The two titles cause genuine confusion, and getting them mixed up can cost you time and money. If you instruct the wrong professional, you may receive a useful report but still not have the document your local authority or mortgage lender actually needs.

In short: a structural engineer designs structural elements and produces the signed calculations required by Building Control. A building surveyor with structural experience, sometimes called a structural surveyor, inspects buildings, diagnoses defects, and advises on remediation, but typically cannot produce the engineered calculations that sign off structural work.

What a Structural Engineer Does

A chartered structural engineer is usually a member of the Institution of Structural Engineers (MIStructE or FIStructE) or the Institution of Civil Engineers (MICE), and is normally registered as a Chartered Engineer (CEng) with the Engineering Council.1 Their core work is:

  • Designing beams, columns, lintels, and foundations
  • Producing structural calculations demonstrating compliance with Eurocodes (EC0, EC1, EC3, EC5, EC7 etc.)
  • Issuing structural drawings and specifications for a contractor to build from
  • Providing the calculations and drawings that Building Control checks before giving Building Regulations approval
  • Reviewing and approving RSJ/steel beam sizes for wall removals
  • Providing structural surveys after subsidence, flood damage, or suspected defects

When you knock down an internal wall, insert a steel, extend, or convert a loft, you will almost certainly need a structural engineer to produce calculations. Building Control will not accept an inspection report in place of structural calculations for these works.2

What a Building Surveyor Does (and What “Structural Surveyor” Actually Means)

The title “structural surveyor” is not a protected or regulated designation in the UK. Even for house surveys, RICS notes that any surveyor can carry out a property inspection, although only an RICS member may complete an RICS Home Survey report.3 What it usually refers to is a chartered building surveyor (MRICS, building surveying pathway) who specialises in structural defects, or a chartered building engineer (MCABE).

Their core work is:

  • Level 2 and Level 3 RICS home surveys (formerly HomeBuyer Report and Building Survey)3
  • Defect diagnosis: damp, cracking, subsidence, decay, failed roofing
  • Preparing schedules of condition and schedules of dilapidations
  • Expert witness reports for property disputes
  • Party wall awards

A building surveyor is the right person when you want to understand the condition of a structure and what remediation is needed. They are not the right person when you want to design a structural change.

Overlap Does Exist

Some chartered building surveyors have additional structural engineering qualifications and can perform both roles. Always ask specifically whether they can produce structural calculations that will satisfy Building Control before instructing them.

When You Need Which Professional

SituationWho to instruct
Pre-purchase survey on a propertyRICS-chartered building surveyor (Level 2 or 3)
Removing an internal wall / inserting a steelStructural engineer (for calculations + drawings)
Cracking in walls, cause unknownEither; building surveyor often leads, structural engineer if underpinning is needed
Loft conversion structural designStructural engineer
House extension foundation designStructural engineer
Flat roof replacement (standard)Building surveyor or specialist roofing contractor
Party wall disputeRICS party wall surveyor (specialist sub-discipline)
Subsidence / heave claimBuilding surveyor initially; structural engineer if underpinning required
Structural warranty inspection (new build)Structural engineer or a registered building control approver such as NHBC
Damp diagnosisBuilding surveyor or independent damp specialist

Qualifications to Check

When instructing either professional, verify membership of the relevant body:

Structural engineer:

  • MIStructE / FIStructE (Institution of Structural Engineers), gold standard for structural work1
  • MICE / FICE (Institution of Civil Engineers) with structural specialism
  • CEng status confirms chartered engineer grade

Building surveyor:

  • MRICS / FRICS (Royal Institution of Chartered Surveyors), building surveying pathway4
  • MCABE (Chartered Association of Building Engineers)
  • CIOB membership (Chartered Institute of Building), more common in project management roles

Both types of professional should hold professional indemnity (PI) insurance; RICS says its qualified members hold appropriate cover.3 Ask for evidence of cover before signing an appointment letter, especially for structural engineer work where liability follows the calculations.

Typical Costs in 2026

Structural engineer fees:

ServiceTypical fee range
Single steel beam calculation (wall removal)£350–£700
Loft conversion structural package£800–£1,8005
Extension structural design (small)£900–£2,000
Structural survey / condition report£400–£1,000
Underpinning design£1,500–£5,000+

Building surveyor fees:

ServiceTypical fee range
RICS Level 2 Survey£400–£700 (depends on property size)
RICS Level 3 Survey£600–£1,200
Structural defect report£300–£700
Party wall award (surveyor-only)£700–£1,500
Schedule of dilapidations£500–£2,000

Day rates in 2026: structural engineers typically charge £550–£950 per day for site attendance; RICS surveyors typically charge £400–£750 per day.

