Minor Civil Engineering Design in London
Not every piece of civil engineering is a motorway. Residential projects regularly need small but properly designed structures — a low retaining wall for a raised patio, steps that meet regulations, a ramp for level access, or a channel drain across a driveway. This service covers those smaller elements that still need to be designed correctly.

Scope of work
- Design of small retaining walls and garden structures
- Step and ramp design to suit the users and the regulations
- Channel drains and threshold drainage
- Small concrete slabs, bases and hardstandings
- Coordination with drainage and site layout design
Typical applications
- Raised patios and terraced gardens
- Level access for wheelchair users or pushchairs
- Driveway thresholds that keep water out of garages
- Bases for sheds, garden rooms and equipment
Our design process
- 1
Initial enquiry
Tell us about your project through the contact form, including any drawings or photographs you already have.
- 2
Review of information
We review the available information — existing drawings, architectural proposals, site measurements and photographs — and confirm what is needed.
- 3
Quotation
We agree the scope and fee with you before any design work begins, so you know exactly what will be provided.
- 4
Design and checking
We carry out the agreed calculations, drawings or specifications, checked against the relevant standards.
- 5
Issue of deliverables
The agreed drawings, calculations or design notes are issued to you electronically, ready for your builder or building control.
Information we will need
- A sketch or plan of the area with approximate dimensions
- Photographs showing existing levels and conditions
- What the structure needs to achieve — height retained, access needed, load carried
- Any existing drawings of the property
Deliverables
- Design drawings and construction details
- Calculations for retaining or load-bearing elements
- A specification of materials where required
Limitations and approvals
Retaining walls above a modest height, or walls supporting driveways or neighbouring land, can need more detailed investigation and design. We will tell you at enquiry stage if your project goes beyond minor works and what that involves.
Frequently asked questions
- How high can a garden retaining wall be before it needs proper design?
- Even low walls can fail if badly built, but once a wall retains around a metre or more of ground, or supports a driveway, it should always be properly designed.
- Can you design a ramp for wheelchair access?
- Yes — ramps are designed to the appropriate gradients, widths and landing sizes so they are safe and comfortable to use.
- Do small structures need building control approval?
- Some do, particularly retaining structures and anything attached to the house. We will advise what applies to your project.
Related services
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