Extensions

Planning, Architectural Drawings & Structural Calculations for All Types of Extensions

A well-designed house extension can transform your home, adding space, increasing property value and improving how you live day-to-day. CCS SOLUTIONS, we specialise in designing and delivering high-quality house extensions across Swansea, Neath, Port Talbot, Llanelli, Bridgend, Cardiff and the wider South Wales region.

Please get in touch with our team today.

Whether you want a rear extension, side extension, wrap-around, two-storey addition or internal re-configuration, we provide everything you need from start to finish:

  • Architectural drawings
  • Structural calculations
  • Planning permission
  • Building Regulations
  • Project design and layouts
  • Support during construction

Our extensions are compliant, practical, visually appealing and structurally safe, designed with both the homeowner and builder in mind

Types of Extensions We Design

➤ Single-Storey Rear Extensions
Ideal for:

  • Open-plan kitchens
  • Living/dining spaces
  • Utility rooms
  • Downstairs bathrooms

Rear extensions are often the most popular and cost-effective way to expand your home. We design layouts that maximise natural light, flow and functionality.

➤ Side Extensions
Perfect for:

  • Widening narrow homes
  • Adding ground floor bedrooms
  • Creating larger kitchens
  • Adding utility or storage spaces

Side extensions require careful planning, especially on semi-detached or terrace properties, we ensure compliance with planning policy and neighbour considerations.

➤ Two-Storey Extensions
Increase both ground and first-floor space at once.

Suitable for:

  • Adding bedrooms
  • Expanding bathrooms
  • Creating upstairs offices
  • Increasing property value significantly

These require strong planning arguments, structural design and careful proportioning, all of which we provide in-house.

➤ Wrap-Around Extensions (Side + Rear)
The most transformative extension type.

These create large, bright open-plan spaces and allow full redesign of the ground floor layout.

We handle:

  • Structural design
  • Steel beam calculations
  • Roof layout
  • Drainage adjustments
  • Planning strategy

➤ Front Extensions / Porches
A small front extension or porch can improve:

  • Kerb appeal
  • Entrance storage
  • Thermal performance

We handle design, planning and LDCs for porch extensions.

➤ Garage Conversions + Extensions
Convert unused garage space and combine it with an extension to create a larger living area or an additional bedroom.

We supply:

  • Conversion drawings
  • Structural calculations
  • New foundations if required
  • Insulation upgrades

Everything You Need for Your Extension — All In One Place

Most companies offer drawings OR calculations.

We provide everything under one roof:

✔ Planning Drawings
Plans, elevations, roof layouts, street scene, site plans, block plans.

✔ Structural Calculations
For:

  • RSJs
  • Steel beam connection details
  • Roof structures
  • Load-bearing wall removals
  • Foundation design

✔ Building Regulations Drawings
Detailed construction drawings ready for Building Control.

✔ Planning Permission
Full applications, Lawful Development Certificates, appeals & pre-apps.

✔ Interior Layout Design
Space planning, kitchen layouts, moving walls, circulation flow.

✔ Support During Construction
We help builders interpret the plans and resolve technical queries.

This gives you a seamless process from concept → design → approval → construction.

We assess this for you and advise whether:

✔ Planning Permission

or

✔ Lawful Development Certificate (LDC)

…is required.

Submitting an LDC is recommended even for permitted development to avoid issues during future property sales.

Does a House Extension Need Planning Permission?

Many extensions can be built under Permitted Development, including:

  • Single-storey rear extensions
  • Some side extensions
  • Garage conversions
  • Certain roof alterations

But it depends on:

  • Property type
  • Conservation area status
  • Size limits
  • Height restrictions
  • Design considerations
  • Proximity to boundaries

Our Process for Designing Your Extension

  • Initial Consultation
    We discuss your ideas, lifestyle needs and project goals.

  • Measured Survey
    We attend your property and measure the existing layout accurately.

  • Concept Designs
    We produce 2–3 layout options showing how the extension could work.

  • Planning Drawings
    We prepare all required plans for the council.

  • Planning Submission
    We submit the application to your Local Authority and act as your agent.

  • Structural Calculations
    Once planning is approved, we design:

  • Steel beams

  • Foundation size

  • Roof support

  • Load paths

  • Pad stones

  • Lintels

  • Building Regulations Drawings
    We prepare detailed construction drawings ready for Building Control.

  • Construction Support
    We assist you and your builder throughout the build.

Areas We Cover

We specialise in extensions across:

  • Swansea
  • Neath
  • Port Talbot
  • Llanelli
  • Bridgend
  • Cardiff
  • Vale of Glamorgan
  • RCT
  • Merthyr
  • Carmarthen

Why Choose CCS for Your House Extension?

  • Local Knowledge: We understand Swansea and South Wales planning policies.
  • In-House Structural Engineering: No need to hire a separate structural engineer.
  • Fast Turnaround: Planning drawings often completed within 7–14 days.
  • 600+ Successful Projects: Extensive portfolio of completed extensions.
  • Builder-Friendly Drawings: Clear, simple and ready to build from.
  • Complete Service: Planning + Structural + Building Regs all handled by us.
  • Transparent Pricing: No hidden fees.

Contact Complete CAD & Structural Solutions Limited

Give us a call today to find out more about our services.