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Extensions

Residential engineering solutions ensuring safety and compliance.
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Extensions

Extensions are a smart way to increase living space, boost property value, and adapt your home to your changing needs.
Whether it’s a single-storey addition, a side return, or a two-storey build, extensions can transform layouts and add functionality. With expert structural planning, we ensure your extension is safe, compliant, and seamlessly integrated into your existing property.
Residential Extensions

Why Hire a Structural Engineer for Extensions?

A structural engineer doesn’t carry out the physical strengthening work themselves, but their role is absolutely essential to ensure your project is safe, compliant, and structurally sound.
They assess the loads and forces involved, determine what kind of reinforcement is needed, and create precise calculations and technical drawings that builders and contractors follow during construction.
Their input ensures that any changes to a building such as removing walls, chimneys, or adding extensions are supported correctly and won’t compromise the integrity of the structure. They also provide documentation needed for building control approval, helping you stay within legal regulations.
This is why you need a structural engineer: to design and guide the strengthening process properly, even if they’re not the ones physically doing the work.
structural engineer

Extension Support:

What We Design

Foundation Diagrams

Clear diagrams of foundation types (e.g. strip, raft, pile, or pad) tailored to soil conditions and structural requirements.

Steel or Timber Beams

Specifying structural beams or lintels to support walls, openings, and upper-storey loads.

Load-Bearing Walls

Reinforcing or designing walls to carry loads from the roof, floors, or additional storeys.

Structural Framing

Designing stable frameworks for walls, floors, and roofs using steel, timber, or concrete.

Columns and Supports

Designing vertical elements (internal or external) to carry loads from beams and roofs.

Roof Structure

Calculating and designing trusses, rafters, or beams to support roofing and withstand weather loads.

Floor Slabs

Designing structural floor slabs (concrete or timber) that are level and strong enough for the intended use.

Reinforced Concrete Work

Using rebar to strengthen concrete in foundations, beams, or slabs and prevent cracking under load.

Staircases and Landings

Ensuring new staircases are structurally sound, safe, and compliant with building codes.

Opening Reinforcements

Designing supports (like lintels or steel beams) for new openings in structural walls.

Bracing and Stability

Adding bracing to prevent sway or collapse, especially in high-wind or seismic zones.

Drainage Systems

Adapting or designing drainage to manage runoff and prevent water issues in the extension.

Extensions:

Key Risks to Be Aware Of

Structural

Instability


Without proper design, extensions can weaken the existing building’s foundation or walls, leading to cracks, shifting, or even collapse.

Non-compliance with Regulations

Failing to meet building codes can result in legal issues, costly fines, or having to redo work to meet safety standards.

Water

Damage

Poor integration of new and old structures can cause leaks, dampness, or drainage problems that damage both the extension and existing property.

Unforeseen

Costs

Unforeseen issues like ground conditions or inadequate support can cause delays and expensive repairs if not identified and addressed early.

Undertaking a residential or commercial project?

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