New build ยท 10 Year Structural Warranty
High Street, Harrow
A six-storey block of 33 apartments replacing an office building on High Street, Harrow.
- 33 homesScheme
- 12Inspection visits recorded
- 5Build stages logged
- 2026Year
- Inspections ongoingStatus
Inspection record
The build, stage by stage
Each stage was seen before it was covered up. This is the record the warranty is built on.
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Stage 1
Foundations
Steel reinforcement went in to the structural engineer's design, with Block A around 90% done.
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Stage 2
Walls
Concrete was poured to the columns and reinforcement went in to further columns and the lift, with minimum 40mm cover maintained.
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Stage 3
Floors
Reinforcement to the first floor was installed to the structural engineer's design and walked on site.
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Stage 4
Floors
The floor 6 reinforcement was installed to the structural engineer's design, with the engineer's inspection.
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Stage 5
Walls
The external steel framing system went in, with 15mm fire board to the external face and fire-rated insulation in the frame.
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Next
Final review and certificate
Once the remaining stages and the completion evidence are in, the 10 year structural warranty certificate can be issued.
Case study
What made this one interesting
The challenge
The job meant taking down an existing office building on the High Street and putting six storeys and 33 apartments in its place. The ground was stripped to evaluate the formation level, and the lower half of the site was reduced before foul drainage and the sub base went in.
How it was handled
We agreed the warranty stages at a site meeting in December 2024 and have inspected against them on 12 visits so far. Each visit walked the reinforcement with the site team, from the base through the columns and lift to each floor in turn. Steel was checked against the structural engineer's design, with minimum concrete cover checked as the floors went up.
The result
The job is still in progress. By October 2026 the reinforcement had reached floor 6 and the external steel framing, fire board and insulation were going on.
On site
More photos from Harrow
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