London Borough Survey Considerations
| Factor | Detail | | --- | --- | | Planning | Detailed metric requirements | | Property type | Victorian to contemporary | | Conservation | Multiple zones |
2025 Measured Survey Costs (ex VAT)
| Property | Survey Cost | | --- | --- | | 2–3 bed | £400–£600 | | 4+ bed | £500–£800 | | Commercial | £800–£1,500 |
Setting Out Case Study: Mixed-Use Development East London
icelabz provided comprehensive survey and setting out services for a mixed-use development in East London. The project involved new-build construction on a challenging urban site with complex neighbour relationships and tight tolerances.
This case study describes the project, the challenges, and how survey and setting out services delivered successful outcomes.
Project Overview
The project was a mixed-use development in East London comprising residential units above ground-floor retail. The scheme involved:
New-build construction: Five floors of residential apartments above a retail podium. Steel frame construction with concrete floors.
Urban site: The site was bounded by existing buildings on three sides. Adjacent properties included Victorian terraces and a modern office building.
Basement level: A single basement level for parking and plant. Construction involved contiguous piling and basement slab.
Programme: Twenty-four month construction programme with phased handover of residential units.
Survey Services Provided
icelabz provided a full range of survey services throughout the project:
Topographical survey: Pre-construction survey of the site and surrounding area. Established OS coordinate and level control.
As-built surveys: Regular as-built surveys of the basement structure, structural frame, and each floor plate.
Setting out: Comprehensive setting out for all structural elements, boundary walls, and key architectural features.
Monitoring surveys: Crack and level monitoring of adjacent properties throughout the construction period.
Key Challenges
The project presented several challenges:
Tight site: The urban site left minimal working space. Setting out had to be precise to avoid encroachment on boundaries.
Adjacent structures: Victorian terraces on one boundary were sensitive to movement. Monitoring was essential throughout the basement construction phase.
Phased handover: Residential units were handed over in phases. Setting out for completed areas had to be verified and signed off before each handover.
Deep basement: Construction of the basement required contiguous piling close to the site boundary. Monitoring of adjacent structures was critical.
Survey Approach
icelabz established a comprehensive survey control network:
Primary control: OS-derived coordinates and levels established on stable reference points outside the zone of construction influence.
Secondary control: Site grid established from primary control. Steelwork grid lines set out from primary control points.
Monitoring points: Crack gauges and level monitoring points installed on adjacent Victorian terraces before construction began.
Regular monitoring: Weekly crack and level monitoring throughout the basement construction phase. Frequency increased during critical periods.
Setting Out Services
Setting out services covered all stages of construction:
Boundary walls: Setting out of boundary walls confirmed positions before construction. Boundary wall positions verified against title plans.
Contiguous pile positions: Setting out of contiguous piles for basement. Piles set out to millimetre tolerance.
Basement slab: Setting out of basement slab, walls, and columns. Grid lines established for steel frame erection.
Structural frame: Setting out of steel frame positions at each floor level. Column positions, connection points, and core positions set out.
Architectural features: Setting out of key architectural features — lift cores, stair cores, boundary walls, and façade positions.
As-Built Verification
As-built surveys verified construction against design:
Basement structure: As-built survey of the completed basement. Verification of pile positions, slab levels, and wall positions.
Structural frame: As-built surveys at each floor level. Verification of column positions, beam levels, and connection geometry.
Façade: As-built survey of the completed façade. Verification of window positions, balcony positions, and cladding fixings.
As-built data was provided to the design team for coordination and to the client for FM documentation.
Monitoring Results
Monitoring surveys ran throughout the construction period:
Baseline survey: Complete baseline survey of all adjacent properties before construction began.
Weekly monitoring: Weekly crack and level monitoring during the basement construction phase.
Alert response: No trigger level exceedances occurred during the project. Movement remained within amber thresholds throughout.
Post-completion monitoring: Monitoring continued for three months after the basement was complete. Readings confirmed stability before monitoring was discontinued.
Monitoring data provided assurance to the client, the contractor, and the party wall surveyors throughout the project.
Outcome
The project was completed successfully:
On programme: Survey services supported the construction programme throughout. Setting out was completed on schedule at each stage.
Within budget: All survey services were delivered within the fixed-fee budget agreed at the outset.
No disputes: No disputes arose with adjacent property owners. Monitoring data provided evidence that construction had not caused damage.
Phased handover: Setting out and as-built verification supported phased handover of residential units on schedule.
Lessons Learned
Several lessons emerged from the project:
Early monitoring installation: Installing monitoring before construction begins is essential. Late installation means no baseline.
Coordinate system consistency: Consistent use of the same coordinate system throughout the project avoids errors and confusion.
Regular as-built surveys: Regular as-built surveys catch errors early. Monthly as-built surveys throughout construction are recommended.
Communication: Regular communication between the survey team, the contractor, and the design team ensures setting out supports the programme.
Fixed-Fee Survey Services
icelabz provides fixed-fee survey services for construction projects. Services include topographical surveys, setting out, as-built surveys, and monitoring surveys.
All work is fixed-fee with no hidden charges. Contact icelabz with your project requirements for a fixed-fee quote.