HTS Construction

Civil Engineering Design Services Across London

Civil engineering design covers everything around and below the building — drainage, levels, paving, boundaries and groundworks. For homeowners, landlords and small construction projects, getting these elements designed properly avoids flooding, failed structures and expensive rework on site.

Request a Quote →Residential drainage layout drawing showing pipe runs and manhole positions around a house extension

Civil design services

Residential drainage layout drawing showing pipe runs and manhole positions around a house extension

Drainage Design

Drainage layouts, pipe sizing and levels for residential building projects.

Find out more →Permeable block-paved driveway with a rain garden border beside a brick house

Surface Water Drainage

Managing rainwater from roofs, driveways and paved areas.

Find out more →Residential drainage layout drawing showing pipe runs and manhole positions around a house extension

Foul Water Drainage

Wastewater drainage layouts, connections and manhole design.

Find out more →Permeable block-paved driveway with a rain garden border beside a brick house

Sustainable Drainage Systems (SuDS)

Permeable paving, rain gardens and attenuation for planning-friendly drainage.

Find out more →Residential drainage layout drawing showing pipe runs and manhole positions around a house extension

Drainage Layouts and Calculations

Detailed drawings and hydraulic calculations for building control.

Find out more →Newly installed timber fence and gate along a garden boundary

Fence and Boundary Design

Layouts, heights, posts and foundations for fences and boundary walls.

Find out more →Site layout drawing showing garden levels, paving and drainage around a house

External Works and Site Layout Design

Levels, falls, access and paving coordinated into one site plan.

Find out more →Site layout drawing showing garden levels, paving and drainage around a house

Minor Civil Engineering Design

Small retaining walls, steps, ramps and other external structures.

Find out more →Excavated foundation trench with poured concrete and setting-out string lines

Groundworks and Foundation Layouts

Setting-out drawings for excavation and foundations.

Find out more →Site layout drawing showing garden levels, paving and drainage around a house

Paving, Hardstanding and Access Design

Levels, falls and construction build-ups for driveways and paving.

Find out more →

Our design process

  1. 1

    Initial enquiry

    Tell us about your project through the contact form, including any drawings or photographs you already have.

  2. 2

    Review of information

    We review the available information — existing drawings, architectural proposals, site measurements and photographs — and confirm what is needed.

  3. 3

    Quotation

    We agree the scope and fee with you before any design work begins, so you know exactly what will be provided.

  4. 4

    Design and checking

    We carry out the agreed calculations, drawings or specifications, checked against the relevant standards.

  5. 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 may ask you for

  • Architectural drawings or a measured sketch of the proposals
  • Site photographs, including any problem areas such as flooding
  • Existing drainage plans, surveys or records where available
  • The site address, so public sewer and other records can be checked
  • Any requirements already raised by planning or building control

Frequently asked questions

Do small residential projects really need civil design?
Not always — but anything involving drainage, levels, retaining or vehicle access benefits from proper design, and building control often requires it for extensions.
Can you design drainage for an extension?
Yes — drainage design for extensions is one of our most common civil design commissions, including layouts and calculations for building control.
Do you carry out the physical groundworks as well?
Yes — our construction services include groundworks and drainage installation, so design and build can be coordinated by one company.
What does a drainage statement involve?
It sets out how surface and foul water from the development will be managed, often required by London boroughs for planning. We prepare these as part of the design scope.

Related services

Tell us about your project

Describe what you need and we'll come back to you about a quotation.

Request a Quote