Can one EPC cover a whole block of flats?

No. Each self-contained flat being sold or let needs its own EPC lodged against its own address. There is no whole-block domestic certificate.

How long does a block of twenty flats take?

Access permitting, a block of that size is usually surveyed across one or two days, with certificates lodged as each flat is completed rather than held back until the end.

Do identical flats still need separate surveys?

Yes. Each flat is individually assessed because floor position, exposure, heating and glazing differ, and each certificate must reflect the dwelling it is lodged against.

Is a batch cheaper than booking flats individually?

Substantially. Travel, access coordination and administration are shared across the batch, so guide rates for blocks sit well below single-property rates and fall further as volume grows.

Guide · guides

EPCs for a block of flats: how many you need and what it costs

A block does not get one EPC. Each self-contained flat that is sold or let needs its own certificate, which is why blocks are quoted per flat and organised as a single visit programme rather than a string of separate bookings.

11 min readBy Nabhan Islam Reviewed by Awais Sarwar, MSc Updated 9 Sept 2026

The short answer

Each self-contained flat that is being sold or let needs its own EPC — a block is never covered by a single certificate. Communal areas such as stairwells, plant rooms and corridors do not need a domestic EPC in their own right, although a non-domestic EPC can be required where a commercial unit or a separately let non-domestic space forms part of the building. Because the assessor is on site anyway, blocks are priced per flat on a sliding scale rather than at single-property rates, and the whole block is normally surveyed across one or two visit days with a single access contact.

020 3092 8551

Certificates required

one per self-contained flat

for each flat being sold or let

Communal areas

no domestic EPC needed

non-domestic EPC may apply to commercial parts

Typical guide rate

£24-£45 per flat

falls as the batch grows; confirmed in writing

Certificate validity

10 years

per flat, from the lodgement date

One certificate per flat, not one per building

The legal duty attaches to the dwelling being marketed for sale or let, so a block of twenty flats being re-let over a year needs twenty certificates, each recorded on the EPC Register against its own address. Managing agents sometimes expect a single building-level certificate because that is how fire risk assessments and electrical installation reports for communal areas work, but energy assessment does not behave that way: the model runs on the individual dwelling's fabric, heating, glazing and floor position. A top-floor flat under an uninsulated roof and a mid-floor flat with heated neighbours above and below will produce noticeably different ratings even in an identical block.

Every self-contained flat sold or let needs its own certificate against its own address
Ratings legitimately differ between flats in the same block because of floor position and exposure
Each certificate lasts ten years from its own lodgement date, so a block gradually falls out of step
A flat schedule listing flat numbers, bedrooms and tenure is the fastest way to get an accurate quote

Where communal and commercial parts fit in

Communal stairwells, corridors, bin stores and plant rooms are not dwellings, so they do not receive a domestic EPC. Where a building includes a commercial unit — a shop on the ground floor, a separately let office, a managed commercial space — that unit is a non-domestic property and needs a non-domestic EPC when it is sold or let, produced by a commercially accredited assessor at the appropriate level. Mixed-use buildings therefore often need two workstreams on the same visit: domestic assessments upstairs and a non-domestic assessment for the commercial part. Running both together avoids two mobilisations and keeps one point of contact for the whole building.

Communal circulation space needs no domestic EPC of its own
Commercial units within the block need non-domestic EPCs when sold or let
Mixed-use buildings are best surveyed in one mobilisation covering both workstreams
Fire, electrical and energy compliance for communal areas are separate duties with separate documents

The buildings behind this advice

How a block survey is actually organised

The practical problem with a block is rarely the assessment; it is access. A batch of thirty flats booked individually can take weeks of phone calls, missed appointments and repeat visits. Handled as a contract, the block is planned as a programme: we agree survey days, confirm which flats are vacant, which are tenanted and where keys sit, and give the access contact a time window per flat rather than an all-day wait. Tenanted flats are notified in advance by the agent or landlord so entry is expected, and any flats missed on the day are collected on a mop-up visit rather than triggering a fresh booking process.

Agree survey days up front and work through the block floor by floor
Confirm vacant, tenanted and key-held flats before the visit, not on the doorstep
One access contact with a per-flat time window cuts failed entries dramatically
Missed flats are collected on a planned mop-up rather than rebooked from scratch

Why per-flat rates fall on a batch

Single-property pricing carries the full cost of travel, scheduling, access chasing and administration for one certificate. On a block, those costs are spread: one journey, one access contact, one instruction, one invoice and consecutive surveys with no dead travel between them. That is why guide rates for blocks sit well below single-property rates and continue to fall as the batch grows. The honest caveat is that per-flat time does not drop to zero — every flat still needs measuring, photographing, evidence collection and individual lodgement — so beyond a certain point the rate flattens out. Anyone quoting a rate that ignores that is either not visiting every flat or not lodging every certificate properly.

Travel, scheduling and administration are shared across the batch, not repeated per flat
Consecutive surveys in one building remove dead time between appointments
Rates flatten at high volume because survey and lodgement time per flat is irreducible
One instruction and one invoice replaces dozens of separate transactions

What to send us to get a firm price

A firm per-flat rate needs surprisingly little: the building address, the number of self-contained flats, a rough bedroom mix, whether any commercial units are included, and when the certificates need to be lodged. If a flat schedule already exists in a spreadsheet, sending it as-is is quicker than filling in a form. With that, we confirm a fixed per-flat rate in writing, usually the same day, along with the survey days we can hold and the lodgement date we will work to. Nothing is estimated after the event: the rate you approve is the rate invoiced, with any genuinely additional work — say a commercial unit added later — quoted separately before it is carried out.