EWS1 Certificates: When a Flat Valuation Asks for One, and What to Check Before You Offer (England & Wales)

An EWS1 certificate is a lender-facing external wall conclusion form, not a life-safety certificate. It exists to help valuers and mortgage lenders decide whether external-wall materials affect a flat’s lending risk. Buyers, sellers, leaseholders and mortgage applicants encounter it mainly when a building has visible cladding, balconies or curtain glazing above a certain height, and increasingly the underlying evidence comes from a PAS 9980-based FRAEW rather than the form itself.

TL;DR:

• Most flats do not require an EWS1 certificate, as only around 9% of valuations involve buildings with specific risk factors like cladding or height.
• The EWS1 form records an assessment outcome with options indicating fire safety risk, but the rating can significantly impact mortgage availability.
• Lenders’ requests for EWS1 or FRAEW evidence depend on their risk appetite, which varies, meaning two lenders can give different assessments for the same building.
• The technical evaluation behind the EWS1 relies on PAS 9980 standards, with recent shifts favoring direct acceptance of a FRAEW executive summary over a standalone form.
• Early investigation, including asking about existing assessments and reviewing building data, can prevent costly delays and help determine if further fire safety checks are necessary.

Table of Contents

• What an EWS1 certificate actually covers
• When and why lenders ask for an EWS1
• Who can sign an EWS1, and why professional indemnity cover matters
• FRAEW and PAS 9980: the technical work behind the form
• How EWS1 status affects buying, selling and remortgaging
• Costs, validity and how long the process takes
• A step-by-step checklist for buyers, sellers and solicitors
• Statutory protections and regional differences across the UK
• Data can flag the risk, but it can’t replace the technical work
• Getting an early, honest read before you commit to a purchase
• Why lender caution outlasts the paperwork
• Sources
• FAQ

What an EWS1 certificate actually covers

The EWS1 form is short by design. It identifies the building, records which assessment route was used, and carries the signature and professional details of whoever completed the review, alongside supporting photographs of the external wall system. It was introduced in December 2019 by RICS and UK Finance as a standardised way for lenders to get a quick, comparable answer across thousands of blocks of flats, rather than commissioning a bespoke report for every valuation.

The form’s real content sits in the option it records, not the paperwork itself.

• Option A confirms the external wall materials are unlikely to support combustion, or that any risk is already managed, meaning lenders can generally proceed without extra conditions.
• Option B flags that remediation may be needed. Within that, B1 means no remedial works are currently required, while B2 means works are needed before the form can support lending.
• Sub-ratings such as A1 to A3 and B1 to B2 matter because a lender’s underwriter will read past the headline letter. A B1 rating with a clear remediation timeline behaves very differently in practice from a B2 rating with an open-ended repair schedule.

The distinction between rating letters explains why two flats in the same block can have wildly different mortgage outcomes. One seller might sail through a remortgage while a neighbour two floors up gets an on-hold valuation, purely because their EWS1 sits on the wrong side of the A/B line. It’s worth remembering the form itself is a conclusion. The technical work that produces it, a fire risk appraisal carried out to PAS 9980, is where the actual judgement happens.

When and why lenders ask for an EWS1

Lenders typically request an EWS1 when a building shows visible combustible cladding, has balconies stacked directly above one another, uses curtain wall glazing, or exceeds a height threshold that varies by lender policy, commonly around 11 metres or five storeys. None of this is set in statute. It’s market practice, shaped by each lender’s own risk appetite, which is why two banks can look at the same block and reach different conclusions about what evidence they need.

In the numbers: during July to September 2024, six reporting UK lenders carried out 41,000 mortgage valuations for flats, and an EWS1 or equivalent was required in around 9% of those cases.

That figure tells you something useful: for the vast majority of flat purchases, an EWS1 never comes up at all. It’s concentrated in a specific slice of the market, mid-rise and high-rise buildings with particular construction features, rather than a universal hurdle every leaseholder will face.

