House Extension Structural Engineering - professional structural calculations for residential extensions
House Extensions
Expert structural engineering for single-storey, double-storey, side, and wrap-around extensions.
Learn More →Structural Consultants & Architecture Design
Structural Engineers & Architectural Designers UK
Delivering expert structural calculations, surveys, reports, and architectural plans for residential and commercial clients across the UK.
50+
Qualified Professionals
15+
Areas Covered
100%
Building Reg Approved
Your Trusted Structural Engineering Partners
DW Design & Structure LTD is a leading structural engineering, surveying, architecture, and design firm specializing in both residential and commercial projects.
We combine technical expertise with practical knowledge to deliver unparalleled structural calculations, surveys, and architectural designs with unwavering precision. Our straightforward, honest, and reliable approach has earned us the trust of homeowners, developers, architects, and contractors across the South East.
Areas We Serve
Our team of skilled Structural Engineers and Surveyors actively works across:
- London — All boroughs
- Kent — Maidstone, Tunbridge Wells, Canterbury
- Sussex — Brighton, Crawley, Worthing
- Surrey — Guildford, Woking, Reigate
- Hampshire — Southampton, Portsmouth, Winchester
- Berkshire
- Oxfordshire
- Buckinghamshire
- Hertfordshire
- Essex
Who we work with
We proudly serve a diverse range of clients, including:
Domestic & Commercial Property Owners
Architects & Developers
Leisure & Healthcare Facilities
Multi-Million Pound Enterprises
Our commitment
Delivering unparalleled structural calculations, surveys, and architectural designs with unwavering precision.
Average project volume
Large-scale
Team size
50+ Professionals
Regional reach
Broad
Our Structural Engineering Services
We provide comprehensive structural engineering services for projects of all sizes:
Loft Conversion Structural Engineering - dormer, velux and mansard conversions
Loft Conversions
Structural design for dormer, Velux, mansard, and hip-to-gable loft conversions.
Learn More →Structural Surveys - building surveys and defect analysis
Structural Surveys
Comprehensive building surveys, defect analysis, and pre-purchase assessments.
Learn More →Architectural Design Services - planning applications and building drawings
Architectural Design
Full architectural services from planning applications to construction drawings.
Learn More →Steel Structure Design - steel beams and portal frames
Steel Structures
Design of steel beams, portal frames, and industrial building structures.
Learn More →Commercial Building Design - retail, office and industrial design
Commercial Design
Professional design for retail, office, and industrial commercial buildings.
Learn More →Precision
Delivering accurate measurements, calculations, and drawings to guarantee flawless execution.
Innovation
Applying modern engineering tools and creative problem-solving to develop efficient, forward-looking solutions.
Commitment
Ensuring every project is completed on schedule, within budget, and to the highest quality standards.
Integrity
Conducting all business with transparency, honesty, and ethical practices.
Collaboration
Partnering effectively with clients, architects, and contractors to achieve shared success.
Sustainability
Designing responsibly to minimize waste and promote energy-efficient solutions.
Adaptability
Addressing challenges with flexibility to maintain smooth and timely project delivery.
Why Choose DW Design & Structure LTD?
Expertise & Experience
Our team of seasoned professionals possesses the knowledge and skills to successfully deliver projects of every scale and complexity.
Innovation & Creativity
We bring fresh ideas and innovative solutions to every project, constantly pushing boundaries to achieve outstanding results.
Attention to Detail
With a meticulous approach, we ensure accuracy and precision at every stage, delivering work to the highest standards.
Clear Communication
We value transparency and collaboration, keeping clients informed and engaged throughout the entire process.
Client Satisfaction
Your satisfaction is our priority — we go the extra mile to meet your needs and exceed expectations.
Complete Compliance
All our work meets UK Building Regulations and is accepted by all local authority building control departments.
What Our Clients Say
DWDS LTD exceeded our expectations from start to finish. Their design team turned our vision into reality with such attention to detail, and the construction work was delivered on time with top-notch quality. Truly a professional company that cares about customer satisfaction.
We hired DWDS LTD for our commercial project and couldn’t be happier with the results. Their innovative designs, efficient project management, and strong communication made the whole process stress-free. Highly recommended for anyone looking for reliable construction services.
Working with DWDS LTD was a great experience. The team is professional, creative, and highly skilled. They transformed our space beautifully while staying within budget and timeline. Their dedication and workmanship are outstanding!
Planning a project? Contact our team for a conversation about your requirements.
Frequently Asked Questions
What does a structural engineer do?
A structural engineer designs and analyses structures to ensure they can safely support loads and resist forces. They work on buildings, bridges, and other structures, providing calculations and drawings that ensure structural integrity and compliance with building regulations.
Do I need a structural engineer?
You typically need a structural engineer for house extensions, loft conversions, removing load-bearing walls, chimney stack removal, new builds, structural alterations, or when buying/selling property. If you're unsure, contact us for a free consultation.
How much does a structural engineer cost?
Structural engineering costs vary by project type and complexity. Residential structural surveys typically cost £400-£1,500, while extension calculations range from £800-£3,000. Commercial projects vary more widely. Contact us for a free quote.
What areas do you cover?
We cover London, Kent, Surrey, Sussex, Hampshire, Berkshire, Oxfordshire, Buckinghamshire, Hertfordshire, Essex, East Anglia, Norfolk, Suffolk, Cambridgeshire, and Peterborough. Contact us to confirm coverage for your specific location.
How long does a structural survey take?
A standard structural survey takes 2-4 hours on-site. Reports are typically delivered within 5-7 working days. We offer expedited services when project timelines require faster turnaround.
Are your calculations approved by building control?
Yes, all structural calculations and designs produced by DW Design & Structure LTD comply with UK Building Regulations and are accepted by all local authority building control departments.
What's the difference between a structural engineer and an architect?
An architect focuses on the appearance and layout of a building, while a structural engineer ensures the structure is safe and can bear loads. For most residential projects, you need both. We provide both architectural design and structural engineering services.
Ready to Start Your Project?
Contact DW Design & Structure LTD today for a free consultation on your structural engineering requirements.