Surrey · RH6
Structural Calculations in Horley
Structural calculations are the engineering sign-off needed whenever a project alters or removes a load-bearing element — a steel beam over a knocked-through wall, a new foundation for an extension, or a strengthened floor for a loft conversion — set out in a structural drawing and calculation pack that Building Control checks the work against.
In Horley, that covers Massetts, Lonsdale, Smallfield, Horley Row, Westvale Park. Horley sits close to Gatwick Airport, with a historic village core and substantial 20th-century residential development around it, making it a popular area for family homeowners looking to extend rather than move.
Coverage
Areas we cover in Horley for structural calculations
Property styles in Horley
The older village centre includes period cottages and Victorian houses, while the wider town has significant interwar and postwar estate housing well suited to standard rear extensions and loft conversions.
Planning considerations
Reigate & Banstead Borough Council is the local planning authority. Properties close to Gatwick Airport may be subject to airport safeguarding consultation requirements for certain types of development, which we check where relevant.
How it works
Our structural calculations process
- 01
Site survey
Assessing the existing structure — what it is, what condition it's in, and what the proposed works need it to do.
- 02
Structural design
Sizing the beams, foundations or floor strengthening needed, coordinated with the architectural drawings where we're producing both.
- 03
Calculations pack
Preparing the formal calculation pack and structural drawings in the format Building Control and the wider design team need.
- 04
Building Control liaison
Submitting calculations to Building Control and handling any follow-up queries through to approval.
- 05
Construction support
Available through the build for any site queries as the structural work is carried out.
Also in this area
Other services we provide in Horley
Nearby coverage
Structural Calculations in nearby areas
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FAQs
Structural Calculations in Horley: FAQs
Do you provide structural calculations across all of Horley?
Yes, we cover the RH6 postcode area in full, including Massetts, Lonsdale, Smallfield, Horley Row, Westvale Park.
Do I need structural calculations for a loft conversion?
Almost always — the existing floor typically needs strengthening to take habitable-room loading, and any new stair opening or dormer usually needs its own structural design. Building Control will check the work against a calculation pack as part of sign-off.
Can you provide calculations for a beam I've already had designed elsewhere?
We generally produce calculations as part of a coherent structural design for the whole project, but get in touch with what you have and we'll advise whether we can work from it or whether it needs revisiting.
Does living near Gatwick Airport affect planning permission in Horley?
Some development types near the airport are subject to safeguarding consultation with the airport operator as part of the planning process. This does not apply to all projects, and we advise on the specific position for your address.
Get a quote for structural calculations in Horley
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Last reviewed 2026-07-19.