Top 7 Updates in the Latest Red Book Standards

If I work with UK property valuations, I now need to follow two live Red Book updates: the global rules from 31 January 2025 and the UK Supplement from 1 May 2024. Together, they change how I set terms, pick methods, use models, record data, deal with ESG, and write reports.

Here’s the short version:

• The VPS structure has changed from 5 standards to 6
• Methods and models are now split into separate rules
• I must explain why I chose a method
• AI and AVMs need tighter checks and cannot stand alone without valuer judgement
• ESG must be dealt with throughout the valuation process
• Reports must show key data sources and any models used
• UK rotation rules now apply to some regulated purpose valuations:
  • 5 years for the individual valuer
  • 10 years for the firm
  • 3-year stand-down period

For larger companies, the UK Supplement matters even more. Rotation rules can apply where an entity meets at least 2 of 3 tests:

• turnover above £36 million
• balance sheet total above £18 million
• more than 250 employees

RICS Valuation – Global Standards (January 2025)

Quick comparison

Update	What I need to do
New VPS layout	Update templates, references, and internal checks
Method selection	Record why a method fits the asset and purpose
Model rules	Log inputs, testing, limits, and model use
ESG treatment	Cover ESG at instruction, inspection, and reporting stage
Data and records	Keep a file another valuer can follow
AI and AVMs	Review outputs and record human judgement
UK Supplement	Check rotation, independence, and record-keeping duties

Put simply, the latest Red Book asks me to show more of my reasoning, keep better records, and be much clearer about data, models, and ESG in every valuation.

1. Revised Red Book structure and a new VPS layout

The 2025 edition reshapes the core Valuation Technical and Performance Standards (VPS), taking the number of mandatory VPSs from five to six.^[2][6] PS 1 and PS 2 still follow the same broad structure, but both have been updated to make the mandatory rules on written valuations and ethical conduct clearer.^[2][3]

The main structural shift is the split of former VPS 5 into two separate standards. Valuation approaches and methods now sit in VPS 3, while the new VPS 5 deals with valuation models. Put simply, the Red Book now draws a cleaner line between choosing a method and using a model to carry it out.

That matters more than it might seem at first glance. AI, AVMs and valuation software can all support the process, but the valuation only stands when the valuer applies professional judgement. In other words, the software can help with the heavy lifting, but it can't take the wheel. This split also leads into the next change: clearer rules on how valuers must choose and justify their methods.

The table below shows how the old numbering moves into the new structure.^[2][3][6]

Old VPS Reference	New VPS Reference	Title / Focus
VPS 1	VPS 1	Terms of engagement - must now include requirements for considering significant ESG factors.
VPS 4	VPS 2	Bases of value, assumptions and special assumptions - now explicitly covers the treatment of transaction costs.
VPS 5 (part)	VPS 3	Valuation approaches and methods - explicitly includes methods alongside approaches and requires justification of the chosen method.
VPS 2	VPS 4	Inspections, investigations and records - renumbered to reflect updated documentation requirements, including ESG-related investigations.
New standard	VPS 5	Valuation models - new mandatory standard for quantitative tools, including AI and AVMs; valuers must take responsibility for the model's integrity and suitability.
VPS 3	VPS 6	Valuation reports - must reference any models used and document significant ESG factors and key data sources.

In practice, the new layout makes the distinction much sharper: selecting a valuation method is one task, and using a model to support that method is another.

2. Clearer rules on valuation approaches and method selection

VPS 3 now draws a clearer line between approach, method and model. An approach is the broad route used to reach a value. A method is the specific technique used within that route. So, for instance, the income approach might use the investment, profits or residual method, depending on the asset. VPS 3 says valuers must choose and justify the most suitable approach and method for the asset in question and for the intended use of the valuation ^[2][3].

The main shift here is simple: the valuer has to show their working. It’s no longer enough to pick a method that seems to fit. They need to explain why that method suits the asset, the available data and the purpose of the valuation. That logic should run through the engagement terms, working papers and the final report ^[2]. In practice, method selection now needs a clear audit trail.

If more than one method could work, the valuer must record why one was picked over the others. The same discipline now extends to valuation models too, which the next standard deals with directly.

3. Separate guidance on valuation models, including DCF and statistical tools

VPS 3 deals with choosing the method. VPS 5 deals with the model used to put that method into practice. In the 2025 Red Book, valuation models now sit under their own mandatory standard, separate from valuation approaches and methods ^[1][2].

That split matters. More valuations now depend on DCF, statistical tools, AI and AVMs.