The practical takeaway is to find out early, not late. Ask the estate agent, the seller’s solicitor or the management company whether the building has ever required an EWS1, and if so, which rating it holds and when it was issued. A mortgage broker can usually confirm within a day or two whether your specific lender treats the building’s height and construction type as a trigger. Doing this before an offer is accepted saves weeks of delay further down the chain.

Who can sign an EWS1, and why professional indemnity cover matters

Not just anyone can complete this assessment. The route depends on the option being reported.

• Option A conclusions, where risk is low or already managed, can often be signed by a suitably experienced fire engineer or a chartered surveyor working within RICS-aligned competence frameworks.
• Option B conclusions, especially where remediation is flagged, generally need a chartered fire engineer or an assessor whose competence is explicitly aligned with PAS 9980 methodology.
• Every signatory needs professional indemnity insurance that specifically covers external wall fire risk work, not just general surveying PI cover.

Pro Tip: Before you rely on an existing EWS1, ask the seller’s solicitor to confirm the signatory’s PI cover was valid and scoped for external wall assessments at the time of signing. A form signed by someone whose PI didn’t cover this type of work can be rejected outright by a lender’s valuer, even if the technical conclusion looks sound.

This is where transactions quietly stall. A form might read as broadly reassuring, but if the signatory’s indemnity cover has since lapsed, or never covered this class of risk in the first place, a cautious lender will simply refuse to rely on it and ask for a fresh assessment. Given that a full reassessment can add weeks to a purchase, checking the signatory’s credentials is worth doing before you’re deep into a chain.

FRAEW and PAS 9980: the technical work behind the form

A Fire Risk Appraisal of External Walls, or FRAEW, is the detailed technical assessment carried out in line with PAS 9980, the British Standards Institution’s methodology for judging external wall fire risk proportionately rather than applying a blanket worst-case assumption. The EWS1 form is essentially a short summary of a FRAEW’s conclusion, translated into a format lenders can process quickly.

Government guidance describes the FRAEW as the substance and the EWS1 as the reporting form built on top of it. Increasingly, that relationship is shifting. RICS has signalled it expects lenders to move toward accepting a FRAEW executive summary directly, rather than insisting on a separate EWS1 form layered on top.

• If your building already has a recent FRAEW carried out to PAS 9980, ask whether the lender will accept its executive summary as standalone evidence.
• Check the date. A FRAEW carried out before PAS 9980 was formalised may need updating to match current methodology.
• Where remediation work was recommended, ask for evidence it has been completed or scheduled, since this often determines whether a lender treats the property as an A or B outcome in practice.

RICS’ own updated professional standard makes the direction of travel explicit: fewer standalone EWS1 requests over time, more reliance on PAS 9980-informed evidence that already sits within a building’s fire risk assessment. For now, though, individual lender policy still decides what gets accepted on any single transaction.

How EWS1 status affects buying, selling and remortgaging

A missing or unfavourable EWS1 rarely kills a transaction outright, but it reliably slows it down. Here’s what typically happens along the way.

1. The lender pauses the valuation. If the building falls into a category the lender flags, the valuer will request an EWS1 or equivalent evidence before completing the report, which can add weeks if the building doesn’t already have one.
2. Conditions get attached to the mortgage offer. A B2 rating, or the absence of any assessment, can lead the lender to reduce the loan-to-value ratio, request a retention, or decline the application until remediation evidence is provided.
3. Someone has to commission the assessment. This is usually the freeholder or managing agent, since it covers the whole building rather than one flat, and leaseholders often have limited power to force the pace.
4. Leaseholder protection rules may cap costs. Under the Building Safety Act 2022’s leaseholder protections, qualifying leaseholders in certain circumstances won’t bear remediation costs directly, since developers or building owners may be liable instead.

Ask early for the building’s fire risk assessment, any existing FRAEW, the landlord certificate confirming remediation status, and any prior EWS1. A solicitor who chases these documents in week one, rather than week six, is the single biggest lever for keeping a cladding-affected transaction on schedule.

