RICS Building Survey Types: Level 1, Level 2 and Level 3 — Which Survey Do You Need Before Buying a London Property?

**The RICS Home Survey Standard**:

The RICS Home Survey Standard (effective from March 2021) replaced the previous suite of survey products with a standardised three-level framework. All RICS-regulated surveyors in England must use this framework and provide surveys that conform to the standard.

The three levels are:

**RICS Level 1 — Condition Report**:

• The most basic RICS survey — designed for conventional modern properties in apparently good condition. The Level 1 report:
• •Records the condition of the property using a traffic light rating system (Condition Rating 1 = no repair currently required; CR 2 = defects that need repairing or replacing but not considered urgent; CR 3 = defects that are serious or need to be repaired urgently)
• •Does not provide advice on repairs
• •Does not include a valuation or reinstatement cost assessment
• •Is a visual inspection only — the surveyor does not probe, test, or open up concealed areas
• •Covers the visible and accessible elements of the building

Level 1 is intended for: newly built properties (where the builder's warranty typically covers defects for the first 2–10 years); standard modern construction properties (post-1980, no unusual construction, no apparent defects); properties where the buyer has already identified the condition risks and wants only a basic written record. Level 1 is NOT suitable for Victorian or Edwardian properties — it will not adequately identify the kinds of defects common in older London properties.

**RICS Level 2 — HomeBuyer Report (Survey)**:

• The standard RICS survey for most mainstream London properties in reasonable condition — conventional construction, no obvious major defects. The Level 2 report:
• •Uses the same CR 1/2/3 traffic light rating as Level 1 — but with much more detail
• •Includes advice on defects, their significance, and the recommended course of action
• •Comments on construction materials, services, grounds, and environmental matters
• •Identifies urgent defects (CR 3) that require immediate attention and legal issues that require investigation
• •Is a visual inspection only — the surveyor does not probe, open up, or destructively test
• •Can include a market valuation and/or reinstatement cost assessment (as optional additions)
• •Comments on defects visible and accessible at the time of inspection

Level 2 is intended for: conventional construction properties in reasonable order; properties where no significant defects are apparent from a visual inspection; most London 1930s–1970s properties in outer London that are not in a state of major disrepair. Level 2 is the minimum recommended standard for most London residential purchases.

Level 2 limitations: the visual-only constraint is significant. A Level 2 survey will not identify defects concealed by decoration, concealed by floor coverings, or below the surface of the structure. In practice, this means that a Level 2 survey on a poorly renovated London Victorian terrace (where previous owners have decorated over damp, patched over structural cracks, or covered defective floors with new flooring) may miss significant defects. Where there are any visible signs of concern — cracks, damp, settlement, poor condition finishes — upgrading to Level 3 is appropriate.

**RICS Level 3 — Building Survey (formerly the Full Structural Survey)**:

• The most comprehensive RICS survey — appropriate for older, larger, more complex, or dilapidated properties. The Level 3 report:
• •Provides a detailed description of the construction and condition of all accessible elements
• •Describes the form of construction and identifies any unusual or non-standard elements
• •Advises on defects, their cause, their significance, and the remediation options
• •Includes a view on the most likely cause of defects (not just listing them)
• •Covers concealed areas where they can be safely accessed without causing damage
• •The surveyor will typically lift accessible floor coverings, open accessible roof hatches, and probe suspected areas of dampness or timber decay
• •Includes advice on repairs and maintenance

Level 3 is intended for: pre-1930 properties (Victorian, Edwardian, Regency, Georgian); properties in significant disrepair; properties where renovation works are planned; properties with unusual construction (timber frame; thatched roof; concrete frame; listed building); properties where the buyer has identified visible concerns during viewing; any property the buyer plans to extend or significantly refurbish.

For the vast majority of inner London Victorian terrace purchases, Level 3 is the correct choice. The higher cost of a Level 3 survey (£600–£1,500 versus £400–£800 for Level 2) is trivial relative to the risk of purchasing a Victorian terrace with unknown structural or damp defects.