A valuation model is the quantitative tool used to apply a valuation method, either fully or in part. So VPS 5 covers the tool used to carry out the chosen method, whether that means an explicit DCF, an all-risks capitalisation model or a statistical tool ^[7].

That said, the model doesn't make the judgement call on its own. The valuer still does. AI and AVM outputs only count as a written valuation when the valuer applies professional judgement ^[2]. As Ben Elder FRICS put it:

"The standards also underline that these [AI and AVMs] should be used responsibly and that their output will only be regarded as the provision of a written valuation if the valuer has also applied their professional judgement to it." ^[2]

For complex or proprietary models, surveyors need to record the data sources and inputs used, as well as the validation steps taken to show the model is fit for the valuation purpose ^[2]. Under VPS 6, the valuation report must also state which model was used, so there is a clear audit trail for review and reporting ^[2].

That, in turn, points to where the next Red Book update is heading: tighter treatment of ESG, data and reporting inputs.

4. ESG factors now require clearer and more consistent treatment

The other big shift is ESG. It now needs clear, consistent treatment across the whole valuation process. In plain terms, ESG is no longer optional in valuation work where it could affect value or marketability.

As Ben Elder, Head of Professional Practice – Valuation and Investment Advisory, RICS, put it:

"For the first time, Red Book Global Standards include mandatory requirements for the consideration of ESG at every stage of the valuation process, from inspection and investigation to recording and reporting." ^[2]

The updated VPGA 8 now covers all three ESG pillars - Environmental, Social, and Governance - for the first time ^[2]. That means surveyors need to identify and record major ESG factors at each stage: instruction, inspection, and the final report. The result is clearer ESG data, direct stranded-asset analysis, and full coverage of all three ESG pillars ^[2].

That same approach now runs through financial reporting valuations as well. For this work, VPGA 1 now aligns with IFRS S1 and S2 ^[2][3]. The standards also draw a firm line between valuation work and ESG advisory work. Assessing how ESG affects value sits inside the valuation assignment; giving advice on how to improve ESG performance is treated as a separate service ^[8].

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5. Stronger data quality, source transparency and confidentiality requirements

The 2025 edition turns data quality, source transparency and confidentiality into straight compliance matters. The updated VPS 4 now covers Inspections, Investigations and Records ^[2]. In practice, that means surveyors need a working file with enough detail for another valuer to retrace the comparables used and the adjustments made ^[6].

VPS 6 now says valuation reports must set out the main data sources and inputs used to reach the final view ^[2]. So this is no longer a nice extra in a report. It is now a required part of reporting.

The same standard now applies to AI and AVM use. If AI or AVMs are used, valuers must record how those tools were used and protect data rights and confidentiality ^[2][4]. That means working files, evidence schedules and report templates all need to show these disclosures clearly.

Those record-keeping rules feed straight into the tighter AI and AVM oversight covered in the next update.

6. Tighter expectations for AI, AVMs and technology oversight

AVMs are now used across UK lending, and VPS 5 deals with them directly through a standard for valuation models. The message is pretty plain: tech can help with valuation work, but it does not replace professional judgement.

An AVM result is not a Red Book valuation unless the valuer applies professional judgement and takes responsibility for the outcome.

VPS 5 also sets a higher bar for how valuers use models. They need to understand how the model works, check the inputs and outputs, and keep a record of the model's purpose, testing, validation and limits. Firms also need clear rules on when a physical inspection is needed, rather than leaning only on automated data.

There’s another layer here too. A separate RICS standard on responsible AI, which becomes mandatory from 9 March 2026, adds governance duties on top of VPS 5. Firms must keep risk registers for AI tools, put responsible use policies in place, and carry out procurement due diligence on AI suppliers ^[9][10]. For high-volume work, firms must also log randomised checks so they can show that oversight is still happening in day-to-day practice.

That matters because these controls now sit alongside the UK Supplement’s tighter professional and rotation rules. In short, firms can’t treat AI as a black box and hope for the best.

Where AI tools are used, make sure they pick up ESG inputs. If they don’t, any manual ESG review should be recorded separately. In practice, firms need auditable controls for every tech-assisted valuation.

7. UK Supplement changes, rotation rules and tighter professional standards

The UK National Supplement came into force on 1 May 2024 and brought in stricter governance rules ^[5][11].

Under UK VPS 3.3, a responsible valuer can stay on the same asset for up to five years. The valuation firm can stay involved for up to ten years. After that, both must stand down for three years before they can be appointed again. One point catches people out: the rotation clock works retrospectively, so any time spent on the asset before 1 May 2024 already counts towards the limit ^[5][11][12].

There’s also a paperwork point under PS 1. In the written terms of engagement, valuers must state that the period for which the firm has valued the asset does not go beyond the ten-year cap ^[5].

