Setting Out Engineer for Architects: Working Together Effectively
The relationship between an architect and a setting out engineer is one of the most important in any construction project. The architect designs; the setting out engineer translates those designs into precise physical positions on the ground. Get this relationship right, and the build proceeds smoothly. Get it wrong, and the consequences cascade through every stage of construction.
This guide explains exactly what architects need from a setting out engineer, how to brief them effectively, what drawings to provide, how to manage the relationship throughout the project, and what it costs in 2025.
What a Setting Out Engineer Does for Architects
A setting out engineer translates architectural drawings into precise physical positions on site, ensuring structures are built in the correct location with accurate dimensions and levels. The engineer is the bridge between the design world and the construction world — and their work determines whether what is built matches what was designed.
Key Services Architects Require from a Setting Out Engineer
| Service | Purpose | | --- | --- | | Initial setting out | Mark foundation positions, grid lines, and benchmarks before construction begins | | Verification checks | Confirm alignment and level during construction — before concrete pours, wall construction, and drainage installation | | As-built surveys | Document completed work against the design for handover and adoption | | Quality control | Maintain primary control tolerance of ±3mm, structural element tolerance of ±5mm | | Technical problem-solving | Resolve unexpected site issues quickly — the engineer can check positions and propose solutions | | Liaison | Bridge between the design team and the construction crew — translating design intent into site action |
What Architects Are Responsible For
| Responsibility | Details | | --- | --- | | Providing accurate, coordinated drawings | All dimensions must agree across every drawing — no inconsistencies | | Ensuring drawings are setting-out ready | DWG format, OS coordinates, benchmarks, grid lines — all must be specified | | Specifying tolerances | Positional tolerance (typically ±10mm) and level tolerance (±5mm) must be stated | | Confirming the design is buildable | Before setting out begins, the design must be checked for buildability — not at the setting out stage | | Managing the design team's coordination | All disciplines (architecture, structure, MEP) must be coordinated before drawings are issued |
How to Brief a Setting Out Engineer
Essential Information to Provide in the Brief
| Information | Why It Matters | | --- | --- | | Project scope and programme | The number of visits depends on complexity — a small house needs fewer visits than a multi-unit development | | What needs setting out | Foundations, drainage, columns, walls, external works — specify every element that needs to be set out | | Site access details | Timing, access restrictions, contact person on site — avoid wasted visits due to access issues | | Existing control points and benchmarks | Any established benchmarks or grid lines on site — saves time on site control establishment | | Timeline requirements | Notice period — short-notice visits are available but cost more; plan ahead for best value | | Adoption requirements | If roads or drainage need to be adopted, the as-built data required may be specified by the adopting authority |
Best Practice for Commissioning
| Practice | Why It Helps | | --- | --- | | Contact the engineer a few days in advance | Best availability — setting out engineers are in demand and book up quickly | | Provide CAD drawings before the site visit | Allows the engineer to prepare — review coordinates, plan the control network, identify any issues | | Confirm whether you need ongoing visits or one-off setting out | Programme the visits in advance — avoid the cost and disruption of last-minute additions | | Provide the topographical survey data | OS coordinates and benchmarks are essential for site control — include this with the brief | | Specify tolerances explicitly | The engineer must know what accuracy is required — if you don't specify, they may use a default that is insufficient |
Drawings to Provide to the Setting Out Engineer
Minimum Drawing Requirements
| Drawing Type | Format Required | Why It Matters | | --- | --- | --- | | Topographical survey | DWG + PDF (with station/coordinator information) | OS coordinates and benchmarks for site control | | Plan view (GA plan) | DWG + PDF | Building outline, grid lines, dimensions | | Sections and elevations | DWG or PDF | Floor heights, ceiling levels, roof geometry | | Drainage drawings | DWG or PDF | Pipe routes, invert levels, connection points | | Structural drawings | DWG or PDF | Foundation positions, structural grid, column positions | | Roof plan | DWG or PDF | Roof geometry, ridge and valley positions | | Site plan with levels | DWG + PDF | Boundary, external works, finished levels |
DWG Format: Essential Not Optional
Key point: DWG CAD format is essential for accurate setting out. PDF alone is insufficient. The engineer imports coordinates directly from DWG files — PDFs do not preserve coordinate data with sufficient precision for survey work.
| Why DWG Is Essential | What PDF Cannot Do | | --- | --- | | Coordinate data | PDF does not preserve XYZ coordinates — cannot be used for precise positioning | | Layer organisation | PDF flattens layers — cannot separate grid lines from building lines | | Scalability | PDF scales but loses precision — not suitable for survey-grade accuracy | | Update capability | DWG can be updated if the design changes — PDF is static |
If you only provide PDFs, the setting out engineer will have to extract coordinates manually — which is time-consuming, error-prone, and expensive.
