps each one clearly accounted for.

A quick checklist for directors

• Confirm the lease allows a reserve fund and what it may be used for
• Commission or update a condition survey
• Prepare a planned maintenance programme of at least ten years
• Set contributions from the programme and explain them in the budget
• Hold the fund in a separate client bank account and report the balance each year
• Review the programme and contributions annually

At Westbridge, every budget we prepare links the reserve fund to a planned maintenance programme, so leaseholders can see exactly what they are saving for and when. If you would like a review of your building's reserves, request a free building review, and see our service charge and accounts service for how we report.