Structural Engineers
Professional structural engineering for house extensions, loft conversions, and any new builds. All our drawings are guaranteed building control approval with competitive pricing and guaranteed fast turnaround.
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Structural Engineer Costs in 2025
Understanding structural engineer costs in 2025 helps you budget effectively for your extension project. AC Design Solution offers transparent pricing for all structural engineering services:
SINGLE STOREY
FROM
Complete structural calculations and drawings for ground floor extensions, kitchen expansions, and single-level additions to your home.
Loft Conversions
FROM
Professional structural assessments to transform your loft space into functional living areas with proper load-bearing calculations.
DOUBLE STOREY
FROM
Comprehensive structural design for multi-level extensions requiring complex load calculations and building regulations compliance.
BASEMENTS
INDIVDUAL
Specialized structural engineering for basement conversions, underpinning, and below-ground extensions requiring expert foundation work.
Why Choose AC Design Solution for Your House Extension
12 Years Experience
Complex structural engineering projects with proven track record
Value Engineered Solutions
Optimized designs that reduce costs without compromising structural integrity
Complex Extension Projects
Basement conversions, multi-storey extensions, and challenging structural modifications
Fast Service
Client Stories
Don’t just take our word for it – hear directly from satisfied clients about their experience working with us. These real stories demonstrate why businesses trust us to deliver outstanding results every time
Housing Structural Engineering FAQ
Planning a home extension? Our FAQ section addresses the key questions homeowners ask about structural engineering requirements, costs, timelines, and design processes to help you make informed decisions about your project.
Q. What do you need from me to start my extension project?
We need your architectural design drawings or detailed sketches showing the proposed extension layout and dimensions. Information about your existing building construction is helpful,
Q. Do I need a structural engineer for my house extension?
Yes, most house extensions require structural engineering calculations to comply with Building Regulations. You’ll likely to need a structural engineer when your extension involves new foundations, making structural changes, or significant loads on your existing building.
A structural engineer can provide the necessary calculations and drawings required by local building control. When building an extension, engineers don’t just design – they ensure the stability of the building and structural integrity throughout the building project.
ed your architectural design drawings or detailed sketches showing the proposed extension layout and dimensions. Information about your existing building construction is helpful, along with any previous structural report or building survey details if available.
A structural inspection may be required for complex extensions or where possible structural issues are unclear. We’ll discuss specific requirements during your free initial consultation and provide a clear checklist for your home renovation project.
Q. How much does a house extension structural engineer cost?
Our house extension structural engineer costs start from £800 for simple single storey extensions. Double storey extensions typically cost from £1,200, while loft conversions start from £900. The structural engineer cost depends on the complexity of the project and specific structural issues involved.
All fees include complete structural calculations, drawings, and Building Control documentation. We provide structural engineering services with transparent pricing, so projects don’t cost a lot more than expected with hidden fees.
We need your architectural design drawings or detailed sketches showing the proposed extension layout and dimensions. Information about your existing building construction is helpful, along with any previous structural report or building survey details if available.
A structural inspection may be required for complex extensions or where possible structural issues are unclear. We’ll discuss specific requirements during your free initial consultation and provide a clear checklist for your home renovation project.
Q. How long do extension structural calculations take?
Most extension structural calculations are completed within 1-2 weeks of instruction. Simple single storey extensions may be completed faster, while complex projects requiring structural surveys or structural damage assessments may require up to 3 weeks.
Our structural engineer’s expertise ensures calculations are thorough and accurate. We provide realistic timescales during your initial consultation and keep you informed of progress throughout your building works.
your architectural design drawings or detailed sketches showing the proposed extension layout and dimensions. Information about your existing building construction is helpful, along with any previous structural report or building survey details if available.
A structural inspection may be required for complex extensions or where possible structural issues are unclear. We’ll discuss specific requirements during your free initial consultation and provide a clear checklist for your home renovation project.
What You Need to get started
→ Architectural drawings
→ Site survey
→ Planning permission (if required)
→ Clear project brief