The Party Wall Act: Who Handles It?

The Party Wall etc. Act 1996 creates a specific role for a party wall surveyor. This is not a separate professional credential: the Act defines a surveyor as any person who is not a party to the matter and is appointed or selected under section 10, so the role can be carried out by a structural engineer, a building surveyor or another professional.6 In practice most party wall matters are handled by surveyors who specialise in this area.

If your loft conversion or extension triggers the Party Wall Act (for example cutting into a party wall to take a beam, or excavating within 3 metres, or in some cases 6 metres, of a neighbour’s building), you’ll usually need both: a structural engineer for the design calculations and a party wall surveyor to prepare the notices and, if your neighbour does not consent, the award.78

Red Flags When Instructing

  • No PI insurance: non-negotiable for structural work
  • Calculating verbally: structural calculations must be written, signed, and submitted. Anyone who says they’ll “tell you what size beam to use” without producing calculations is not providing a Building Regulations-valid service.
  • Generic reports: a structural report on your specific property should reference your specific property, address, date of inspection, photographs, specific defects seen
  • Unregistered persons: check IStructE and RICS registers online before instructing

Building Regulations and Sign-Off

For most structural alterations in England (wall removals, new openings, extensions, loft conversions), you need:

  1. A Building Regulations application (Full Plans or Building Notice)
  2. Structural calculations from a structural engineer (usually chartered) submitted to Building Control
  3. Inspection by the BCO at key stages (foundations, steelwork, completion)
  4. A Completion Certificate issued by the local authority, or a final certificate from a registered building control approver (the private route, renamed from “approved inspector” in April 2024)910

A building surveyor’s condition report does not substitute for any of the above. If a contractor tells you a structural survey from a surveyor is sufficient to satisfy Building Control for load-bearing work, that is incorrect.

References (10)

Figures in this note were checked against the sources below on 2 October 2026. Superscript numbers in the text point to them. Every source the site cites, by topic.

