CIVIL ENGINEERING
Practical drainage and external works design for small developments.
Civil engineering support for drainage, levels and external works, coordinated with planning, architecture and site constraints on residential and light commercial projects.
GUIDE FEE
From £1,250 + VAT
TYPICAL PROGRAMME
Typically 5 to 10 working days
BEST FOR
Extensions, infill and small developments
WHAT THIS SERVICE DOES
Water, levels and ground conditions are easy to overlook because the critical work is buried.
Small-project civil engineering coordinates foul and surface water drainage, external levels and related ground works with the architecture, access and site constraints. The design focuses on practical falls, connections and the information needed for the relevant stage.
Why it is required
It is required because water must be managed below finished gardens, drives and floors. Inadequate falls, unavailable connections or unresolved level differences can create flooding, damp, access and construction problems after the visible work is complete.
The homeowner experiences a dry threshold, usable garden and trouble-free drainage. The engineering value sits quietly below the surface.

What you receive
01
Drainage strategy
Foul and surface water proposals developed around available records and site constraints.
02
Levels and coordination
Practical falls, thresholds and external levels considered with architecture and access.
03
Technical information
Design notes and drawings prepared for the agreed approval or construction stage.
BEHIND THE FINISHES
What your engineer is tracing before the work disappears.
Structural engineering is largely about understanding the elements a finished home will conceal. These are the decisions that protect safety, comfort, approvals and the cost of changing course later.
01
Pipe gradients
The falls that allow foul and surface water to move reliably below ground.
02
Connection points
Where new drainage can lawfully and practically join the existing system.
03
Surface water route
Infiltration, attenuation or discharge arrangements suited to the site information.
04
External levels
Thresholds, access, falls and build-ups coordinated before paving and landscaping.
A straightforward route from brief to build.
01 Share the address, proposed works and any drawings or photographs.
02 We confirm scope, fee, information needed and whether a visit is appropriate.
03 Your engineer delivers the agreed information and supports reasonable review queries.
PLAN THE WHOLE PROJECT
Connected structural decisions should be resolved together.
Many projects need more than one isolated calculation or visit. Explore the linked services below, or share the complete brief so the right scope can be confirmed once.
Extension structural design
Coordinate below-ground and above-ground decisions across the project.
Explore this service
Planning and measured surveys
Build the design from reliable levels and existing information.
Explore this service
Structural inspections
Review defined construction stages before below-ground work is concealed.
Explore this service
Questions, answered clearly.
Do you carry out CCTV drainage surveys?
We can review supplied survey information and advise when a specialist CCTV survey or utility search is needed.
Can you design sustainable drainage?
Yes, for proportionate small-project requirements, subject to suitable ground and site information.
Get clarity on scope, fee and next steps.
Submit the project information through the quote form for an engineer-reviewed scope and fixed-fee proposal.