What Must Be on the Drawings
| Element | Why It Is Required | | --- | --- | | Grid lines with coordinates | Engineer's primary reference — every significant position must be on a grid line | | OS coordinates | Building must be tied to Ordnance Survey National Grid — not local coordinates | | Benchmarks with levels | All finished floor levels referenced to a known datum — benchmark must be accessible on site | | Boundary positions | Confirmed against Land Registry — building must be within the legal boundary | | Tolerances stated | Positional tolerance (typically ±10mm) and level tolerance (±5mm) must be specified | | Dimensions on every key position | Every significant position should be dimensioned — not just plotted from a scale | | Consistent dimensions across all drawings | Any discrepancy between drawings will be found on site — at great cost |
The Setting Out Process: What Architects Need to Manage
Before the First Site Visit
| Action | Details | | --- | --- | | Confirm the site is ready | Cleared, accessible, benchmarks visible and protected | | Issue drawings to the engineer | At least 2 working days before the visit — allows preparation | | Confirm the programme of visits | Know how many visits are needed and when — plan the construction programme accordingly | | Brief the contractor | The contractor must know what setting out is being done and when — and must not disturb control points | | Check the drawings for consistency | Every dimension must agree across every drawing — this is the architect's responsibility |
At Key Construction Stages
| Stage | What to Check | | --- | --- | | Before foundation concrete is poured | Verify foundation positions, dimensions, and reinforcement cover | | Before drainage is installed | Verify pipe routes, gradients, and invert levels | | Before walls are built above ground floor | Verify wall positions, alignment, and verticality | | Before floor slab is poured | Verify level and thickness of slab | | Before external works | Verify boundary positions, levels, and hard landscaping |
After Each Site Visit
| What to Receive | Why It Matters | | --- | --- | | Written setting out report | Documents all control points, coordinates, benchmarks, and levels | | Marked positions on site | Grid lines, foundation positions, drainage positions physically marked | | Any deviations from the design | Errors identified immediately — before they become expensive to fix | | Recommendations for next steps | Clear guidance on what needs to happen before the next visit |
Typical Setting Out Programme for an Architect-Led Project
RIBA Stage 4: Technical Design
| Action | Timing | | --- | --- | | Confirm setting out requirements | Early in Stage 4 — as part of the technical design programme | | Commission the setting out engineer | Before groundworks begin — book early to secure availability | | Prepare setting-out-ready drawings | DWG format, OS coordinates, benchmarks — all must be confirmed before issue | | Brief the contractor on control points | Before groundworks — contractor must know not to disturb control points | | Plan the programme of visits | Match setting out visits to the construction programme |
RIBA Stage 5: Construction
| Visit | What Happens | Timing | | --- | --- | --- | | 1. Initial site control | Establish control points and benchmarks | Before groundworks | | 2. Foundation setting out | Mark foundation positions, grid lines | Before foundation excavation | | 3. Foundation verification | Check positions before concrete pour | Before concrete pour | | 4. Wall and superstructure | Mark wall positions, structural elements | Before wall construction | | 5. Drainage setting out | Mark drainage positions and levels | Before drainage installation | | 6. Level checks | Verify floor levels, threshold levels | Before floor slab pour | | 7. External works | Mark boundaries, hard landscaping, finished levels | Before external works | | 8. As-built survey | Verify positions and levels at completion | Before handover |
Setting Out Engineer Costs 2025
Day Rates and Hourly Rates
| Service Type | Cost Range (ex VAT) | | --- | --- | | Day rate (self-employed setting out engineer) | £250–£400 per day | | Day rate (company rate) | £300–£500 per day | | London and South East England | £350–£600 per day | | Hourly rate | Approximately £32 per hour | | Half-day attendance | £250–£350 + VAT | | Short-notice attendance | Premium rates apply — book in advance for best value |
What Affects the Cost?
