Home Extension Footings & Foundations by TWL Groundworks

Building Strong, Compliant Bases for House Extensions Across Somerset & the South West

When planning a home extension, one of the most important elements is what lies beneath—your footings and foundation. Without a correctly built and compliant base, your investment can suffer from structural issues, instability, or costly delays.

At TWL Groundworks, we specialise in extension groundwork including excavation, trench foundations, concrete pours, and drainage tie-ins. Whether you're adding a single-storey kitchen extension, a rear conservatory, or a double-storey side addition, our team provides the expertise to get it right from the ground up.

📸 A selection of images from our recent house extension projects will be displayed on the page, showing trench excavation, steel reinforcement, and concrete footing work.

Table of Contents

1. Why Foundations Are Crucial for Home Extensions

2. Our Full Groundwork Service for Property Extensions

3. Types of Footings We Install

4. Step-by-Step Extension Foundation Process

5. Building Regulation Compliance

6. Project Photo Showcase

7. Why Choose TWL Groundworks?

8. FAQs

1. Why Foundations Are Crucial for Home Extensions

Foundations are the supporting structure on which your entire extension rests. If the base isn’t strong, level, or deep enough, you risk cracks, sinking, and expensive future repairs.

Common risks from poor footings include:

• Uneven floors and misaligned brickwork

• Cracks in plaster and render

• Water ingress from poor drainage

• Structural movement over time

Our foundations are always constructed to meet Building Control specifications and are tailored to your specific extension design.

2. Our Full Groundwork Service for Property Extensions

TWL Groundworks offers a complete footing and foundation package for domestic clients and building contractors:

✅ Site clearing and setting out
✅ Excavation of trenches or pad foundations
✅ Steel rebar or mesh reinforcement
✅ Concrete pouring and levelling
✅ Drainage and utility duct installation
✅ Reinforced bases for conservatories or garages
✅ Damp-proof membrane and insulation if required

We liaise directly with Building Control officers to ensure timely inspections and approvals at each phase.

3. Types of Footings We Install

Every home and soil type is different. We offer several foundation options depending on your ground conditions and extension structure:

• Strip Foundations: Ideal for most house extensions, dug to a minimum of 1m or deeper.

• Trench Fill Foundations: A faster alternative using concrete poured to near ground level.

• Raft Foundations: Used for soft or clay-heavy ground, spreading the load evenly.

• Pad & Beam Foundations: Suitable for conservatories or lightweight timber extensions.

4. Step-by-Step Extension Foundation Process

Here's how we deliver a professional extension footing:

1️⃣ Site Setup & Marking Out – Accurate measurements and lines are drawn based on plans.
2️⃣ Excavation – Trenches are dug to the required depth (checked by Building Control).
3️⃣ Steel Placement – Rebar cages or mesh is installed for additional strength.
4️⃣ Concrete Pouring – High-strength concrete is poured and levelled.
5️⃣ Drainage and Pipe Ducts – We install or reroute foul and storm drainage.
6️⃣ Base Finishing – Once cured, the base is ready for the next phase of build.

5. Building Regulation Compliance

We ensure all our foundation work complies with:

• Part A of the Building Regulations (Structure)

• NHBC standards for residential foundations

• Minimum depth and frost protection requirements

• Damp-proof course (DPC) placement

TWL Groundworks also works alongside builders, architects, and local Building Control to ensure full sign-off before the structure begins.

6. 📸 Project Photo Showcase

Our project gallery will show key stages including:

• 📷 Trench digging and spoil removal

• 📷 Steel reinforcement setup

• 📷 Concrete pour with level check

• 📷 Finished foundation ready for brickwork

We’re proud to share real examples of work delivered on time and to spec.

7. Why Choose TWL Groundworks?

• ✅ Over 5 years' experience in domestic extensions

• ✅ Fully insured and compliant with UK Building Regs

• ✅ Local team serving Somerset, Bristol, Weston-super-Mare & South Wales

• ✅ CHAS, Constructionline Gold & Achilles certified

• ✅ Transparent pricing and reliable scheduling

• ✅ Clean, respectful team for residential sites

We provide homeowners and contractors with peace of mind that their project starts on a strong, compliant footing.

Frequently Asked Questions (FAQs)

Q1: How deep do you dig footings for a home extension?
A: Usually a minimum of 1m, but we adjust based on soil conditions and Building Control guidance.

Q2: Do I need reinforced footings?
A: Reinforcement is often required for double-storey extensions, heavy loads, or unstable ground.

Q3: How long does foundation work take?
A: Depending on size, most domestic extension footings are completed within 2–5 days.

Q4: Can you work with my builder or architect?
A: Yes, we coordinate with your builder and architect to ensure a seamless process.

Q5: What areas do you cover?
A: We work across Somerset, Bristol, North Somerset, Weston-super-Mare and South Wales.

Start Your Extension Project with Solid Foundations

Whether you're building a new kitchen, utility room, or two-storey extension, TWL Groundworks provides safe, certified, and durable footings that stand the test of time. Contact us today to arrange a site visit and quotation.

Get in Touch

📍 Visit: https://www.twlgroundworks.co.uk
📧 Email: twlgroundworks@gmail.com
📞 Mobile: 07702 518898