**Cost comparison (London, 2025)**:

| Survey type | Typical cost range (London) | Property suitability | |---|---|---| | RICS Level 1 Condition Report | £250–£500 | New build / very modern conventional property | | RICS Level 2 HomeBuyer Report | £400–£800 | Post-1930, conventional, no visible defects | | RICS Level 3 Building Survey | £600–£1,500 | Pre-1930, dilapidated, unusual construction, renovation planned | | Valuation only (Lender's valuation) | £150–£400 | Mortgage requirement — NOT a survey |

Note: the lender's mortgage valuation is NOT a survey — it assesses the property's value for mortgage purposes and does not provide the buyer with information about the property's condition. It is not a substitute for any level of survey.

**Why Victorian properties need a Level 3 survey**:

• London Victorian properties (built 1840–1910) are typically 115–135 years old. During that time they have been through:
• •Victorian-era construction using lime mortar and hand-made bricks (with a very different performance from modern construction)
• •Numerous periods of repair, alteration, and partial renovation
• •Potential previous bomb damage and post-war patching
• •Conversion from gas lighting and coal fires to modern electrical and gas systems
• •Extension and alteration by multiple previous owners
• •Potentially decades of deferred maintenance under various ownership
• •In many cases, multiple periods of damp and moisture ingress

The result is that virtually every Victorian terrace in London has at least some defects — the question is whether they are minor (manageable with routine maintenance), significant (requiring repair at some cost), or serious (affecting structural integrity or causing ongoing damage).

**Common defects found in London Victorian terrace Level 3 surveys**:

*1. Damp (rising damp, penetrating damp, condensation)*: The most common condition rating 2 or 3 issue in London Victorian terraces. Rising damp (moisture from the ground rising through capillary action in the wall) was addressed in Victorian construction by the installation of slate damp proof courses at low level — many of which have now failed. Penetrating damp occurs through defective mortar, cracked render, failed window sealants, or blocked gutters. The surveyor uses a moisture meter to identify elevated moisture levels in walls, and will comment on the cause (rising vs. penetrating vs. condensation) and recommend investigation. Remediation costs vary significantly: re-pointing or gutter repair (£500–£3,000); chemical DPC injection for rising damp (£1,000–£3,000); full damp remediation and replastering (£3,000–£8,000+).

*2. Structural movement (settlement, subsidence, heave)*: London is predominantly founded on London Clay — an expansive clay that shrinks in dry conditions (causing settlement) and swells when rewetted (causing heave). Near trees, London Clay movement is amplified: tree roots extract moisture from the clay during the growing season (causing seasonal settlement/cracking) and the clay swells when the tree is removed (causing heave). The surveyor identifies structural cracks (noting their width, pattern, and likely cause) and recommends specialist investigation where serious movement is suspected. Tree-related subsidence repair (with underpinning where required): £15,000–£50,000+. The surveyor cannot determine whether movement is historic (long since stabilised) or ongoing — a specialist report from a structural engineer or geotechnical engineer is required for properties where movement is suspected.

*3. Roof covering condition (pitched and flat roofs)*: Victorian London terraces have pitched roofs (typically Welsh slate, replaced over time with concrete or clay tiles in many cases) and flat roofs over rear back additions (frequently reached end of life on older constructions). The surveyor inspects the roof covering from ground level and from an accessible loft hatch (or using binoculars). Common issues: slipped or missing slates; bridged valleys; defective lead flashings; end-of-life felt flat roof on back addition. Pitched roof re-covering cost: £4,000–£12,000. Flat roof replacement: £1,500–£4,000 for a typical back addition.

*4. Timber defects (roof timbers, floor joists, joinery)*: Victorian roof structures (cut and pitched rafters in softwood) and floor structures (softwood joists) are susceptible to wet rot, dry rot, and woodworm where moisture levels are elevated. The surveyor probes suspect timbers and identifies areas of decay. Localised rot repair: £500–£2,000. Dry rot remediation (which requires full removal of affected material, sterilisation, and replacement): £3,000–£15,000+. The Level 3 survey will identify suspected timber decay — quantification requires opening up.

