Chertsey Lane | Structural Engineer Near Me

Project overview

“A tired 1990s family home reworked into a bright, open layout suited to modern living.”

The rear of the house was extended at ground level to create an open-plan kitchen, dining and living space with bi-fold doors onto the garden, while the loft was converted to add a master suite with en-suite and dressing area.

The existing layout was dark and compartmentalised, with a dated kitchen disconnected from the garden and no usable loft space. The brief called for more natural light, better flow between rooms, and an additional bedroom without extending the building's footprint significantly.

Full architectural design & build

The problem

A dark, compartmentalised layout with no room to grow.

The existing kitchen was small and disconnected from the garden, the ground floor felt closed off room-to-room, and the loft was unused storage space rather than a bedroom.

The family needed an additional bedroom and more natural light without significantly enlarging the building's footprint.

The solution

A rear extension and loft conversion working together.

A single-storey rear extension opened the ground floor into a bright, open-plan kitchen, dining and living space with bi-fold doors onto the garden. Above, the loft was converted into a master suite with dressing area and en-suite bathroom.

Single-storey rear extension with open-plan kitchen, dining & living space
Loft conversion with master suite, dressing area & en-suite
Full structural engineering & building regulations package
Bi-fold doors connecting the kitchen to the rear garden

Cost & quotes

What the build delivered.

2 Months

Design duration

6 Months

Build timeline

+20%

Value boost

+40%

Kitchen usage

+35%

Natural light

Feasibility & site survey

Existing layout review & extension feasibility

£79,040

Architectural & structural drawings

Rear & side extension design and technical package

£174,040

Landscape design

Masterplan & planting, minor works

£95,000

Planning & building control liaison

Submission pack and coordination with the local planning authority

£31,920

Total project value £380,000

Site assessment & desktop study21%

Structural calculations46%

Drawings & beam schedule25%

Building control liaison8%

Team

Extension Architecture

The team behind this Chertsey Lane project.

Extension Architecture

Lead architect

Full build

SCC

Surrey County Council

Planning authority

Approved

Getting a quote from

Your project

What do you need
a structural engineer for?

Pick the option that best describes your project. You can refine the details later.

Loft conversion

Structural calculations, beam sizing, drawings for building control

Extension

Rear, side return, or wraparound — foundation and steelwork design

Load-bearing wall

Wall removal, RSJ beam design, structural sign-off

New build

Full structural engineering package from concept to completion

Structural survey

Condition assessment, defect report, and recommendations

Something else

Basement conversion, party wall, subsidence, or other

Your location

Where is the
property located?

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Project stage

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the process?

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Early exploration

Just getting a sense of cost and feasibility

Planning stage

Planning permission in progress or recently approved

Building control

Ready to submit — need full structural drawings and calculations

Survey or concern

Crack, movement, or structural query on an existing property

Your budget

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project budget?

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Up to £50K

Structural engineering typically: £800 – £1,500

<£50K£50–100K£100–250K£250–500K£500K–1M£1–3M

For a loft conversion, structural drawings typically cost £900–£1,600. Our published price guide means you'll know if a quote is fair before you accept it.

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Client review

"Three quotes back
within 24 hours."

Sarah J., homeowner in Manchester — loft conversion, March 2026. ★★★★★

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Chertsey Lane, Surrey

From brief to full transformation.

Drag to compare before to after.

From 210m² to 265m² of bright, open-plan living.

Chertsey Lane, Surrey.

A dark, compartmentalised layout with no room to grow.

A rear extension and loft conversion working together.

What the homeowner had to say.

What the build delivered.

Team

Ready to start your project?

What do you need
a structural engineer for?

Where is the
property located?

Where are you in
the process?

What's your approximate
project budget?

Where should engineers
send their quotes?

Searching 500+
engineers near you.

Chertsey Lane, Surrey

From brief to full transformation.

Drag to compare before to after.

From 210m² to 265m² of bright, open-plan living.

Chertsey Lane, Surrey.

A dark, compartmentalised layout with no room to grow.

A rear extension and loft conversion working together.

What the homeowner had to say.

What the build delivered.

Team

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