Measured Building Surveys for Architectural Technicians: Scope Outputs and Common Mistakes
Architectural technicians working with measured building surveys need to specify correctly to avoid costly revisions. Here is what to commission and common mistakes to avoid.
Essential Outputs for Architectural Technicians
| Deliverable | Format | Typical Scale | | --- | --- | --- | | Floor plans | DWG (AutoCAD) | 1:50 or 1:100 | | External elevations | DWG | 1:50 | | Cross-sections | DWG | 1:50 | | Site plan | DWG | 1:200 | | Levels schedule | XLS / CSV | N/A | | Point cloud (optional) | E57 / RCP / RCS | N/A |
Common Mistakes Architectural Technicians Make
| Mistake | Impact | Prevention | | --- | --- | --- | | Not specifying DWG format | Cannot edit drawings | Always specify DWG | | Missing elevations | Planning drawings incomplete | Specify all four sides | | No OS grid datum | Cannot coordinate with other drawings | Require OS National Grid | | Wrong scale for planning | Rejected submission | 1:50 for residential, 1:100 for larger | | Incomplete room schedule | Specification gaps | Include room names, floor areas, heights | | Point cloud only — no drawings | Cannot produce tender drawings | Specify DWG + point cloud |
Survey Accuracy Requirements
| Element | Typical Tolerance | | --- | --- | | Wall positions | ±15mm | | Floor levels | ±10mm | | Window/door openings | ±10mm | | Overall building dimension | ±30mm |
2025 Costs (ex VAT)
| Property Type | Survey Cost | | --- | --- | | 2–3 bed house | £600–£1,200 | | 4–5 bed house | £1,000–£2,000 | | Small commercial | £1,500–£3,000 | | Large commercial | £3,000–£8,000+ |
When to Commission a Measured Building Survey
| Project Stage | Survey Needed? | | --- | --- | | Pre-planning feasibility | Yes — early data | | Detailed design | Yes — full scope | | Planning submission | Yes — drawings required | | Building regulations | Yes — accurate dimensions | | Tender package | Yes — contractor reference |
Questions to Ask Your Surveyor
- Do you survey in OS National Grid?
- What format do you deliver drawings in?
- Do you include floor levels relative to ODN?
- What is your measurement tolerance?
- Can you deliver point cloud data alongside DWG?
- What is your typical turnaround?