Feature	New Mandatory Rotation (UK VPS 3.3)
Status	Mandatory for specific UK RPVs
Individual Valuer Limit	5 years (mandatory)
Valuation Firm Limit	10 years (mandatory)
Cooling-off Period	Minimum 3 years
Affected Valuations	RPVs for large companies and entities traded on regulated markets

These rules apply to Regulated Purpose Valuations (RPVs). That includes work for financial reporting, takeovers, mergers and collective investment schemes. Secured lending work, including residential mortgages, is out of scope for now. The same goes for public sector valuations covering local authorities, central government and the NHS. That said, Local Government Pension Schemes have been flagged for likely inclusion around 2028 ^[5].

Rotation is only one part of the shift. The Supplement also tightens how instructions are handled and how records are kept. Under UK VPS 3.4, valuers must ask at instruction stage whether independent directors or audit committee chairs are involved. That helps spot undue influence early ^[11][12]. Under UK VPS 3.5, it is now mandatory to keep a record of all preliminary advice, draft reports and client discussions, creating a full audit trail ^[11][12].

Put simply, the standard is now higher on independence, documentation and oversight.

What these updates mean for UK surveyors and clients

How workflows and compliance checks will need to change

The move from five to six mandatory VPS standards is more than a simple renumbering. Firms need to update internal templates, engagement letters and inspection notes that still point to the old VPS references.

There’s a bigger shift too. ESG checks now need to be built into the whole valuation process, from the first instruction to the final report, instead of being treated as an extra step bolted on at the end. And where a firm uses a complex or proprietary model, including an AVM or AI tool, it needs a clear record of how that model was used. The valuer must also apply professional judgement to the output and document that judgement ^[2][3].

Training needs to move with the rules. Firms should make sure valuers get targeted CPD on VPGA 1 and VPGA 11 ^[2][3].

Those workflow changes shouldn’t stay behind the scenes. They need to show up in the final report.

What clients should expect in a current Red Book valuation report

A current Red Book report should make those process changes easy to spot. The terms of engagement must now state any ESG requirements that matter to the instruction. The report itself must also set out the key data sources, any models used, and the main ESG factors considered ^[2][3].

If a model or AVM has been used, that should be stated plainly. The report should also show that a valuer reviewed the output and applied professional judgement, rather than just accepting the result at face value.

Clients should also check the VPS citations. This is a simple but useful sense-check. If the valuation report section cites VPS 3 instead of VPS 6, that points to an old template still being used ^[2][3].

Finding surveyors who work to current Red Book standards

Clients should only instruct valuers who work to the current edition. Survey Merchant connects property owners and buyers with a nationwide panel of multi-disciplinary surveyors offering Red Book valuations alongside Level 2 HomeBuyer Reports and Level 3 Building Surveys.

Conclusion: the seven changes that matter most

The latest Red Book makes valuations more structured, transparent and easier to defend. Taken together, these seven updates change how valuers pick methods, use models, and record ESG and data. The result is work that is more structured, led by evidence, and easier to support if challenged.

For day-to-day valuation work, the big change is simple: less implied judgement, more explicit and auditable reasoning.

Surveyors now need to:

• update templates
• build ESG checks into workflows
• document model use
• apply the updated UK Supplement rules where needed

Clients, in turn, should expect clear data sources, named models, and clear evidence of the valuer’s professional judgement.

FAQs

Which Red Book update applies to my valuation?

If your valuation takes place on or after 31 January 2025, it must follow the current RICS Valuation – Global Standards, published on 2 December 2024.

These standards apply to all RICS-registered valuers and regulated firms. They also include updated mandatory VPS requirements, along with changes covering ESG data, AI governance and valuation modelling. The UK National Supplement was updated in January 2025 as well.

When do AI or AVMs need extra checks?

Under the 2026 Red Book standards, AI and Automated Valuation Models (AVMs) need closer scrutiny when they materially affect surveying services. If a surveyor uses them, they must record why they were used and test the outputs against market data and professional judgement.

There’s another guardrail too. When a firm’s confidence thresholds are exceeded, a physical inspection is required. Surveyors also need to document how the model works, flag any potential bias, and keep a risk register for cases where outputs may be unreliable.

How can I tell if rotation rules apply?

Rotation rules apply to regulated purpose valuations (RPVs), including fund valuations, under UK VPS 3 governance requirements. They do not apply to secured lending valuations.

When these rules apply, the limits are:

• Five years for an individual responsible valuer
• Five years for a single engagement
• Ten years for a valuation firm

After that, a minimum three-year break is required. There can be exceptions for highly specialised assets.

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