Costs, validity and how long the process takes

Costs vary enormously depending on what’s actually needed. A straightforward Option A assessment on a smaller block might run to a few hundred pounds in surveyor fees, while a full FRAEW to PAS 9980 standard on a larger or more complex building, particularly one requiring intrusive investigation of wall cavities, can run into several thousand pounds. Where remediation work is identified, that figure becomes a different order of magnitude entirely, and it’s separate from the assessment cost itself.

• Commissioning a straightforward assessment typically takes a few weeks from instruction to report.
• A full FRAEW involving intrusive surveys can take considerably longer, sometimes several months, particularly where scaffolding access is required.
• The form is generally treated as valid for around five years, though this is a convention rather than a fixed rule, and individual lenders retain discretion over whether to accept an ageing form or insist on a refresh.

In the numbers: with EWS1 or equivalent required in only around 9% of flat valuations nationally, most sellers won’t need to budget for a fresh assessment at all, but those in affected buildings should assume they might.

Cost responsibility usually falls to the freeholder or management company as a service charge item, though leaseholder protection rules can shift that burden onto developers in qualifying buildings. Buyers should ask directly who is paying before assuming the cost sits with them.

A step-by-step checklist for buyers, sellers and solicitors

Different parties in the chain need different information, and asking for it in the wrong order is what causes delay.

1. Buyers: confirm your lender’s EWS1 policy for the building’s height and construction type before making an offer, then request the FRAEW, landlord certificate and any existing EWS1 through your solicitor immediately after the offer is accepted.
2. Sellers and building owners: if no EWS1 exists and the building might trigger a lender request, commission a FRAEW to PAS 9980 standard proactively rather than waiting for a buyer’s mortgage application to stall. Share the landlord certificate and any remediation timeline with agents upfront.
3. Brokers and solicitors: confirm in writing with the lender’s underwriting team exactly what evidence they’ll accept, a full EWS1, a FRAEW summary, or both, before the valuation is instructed, since this avoids a second round trip if the first submission is rejected.
4. Chasing management companies: request the FRA, FRAEW and landlord certificate by name in your first letter, with a specific deadline, rather than a general enquiry about “fire safety documents.” Vague requests get vague, slow responses.

A buyer who does this groundwork in the first week of a transaction, rather than discovering the issue when a valuation comes back conditional, typically saves a month or more of chain-wide delay.

Statutory protections and regional differences across the UK

England and Wales operate under the same core statutory framework. The Fire Safety Act 2021 clarified that building owners’ fire risk assessment duties explicitly extend to external walls and cladding, closing a gap that had left this area ambiguous. The Building Safety Act 2022 built on that by introducing leaseholder protections and the landlord certificate, a document confirming a building’s remediation status and who’s liable for costs.

• England and Wales: the landlord certificate and leaseholder protection rules apply directly, and qualifying leaseholders in relevant buildings may be shielded from remediation costs.
• Scotland: the regulatory framework differs, and buildings may need separate fire safety assessments outside the EWS1 system entirely, so checking with a local solicitor familiar with Scottish practice matters more than applying English guidance directly.
• Northern Ireland: practice varies further still, and readers should check current guidance with local professional bodies rather than assuming England and Wales rules transfer across.

Statutory change has narrowed the gaps that once left leaseholders exposed to open-ended costs, but it hasn’t removed lender discretion. Two lenders can look at the same landlord certificate and reach different underwriting decisions, which is exactly why confirming policy with your specific lender still matters more than reading general guidance alone.

Data can flag the risk, but it can’t replace the technical work

Cladding risk isn’t something you can spot from a listing photo, and it’s exactly the kind of blind spot that catches buyers halfway through a purchase. Postcode-level, human-checked data has a real role here, not as a substitute for the technical assessment, but as an early filter that tells you whether it’s even worth budgeting for one.

Some reports pull together planning history, building context and locally recorded risk factors for any postcode in England and Wales, checked by a named analyst rather than left as raw automated output. That’s not the same as reading a FRAEW or an EWS1, and it never will be. What it can do is give a buyer a plain-English early signal, is this a taller block, does the area show a pattern of similar buildings with known cladding issues, before they’ve paid for a survey or committed to a mortgage application.

