Domestic Clients

Select one of our most popular services

We provide tailored Structural Engineering Solutions, for residential extensions, loft space and basement conversions as well as new builds for domestic clients. Our expertise derives from several years of combined experience in the domestic sector, which reassures Structural solutions that are safe and cost-effective. 


We are experts in the structural design of rear and side extensions, refurbishments, loft and basement conversions. From a knock through an internal load-bearing wall for your open plan layout to large-scale remodelling of an existing building or a new build structure, Ritzi Ltd is providing experts design knowledge and advise saving cost without compromising on quality or structural integrity. 


With offices in London, we can ensure that our Engineers will make regular visits to monitor safety on site and we will liaise with local authorities and other consultants for technical queries. We offer project management and monitoring services for the clients that require a headache-free process in dealing with planners, various consultants, value engineering and the construction process.

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.  


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

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New Build

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


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


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.   


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.  

Learn More about our Design Process 


The design team engages early to drive innovation and value from the start, employing a highly collaborative approach with our customers and other stakeholders, converting their vision into reality.  We can obtain quotations for the construction work on your behalf and assist you in the selection of a competent contractor.


When it comes to managing and designing your new project, Ritzi Ltd Client team helps you to focus on what’s important assisting you in the selection of the most cost-effective solution. Through strong client relationships and a thorough understanding of your current situation and long-term aspirations, we will help make the development process of your asset easier, providing clear, tailored advice you can trust. Whatever stage you’re at in your project, we will help you get the most out of your scheme reducing the construction cost with reliable solutions.

Our design process includes an initial visit where we will establish your requirements and we will set a brief for structural design and specifications to follow. We will guide you through the process and assist you in the selection of the most economic and robust materials to achieve the desired layout that will comply fully with building regulations. 


We will develop a structural design calculation package in addition to technical drawings and specifications ready to be submitted to building control for approval and details will be drafted to help the construction works.  Our deliverables will comprise a set of general arrangement and detail drawings together with a set of structural design calculations. These will be suitable for your submission to the Local Authority for their review under Part A (Structure) of the Building Regulations and the contractor's construction purposes. When work is completed to our satisfaction a Completion Certificate is issued within 5 working days. A completion certificate is a valuable document which will help when it comes time to sell the property in the future.

Recent Projects

Thompson Avenue
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. 

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. 


To apply for a job at Ritzi Structural Engineering Consultants, please send a cover letter together with your C.V. To:


Useful Links



New Build

Rear and Side Extension

Loft / Basement Conversion 



Project Management 

Clients Representative 


We have extensive experience of designing large-scale structures in the United Kingdom with a wide understanding of the technical and procurement issues that may arise.

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