| Factor | Impact | | --- | --- | | Project complexity | Complex geometry (curves, raking, precast) requires more time | | Number of visits | More visits = higher total cost — plan the programme to minimise visits | | Location | London and South East command higher rates — budget accordingly | | Control point establishment | Sites without existing benchmarks require more setup time | | Adoption requirements | As-built surveys for adoption add to the scope | | Short-notice availability | Last-minute bookings cost more — plan ahead |
Typical Total Setting Out Costs by Project Type
| Project Type | Total Setting Out Cost (ex VAT) | | --- | --- | | Small house extension | £400–£800 | | New build house | £600–£1,500 | | Medium residential development (4–10 units) | £2,000–£5,000 | | Large residential development (10+ units) | £5,000–£15,000+ | | Small commercial building | £1,500–£3,000 | | Large commercial building | £5,000–£20,000+ |
Common Problems and How to Avoid Them
Problem 1: Inconsistent Dimensions Across Drawings
| What Happens | The Fix | | --- | --- | | Site finds conflicting information — work stops | Before issuing drawings, check every dimension agrees across every drawing. Use a systematic checklist. |
Problem 2: No OS Coordinates on the Drawings
| What Happens | The Fix | | --- | --- | | Building is set out in local coordinates — doesn't match the survey or the boundary | Ensure all drawings use OS National Grid coordinates — not local references. The topographical survey provides these. |
Problem 3: Benchmarks Not Accessible
| What Happens | The Fix | | --- | --- | | Setting out engineer arrives on site — benchmarks are under a concrete slab or inside a locked building | Confirm benchmarks are visible, accessible, and protected before the site visit. Include benchmark locations in the brief. |
Problem 4: Contractor Disturbs Control Points
| What Happens | The Fix | | --- | --- | | Site traffic moves pegs and markers — setting out has to be re-done | Brief the contractor before groundworks: control points must not be disturbed. Mark control points visibly. |
Problem 5: Setting Out Reveals Design Errors
| What Happens | The Fix | | --- | --- | | Engineer identifies a discrepancy between the design and the site — design must be revised | This is actually good — setting out catches design errors before they become expensive. Plan time for design revisions if the architect has any concerns about the design. |
What to Include in Your Architectural Appointment Documents
Setting Out Specification
| Element | What to Include | | --- | --- | | Requirement for a qualified setting out engineer | Specify professional membership (RICS, CICES, or equivalent) | | Drawing requirements | DWG format, OS coordinates, benchmarks, tolerances — all specified | | Programme of visits | Match setting out visits to the construction programme | | Reporting requirements | Written setting out report after every visit | | Adoption requirements | If roads or drainage need to be adopted — specify what as-built data is required | | Budget | Setting out costs included in the project budget |
Coordination with Other Consultants
| Consultant | What to Coordinate | | --- | --- | | Structural engineer | Foundation positions, structural grid, column positions — all must be consistent | | MEP engineer | Drainage positions, service entry points — all must be coordinated with the setting out | | Civil engineer | Road geometry, drainage levels, adoptable drainage — all must be set out correctly | | Quantity surveyor | Setting out costs — include in the bills of quantities |
Frequently Asked Questions
Q: Should I specify the setting out engineer in my appointment documents?
Yes — it is good practice to include a setting out specification in your appointment documents. This ensures the client understands the requirement and budgets for it. It also establishes the standard of service you expect — professional membership, written reports, OS coordinates, and so on.
Q: Can the contractor's own staff do the setting out?
Unless the contractor has a qualified surveyor on staff with survey-grade equipment, this is not recommended. A contractor's staff may have basic knowledge of measuring, but they rarely have the training, equipment, or experience for precision setting out. A professional setting out engineer provides certified accuracy — contractor measuring does not.
Q: What happens if the setting out engineer finds the design doesn't work on site?
The engineer will flag the discrepancy and advise you. The design must be revised before construction can proceed. This is precisely why setting out is valuable — it catches design errors before they become expensive construction problems. Build time into the programme for potential design revisions.
Q: How do I know the setting out is accurate?
The setting out engineer provides a written report after every visit — documenting all control points, coordinates, benchmarks, and measurements. This is your evidence that the setting out was done correctly. You should also receive an as-built survey at the end of the project confirming the building was built in the correct position and at the correct level.
Q: Do I need to provide the topographical survey data to the setting out engineer?
Yes — the topographical survey provides the OS coordinates and benchmarks that the setting out engineer uses to establish site control. Commission the topographical survey at the feasibility stage and pass the data to the setting out engineer when you brief them.
Q: What tolerance should I specify on the drawings?
For typical construction, a positional tolerance of ±10mm and a level tolerance of ±5mm is standard. For precision construction (structural steel, precast concrete, curtain walling), a tighter tolerance may be required — specify this explicitly on the drawings. If no tolerance is stated, the default used may not be sufficient for your project.
Q: How many setting out visits do I need for a typical house extension?
For a typical house extension, 2–4 visits are typical: initial setting out (foundations and grid), verification before concrete pour, drainage setting out, and a final as-built check. The exact number depends on the complexity of the project — a simple single-storey extension may need fewer visits; a two-storey extension with a basement may need more.
Q: Can the setting out engineer work from my BIM model?
Yes — many setting out engineers can work from BIM models in Revit or IFC format. However, confirm this with the engineer when commissioning — not all engineers have BIM capability. If the project involves BIM coordination, specify the required output formats in the brief.
Q: Who do I contact if there is a dispute about positions or levels on site?
The setting out engineer's written report is your evidence. If there is a dispute between the architect's drawings and the contractor's setting out, the engineer can re-verify the positions and provide certified data. Always insist on written setting out reports — they protect all parties in the event of a dispute.
Q: My project is small — do I really need a formal setting out report?
Yes — a written setting out report is your evidence that the setting out was done correctly, even on a small project. If there is ever a dispute about positions or levels, the report is your proof. Without a written report, there is no evidence of what was set out and when.