*5. Services condition (electrics, plumbing, gas)*: A building surveyor cannot test services (electrical testing requires a Part P registered electrician; gas testing requires a Gas Safe registered engineer). However, the surveyor will note the apparent age and condition of visible electrical installations, pipework, and heating systems, and recommend specialist testing where the visible condition suggests concerns. Old wiring systems (pre-1960s rubber-insulated wiring; aluminium wiring; old consumer units without RCD protection) and lead pipework should be flagged in any Level 3 survey of a Victorian property.

*6. Chimney condition*: Victorian London terraces have extensive chimney stacks — serving original fireplaces on each floor. Many chimneys are no longer used but remain structurally part of the building (supporting party walls in many cases). Defective mortar in chimney stacks is extremely common — the chimney is fully exposed to weathering and receives little maintenance. Loose chimney pots, spalled or cracked chimney flaunching, and defective stack pointing are common findings. Re-pointing a chimney stack: £800–£2,500. Full chimney rebuild: £2,000–£5,000.

**How a building survey informs a renovation or extension project**:

For a London homeowner planning to extend or refurbish a property they are about to buy (or have recently bought), a Level 3 building survey is not only useful for understanding the current condition — it should be read in conjunction with the planned works to identify:

*1. Pre-existing defects that must be addressed before or during the works*:

• Building Regulations require that extension and alteration works do not make existing conditions worse — and in some cases, that certain defects in the existing building are remediated as part of the works. For example:
• •Rising damp in the existing house should be investigated and remediated before an extension is added — otherwise the extension may bridge the existing DPC and cause the damp to spread into the new area
• •Defective drainage should be investigated before extension foundations are excavated — a broken drain discovered in the foundation trench after excavation is expensive to fix, and a drainage survey before the build starts allows it to be planned for
• •Structural movement should be investigated before the planning application is submitted — a Building Control application for a rear extension on a property with suspected subsidence will require a structural engineer's assessment of the movement and the proposed foundation solution

*2. Construction type information relevant to the project*:

• The Level 3 survey identifies:
• •The existing wall construction (solid brick; cavity; concrete frame; timber frame) — essential information for designing the extension junction detail and the insulation strategy
• •The existing floor construction (suspended timber; solid concrete; beam-and-block) — relevant to connecting the extension floor to the existing floor
• •Roof structure type (cut and pitched; trussed rafter) — trussed rafters cannot be cut to form a loft conversion without specialist structural work
• •Any structural or non-structural chimney breasts that may be affected by the planned works

*3. Party wall and boundary information*:

A good Level 3 survey identifies visible evidence of party wall conditions and boundary matters. A surveyor who identifies a significant lean or crack in the party wall, a boundary wall in imminent risk of collapse, or any other condition that would be relevant to a party wall notice, will flag this in the report.

**How to instruct a building survey for a London renovation project**:

• When commissioning a Level 3 building survey on a property you plan to extend or refurbish, include in your instruction to the surveyor:
• •That you are planning to carry out works (specify the type: rear extension; loft conversion; full refurbishment)
• •That you want the surveyor to specifically comment on whether the property is structurally suitable for the planned works
• •Whether you want them to comment on the potential cost of any defects identified
• •Whether you want a reinstatement cost assessment (for insurance purposes — different from market value)

A skilled RICS Level 3 surveyor will then tailor their report to your specific needs — flagging not just the current condition of the roof, but whether the roof structure type is suitable for a loft conversion; not just the damp in the rear wall, but whether it should be remediated before an extension is added.

**Specialist reports that a Level 3 survey may trigger**:

| Finding in Level 3 survey | Recommended specialist report | |---|---| | Structural cracking / suspected movement | Structural engineer's investigation and monitoring | | Tree nearby + visible cracking | Arboricultural survey + structural engineer | | Suspected dry rot or significant wet rot | Timber and damp specialist survey | | Old wiring / no RCD protection | Electrical Installation Condition Report (EICR) | | Old lead pipework | Plumbing survey / water quality test | | Pre-1980 construction | Asbestos survey (if planning works) | | Flat roof near end of life | Roofing contractor's report and quotation |

These specialist reports cost additional money (typically £200–£600 each) but provide the buyer with a much more complete picture before exchange — and can be used as negotiation evidence if they reveal significant defects.