EPC vs Floor Plan vs House Survey: Which Do You Need?

If you are selling, letting or buying a home, three documents keep coming up: the EPC, the floor plan and the house survey. They sound interchangeable and often get muddled together, but they do entirely different jobs, are produced by different professionals, and only one of them is required by law. Here is a plain-English breakdown of which you actually need.

The EPC: legally required to sell or let

An Energy Performance Certificate rates a property's energy efficiency on a scale from A (most efficient) to G (least efficient). It is produced by an accredited Domestic Energy Assessor (DEA), who visits the property to record its construction, insulation, heating system, glazing and hot water arrangements.

Key facts:

• It is a legal requirement. You must have an EPC, or at least have commissioned one, before marketing a property for sale or rent in England and Wales.
• It lasts 10 years. Once lodged on the government EPC register, the certificate is valid for a decade and can be reused for multiple sales or tenancies in that time.
• Landlords have a minimum standard. Under the Minimum Energy Efficiency Standards (MEES), a rented property generally needs a rating of E or above, and letting a sub-standard property can attract fines of up to £5,000.
• It includes recommendations. Every EPC lists improvements, such as insulation or heating upgrades, and the rating each could achieve.

What it does not do is tell you anything about the property's condition. An EPC will not flag damp, subsidence or a leaking roof. It answers one question only: how energy efficient is this home?

L&D Energy provides domestic EPCs from £49 across all 32 London boroughs, with the certificate delivered within 72 hours as standard or next-day for £12 extra.

The floor plan: not legally required, but expected

A floor plan is a scaled drawing of the property's layout, showing rooms, dimensions and total floor area. There is no law saying you need one to sell or let. In practice, though, it is close to non-negotiable.

• Virtually all estate agents include a floor plan in sales listings, and most lettings listings carry one too.
• Rightmove's research into buyer behaviour has long found that most buyers expect a floor plan and consider listings without one less seriously. Agents consistently report the same.
• A plan lets buyers and renters judge whether the layout works for them before booking a viewing, which means fewer wasted appointments.
• It evidences the floor area, which buyers increasingly use to compare value per square metre.

A floor plan is produced by anyone competent with measurement and drawing software, commonly an energy assessor, a photographer or an inventory clerk. There is no statutory register and no expiry date; it stays accurate until you change the layout.

L&D Energy produces professional floor plans from £49. Because we measure every room during an EPC visit anyway, a floor plan ordered alongside an EPC is half price. One visit, one set of measurements, two documents.

The house survey: for buyers, about condition

A house survey is a professional inspection of the property's condition, commissioned by the buyer before completing a purchase. It is carried out by a chartered surveyor regulated by RICS (the Royal Institution of Chartered Surveyors) and comes in three standard levels:

• RICS Home Survey Level 1: a basic condition report for conventional, newer properties in apparently good order.
• RICS Home Survey Level 2: the most common choice, a homebuyer-style report covering visible defects, damp, timber issues and urgent repairs.
• RICS Home Survey Level 3: a full building survey for older, larger, altered or visibly problematic properties, with detailed analysis of construction and defects.

A survey can flag problems that justify renegotiating the price or walking away. It is not a legal requirement either, but most mortgage lenders' valuations are not a substitute for one, and skipping a survey on an older property is a genuine risk.

To be completely upfront: L&D Energy does not provide house surveys. Surveying is a separate chartered profession, and an energy assessor is not qualified to report on structural condition. If you are buying, instruct a RICS chartered surveyor directly.

Side-by-side comparison

Which do you need in your situation?

If you are selling

You need an EPC before the property goes on the market, unless a valid one already exists on the register from the last 10 years. You will almost certainly want a floor plan for the listing, since agents rely on them and most buyers expect one. You do not arrange a survey; that is the buyer's job.

Practical tip: order the EPC and floor plan together before instructing your agent, so the listing can go live without delay. Our sellers page walks through the full process.

If you are letting

You need an EPC with a rating of at least E before a new tenancy begins, and it must be given to the tenant. Letting below an E without a valid exemption risks MEES penalties of up to £5,000. A floor plan is optional but helps a lettings listing stand out and reduces no-show viewings. A survey is not relevant to landlords in the ordinary course of letting.

If you are buying

The seller should already have provided an EPC in the listing; check it on the government register and look at the recommendations to estimate future improvement costs. The floor plan comes with the listing too. The document you actively need to commission is a house survey, with Level 2 suiting most conventional homes and Level 3 worth the extra cost for period, extended or visibly tired properties.

Why the EPC and floor plan bundle makes sense

Producing a floor plan and producing an EPC both start with the same task: measuring every room in the property. When the two are ordered separately from different providers, you pay twice for that measuring and host two appointments.

Ordering them together means:

• One visit. The assessor measures the property once and uses the data for both documents.
• Half price on the plan. Because the measurement work is already done, L&D Energy charges 50% off the floor plan when it is bundled with an EPC.
• Consistency. The floor area on your listing matches the floor area behind your EPC, which avoids awkward questions from buyers and conveyancers.

Current bundle prices are on our pricing page, and both services are available across all 32 London boroughs from our Stratford base.

The short answer

An EPC rates energy efficiency and is the only legal requirement. A floor plan sells the layout and is expected even though it is optional. A survey protects the buyer from hidden defects and is commissioned by them, not you. If you are putting a London property on the market, the practical move is one booking covering the EPC and the floor plan together, then leaving the survey to whoever buys.