The sensible workflow is straightforward: order a Nofooly report early in your search, use it to decide whether a building warrants extra questions about fire safety documentation, then commission the actual technical assessment, FRAEW, EWS1, or a solicitor’s enquiry to the management company, once you know it’s worth the cost. Data narrows down where to look. It was never going to replace the fire engineer who signs the form.

Getting an early, honest read before you commit to a purchase

Cladding issues rarely announce themselves in a property listing, and by the time a lender flags a missing EWS1, you’ve often already paid for a survey and a solicitor’s initial searches. Nofooly exists precisely for that gap between “this looks like a nice flat” and “I’ve committed money to find out.”

The £9 Instant Report gives you a plain-English postcode-level picture within minutes, covering planning applications nearby, flood risk, crime data and the kind of local context that hints at whether a building or area carries above-average risk factors. Step up to the £29 Area Report and a named analyst reads the data against your own written brief and deal-breakers, adding sale history and a verdict tailored to your situation, delivered within one working day. Neither product is a survey, a FRAEW or an EWS1, and neither of the checks building condition or fire safety compliance directly. Both cover England and Wales only.

What they do offer is an honest, low-cost first pass before you spend real money on professional fees. If such a report flags something worth investigating, planning history suggesting recent cladding work, or a building type known for taller construction, that’s a cue to ask the estate agent about the EWS1 status before going any further. Order an Instant Report and find out what the postcode actually tells you.

Why lender caution outlasts the paperwork

The conventional wisdom treats EWS1 as a pass/fail gate: get the form, get the mortgage. That’s backwards. The form is a summary of someone else’s technical judgement, and lenders have learned, sometimes expensively, that summaries can hide weak underlying work. What’s changed since the early panic years isn’t that cladding risk disappeared. It’s that the industry finally built a proportionate methodology, PAS 9980, to stop every building being treated as a worst-case scenario regardless of actual construction.

What still gets underestimated is how much this comes down to one lender’s risk appetite versus another’s. Two buyers on the same building, applying to different lenders, can have completely different experiences. One sails through, the other gets a conditional offer demanding a fresh FRAEW. That’s not a flaw in the system so much as an honest reflection of a market still calibrating how much weight to put on PAS 9980 evidence versus the older EWS1 shorthand.

The practical lesson for anyone buying, selling or remortgaging a flat is to stop treating the EWS1 as the finish line and start treating it as one piece of evidence among several. Ask for the FRAEW behind it. Check the signatory’s PI cover. Confirm your specific lender’s current policy rather than relying on what worked for a friend’s purchase eighteen months ago. The paperwork keeps evolving. The underlying question, is this building’s external wall construction actually a risk, hasn’t changed at all.

— Gracie C

This article is general information, not a substitute for advice from a qualified financial advisor. Consult a qualified financial professional about your own circumstances before acting on anything here.

Sources

• Gov
• RICS publishes updated standard for multi-storey residential buildings with cladding

FAQ

Can I sell my flat without an EWS1 certificate?

Yes, in most cases. Since EWS1 or equivalent evidence is only required for around 9% of flat mortgage valuations, most sales proceed without one. It only becomes a blocker when your buyer’s lender flags the building based on its height, cladding, or construction type.

Are lenders still asking for EWS1 forms?

Yes, but selectively rather than routinely. Lenders now increasingly accept a FRAEW executive summary carried out to PAS 9980 instead of a standalone EWS1, following RICS’ updated guidance encouraging that shift.

How much does an EWS1 certificate cost?

Costs vary widely depending on building complexity, from a few hundred pounds for a straightforward Option A assessment to several thousand for a full FRAEW involving intrusive surveys. The cost typically falls to the freeholder or management company, though leaseholder protection rules can shift liability to developers in qualifying buildings.

Do all flats need an EWS1 certificate?

No. Only buildings that meet specific lender triggers, typically visible combustible cladding, stacked balconies, curtain glazing, or height thresholds around five storeys, tend to need one. A Nofooly Instant Report can help flag whether a postcode’s building stock and planning history suggest checking further before you commit to a purchase.