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Domestic Clients

Select one of our most popular services

Welcome to BLE — Experts in Structural Engineering for Your Home

At BLE, we bring your ideas to life with smart, reliable, and cost-effective structural engineering solutions. Whether you’re extending your home, converting your loft or basement, or starting a brand-new build, our team ensures your project is safe, efficient, and beautifully executed from start to finish.

With years of experience in the domestic sector, we understand what homeowners and developers need — structural designs that work in the real world, save money, and maintain the highest standards of safety and quality.

Our Expertise

We specialise in:

  • Rear and side extensions

  • Loft and basement conversions

  • Refurbishments and remodels

  • New build structural design

  • Internal alterations, including knock-throughs for open-plan layouts

From a simple wall removal to a full-scale transformation, BLE provides innovative structural design and expert advice to help you achieve your vision — without compromising on safety or style.

Rear/Side extension

We will design your rear extension on permitted development or full planning scheme. Our drawings & specifications will be ready to be submitted to building control for approval.  

Rear/Side extension
Loft 
Conversion 

We are specialists in Loft conversions with a track record of delivering innovative solutions on demanding site and planning constraints.   

Loft 
Conversion

Learn More

New Build

We will walk you through the process, from the initial concept till a completion certificated is obtained.   

New Build
Basement 
Conversion 

We have extensive experience in basement conversions, Temporary Works, Basement Impact Assessment, Construction Management plan, Planning support.

Basement 
Conversion 
Structural 
Opening 

Fast turnaround on small domestic structural openings. 

Same day quote.

 

Our calculations and drawings will be ready to be submitted to building control for approval.   

Structural 
Opening
Structural 
Survey 

Contact us for a specific structural defect (SSI) or for a general structural survey (GSI). Our report will be suitable for your local authority, mortgage provider and other legal entities.  

Structural 
Survey
Learn More about our Design Process 

Our Design and Project Process

At BLE, we believe that great results start with early collaboration. Our design team engages from the very beginning to drive innovation, efficiency, and value throughout your project. By working closely with clients, architects, contractors, and other stakeholders, we help turn your vision into reality with practical and forward-thinking structural solutions.

We can also obtain quotations for construction work on your behalf and assist in selecting a competent contractor, ensuring that every stage of your project runs smoothly and cost-effectively.

Client-Focused from Start to Finish

When it comes to managing and designing your project, the BLE client team helps you focus on what truly matters — achieving the most efficient, reliable, and cost-effective solutions.


Through strong relationships and a clear understanding of your goals, we make the development process easier and more transparent, providing tailored advice you can trust.


No matter what stage you’re at, we’ll help you get the most out of your project — reducing construction costs while maintaining the highest standards of quality and safety.

Our Design Process

Every project begins with an initial site visit to understand your requirements and establish a clear brief for structural design and specifications. We’ll guide you through each step, advising on the most robust and economical materials to achieve your desired layout while fully complying with building regulations.

We then produce a comprehensive structural design package, including:

  • Detailed technical drawings and specifications ready for Building Control approval

  • A complete set of structural design calculations

  • General arrangement and detail drawings suitable for Local Authority review under Part A (Structure) of the Building Regulations

These documents also serve as clear construction guidance for your contractor, ensuring accuracy and consistency throughout the build.

Once all works have been completed to our satisfaction, BLE will issue a Completion Certificate within 5 working days — a valuable document for your records and a key asset when it comes to selling your property in the future.

Recent Projects

REAR EXTENSION
REAR EXTENSION
NEW BUILD
NEW BUILD
REAR EXTENSION
Thompson Avenue
Richmond 
REAR EXTENSION
Thompson Avenue
Richmond 
Anchor 1
Anchor 2
Structural Survey 

Condition Report 

A concise, descriptive report suitable for smaller and newer properties. It is clearly coloured codes property, defects which may need attention. It also acts as a valuable MOT for homeowners looking to assess the condition of their property.


This may include: 

  • a concise description of the condition of each element of the property

  • condition ratings

  • summary of condition ratings and defects of the property 

  • any detailed description of the construction of the building or detailed advice on specific defects

The level of the survey could range from a single element to the entire building. 

Why Choose BLE

Based in London, our engineers carry out regular site visits to monitor progress and ensure everything runs smoothly. We’ll also handle communication with local authorities, architects, and other consultants, keeping your project on track and stress-free.

For clients who want a hands-off experience, we offer comprehensive project management and monitoring services, coordinating every detail — from planning applications to final construction — so you can focus on enjoying the results.

Request a Free Quote

To obtain a free quote fill in the form and upload floor plans if available. We will send you a detailed quote within 24 hours. 

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