  1. 1technicalstrongThe Institution of Structural Engineers, guidance.RN-A313C9IStructE's membership page. It confirms the Chartered Member (MIStructE) and Fellow (FIStructE) grades of the Institution of Structural Engineers.
  2. 2technicalvery strongPlanning Portal, guidance.RN-BAZDDMThe Planning Portal's answer on moving an internal load-bearing wall: planning permission is generally not needed for internal alterations, but building regulations approval is, and the wall's structural role is exactly why. The clean statement of the distinction people get wrong, that no planning permission does not mean no approval needed.
  3. 3technicalstrongRoyal Institution of Chartered Surveyors, guidance.RN-FNUWS8RICS's consumer guide to home surveys: the Level 1, 2 and 3 survey types, what each includes, and what they cost. The professional body that defines the levels, so this is the authority for what a Level 3 survey actually commits the surveyor to, as distinct from a lender's valuation, which is not a survey at all.
  4. 4technicalstrongRoyal Institution of Chartered Surveyors.RN-84LISRRICS lists five member grades: Associate Member (AssocRICS) for those qualifying on work-based experience; Chartered Member (MRICS), reachable with a bachelor's degree, an approved professional qualification, or 10 years of relevant experience, and awarded after the Assessment of Professional Competence; RICS Fellow (FRICS), described as a mark of distinction and an international measure of excellence; RICS Student membership; and Retired membership. Only members and fellows may describe themselves as chartered and use MRICS or FRICS. The clean citation for any note that names a surveyor's post-nominals, including quantity surveyor, building surveyor and valuation notes.
  5. 5costsupplier figureThe Beam Doctor.RN-DVQUAAA price, true at 2026-06. A chartered structural engineering practice in West Yorkshire publishing its own fee schedule for domestic work, priced by scope rather than by the hour: steel beam and RSJ calculations from 295 pounds and a two or three beam bundle from 495, both desk based from drawings and photographs with any site visit charged separately; a written structural report on one concern from 450; extension design from 650, with larger or multi-storey projects at 800 to 1500 and a bundle of extension design plus one half day site visit at 995; loft conversion design from 450 for a straightforward loft, 1200 to 1800 for larger dormers, hip to gable conversions and trussed roofs that have to be replaced, and 1800 to 2200 for mansards; chimney breast removal from 395 single storey, 550 multi-storey or party wall stacks, 695 for a full stack and 450 for retrospective certification; retaining wall design banded by retained height from 650 to 1400; drainage and build-over support from 275, with build-over or build-near agreement support from 495; and a new roof structure from 600. Site attendance is a separate three tier schedule: 250 for up to two hours, 395 for a half day and 595 for a full day, free of travel charge within 10 road miles of Huddersfield, 45 pounds flat to 25 miles and 45p a mile plus 45 pounds an hour beyond it, with 30 per cent added out of hours. All prices are gross because the practice is not VAT registered. It is one practice's price list, not a market average, and the desk based fees carry no travel so they do not vary with where the house is.
  6. 6technicalvery strongThe National Archives, guidance.RN-90H0DEThe Act's interpretation section. It defines a party wall surveyor by appointment under section 10, not by any professional qualification, so engineers and building surveyors can both act.
  7. 7technicalvery strongThe National Archives (legislation.gov.uk), legislation.RN-QBUTY2The exact wording of the two excavation triggers that decide whether a basement or a deep foundation needs a party wall notice, worth quoting rather than paraphrasing. Section 6(1) applies where the building owner proposes to excavate, or excavate for and erect a building or structure, within a distance of 3 metres measured horizontally from any part of a building or structure of an adjoining owner, and the excavation will within those 3 metres extend to a lower level than the level of the bottom of the neighbour's foundations. Section 6(2) applies within 6 metres measured horizontally where the work will within those 6 metres meet a plane drawn downwards in the direction of the excavation at an angle of 45 degrees to the horizontal. Section 6(5) requires the building owner to serve notice on the adjoining owner at least one month before beginning to excavate. Section 6(7) provides that if the adjoining owner does not serve a notice indicating consent within 14 days, they are deemed to have dissented and a dispute has arisen, which is what triggers the surveyor and award process.
  8. 8technicalvery strongThe National Archives (legislation.gov.uk), legislation.RN-WKDENHSection 2(2) lists the building owner's rights over a party structure: (a) underpin, thicken or raise; (b) make good, repair or rebuild a defective party structure; (c) to (e) demolish and rebuild non-conforming partitions, connected buildings and party structures of insufficient strength or height; (f) to cut into a party structure for any purpose, which may include inserting a damp proof course; (g) to cut away a footing, projecting chimney breast, jamb, flue or other projection to enable a wall to be built; (h) to cut away overhanging parts of an adjoining building; (j) insert flashings; (k) execute incidental works; (l) raise or rebuild a party fence wall; (m) reduce wall heights; (n) expose a previously enclosed party wall. Paragraph (f) is the one that catches chasing or breaking through a shared wall for pipework, which makes it party wall work requiring a party structure notice.
  9. 9technicalvery strongThe National Archives, guidance.RN-PJNWVLThe regulations that brought in registered building control approvers in England. They came into force on 6 April 2024, which dates the change from approved inspectors.
  10. 10technicalvery strongThe National Archives (legislation.gov.uk).RN-2H8K8OPart 3 of the Building Safety Act 2022, building control approvers and building inspectors. The statutory basis for the regime that replaced approved inspectors, and the reason a private inspector must now be registered with the Building Safety Regulator.

  1. Membership, The Institution of Structural Engineers, accessed 30 September 2026. istructe.org

  2. Do I need planning permission to move an internal load bearing wall?, Planning Portal, accessed 2 October 2026. interactive.planningportal.co.uk

  3. House surveys UK: the costs, types and benefits of an RICS Home Survey, RICS, accessed 30 September 2026. rics.org

  4. RICS member grades, RICS, accessed 30 September 2026. rics.org

  5. Steel Beam & RSJ Calculations UK, The Beam Doctor, accessed 21 September 2026. Priced at 2026-06, so no calibration is needed. thebeamdoctor.co.uk

  6. Party Wall etc. Act 1996, section 20: Interpretation, The National Archives, accessed 30 September 2026. legislation.gov.uk

  7. Party Wall etc. Act 1996, section 6: Adjacent excavation and construction, The National Archives, accessed 14 September 2026. legislation.gov.uk

  8. Party Wall etc. Act 1996, section 2: Repair etc. of party wall: rights of owner, The National Archives, accessed 30 September 2026. legislation.gov.uk

  9. The Building (Registered Building Control Approvers etc.) (England) Regulations 2024, The National Archives, accessed 2 October 2026. legislation.gov.uk

  10. Building Safety Act 2022, Part 3: Building control approvers and building inspectors, The National Archives, accessed 30 September 2026. legislation.gov.uk