Direct Access to Experienced Structural Engineers
Tashi Structures provides structural engineering services for homeowners, architects, developers, contractors and commercial clients across Dorset, Hampshire, Wiltshire and the South of England. From structural inspections and defect investigations to alterations, extensions and commercial developments, we deliver clear advice, practical solutions and responsive service directly from experienced engineers, without the layers of a large consultancy.
Why Tashi
Large Consultancy Expertise. Independent Consultancy Service.
Tashi Structures combines the technical capability of a major engineering practice with the responsiveness and personal service of an independent consultancy. Every project is led directly by Lewis Osborne, an experienced structural engineer with nearly two decades of industry experience across domestic, commercial, education, healthcare, industrial and residential sectors.
Where additional resources are required, Tashi Structures draws upon a carefully selected network of trusted collaborators including Chartered Structural Engineers, Civil Engineers, Project Engineers and Technicians. This flexible approach allows clients to benefit from specialist expertise and scalable project delivery without the overheads, delays and bureaucracy often associated with larger organisations.
The result is practical, cost-effective engineering delivered by people who understand both the technical and commercial realities of construction projects.
Services
How we can help
Change of Use Assessments
Structural engineering services for commercial alterations, refurbishments, change of use projects, accessibility improvements and redevelopment of existing buildings.
Chimney Removals
Structural design and assessment for the partial or complete removal of chimney breasts, chimney stacks and associated masonry.
Commercial Structural Advice & Design
Structural engineering services for developers, property owners, architects, contractors, funders and commercial clients.
Defect Diagnosis & Subsidence Investigations
Professional structural inspections for homeowners, purchasers, landlords, property professionals and commercial clients seeking clear, independent advice on the condition of a building.
Defect Investigations
Independent structural inspections, condition assessments and defect investigations for commercial buildings, industrial premises, property portfolios and managed assets.
Extensions
Structural design for home improvements ranging from simple wall removals and chimney alterations through to large extensions and significant internal reconfiguration works.
Clear Advice. Practical Solutions. Reliable Engineering.
About
Meet Lewis Osborne
Lewis Osborne is the founder and director of Tashi Structures Ltd.
With almost 20 years of structural engineering experience, Lewis has worked on projects ranging from domestic alterations and bespoke private homes through to multi-million-pound commercial developments, schools, healthcare facilities, industrial buildings and major residential schemes.
What our clients say
*Highly recommend* Lewis is very knowledgeable, professional, friendly and made us feel at ease. He replied quickly to my original enquiry and throughout and was very patient with all of my questions! He charges a very reasonable fee and the detailed report arrived soon after his visit. Thank you again Lewis
Lewis is highly professional, patient, efficient and personable. He accepted our small but slightly unusual & rather detailed small job. We required a ‘comfort’ report for our Landlord, which would confirm that the proposed apartment alterations were either structurally sound without calculations, or were sound, proved by Lewis’s calculations. The report also involved clear visuals, overlaying the proposals onto ‘as existing’ photos, enabling it to be easily understood by non-professionals. The report supported our successful Building Control application. Lewis’s charges are exceptionally reasonable. He honoured his quote despite additional time, & for which l felt uncomfortable and asked him for a further invoice. Lewis responded with speed & patience, to queries, explanations & revisions, and was happy to work with me to produce the report l wanted. I am very appreciative and thank you, Lewis.
Lewis provided an excellent service to help us plan for bifold doors. Prompt, friendly, helpful and professional, and I would not hesitate to use Tashi Structures again.
Tashi Structures were recommended by our RICS surveyor when we purchased our property. There were queries regarding historical subsidence and whether there was any ongoing movement. Lewis’ communication was excellent and timely. Appointments were arranged directly with the estate agent and even outside of typical working hours, so as to accommodate the vendors. Reports were written quickly, but carefully, and were very thorough. Report findings were also corroborated by the vendors’ own independent (and unrelated to TS) engineer, who had been instructed by them and who had decades’ long history with the property. We then asked Tashi Structures to return and provide structural counts for our renovations. At this point, Lewis could have taken our cash, drawn up some counts and run, but he didn’t. He took a considerate and consultative approach. Encouraging us to seek advice from an architect before ploughing ahead with our plans, which might not have been financially viable to us. Lewis also took great care to simply explain construction and building issues to us, so that we could be fully informed despite not having any real sector knowledge of our own. We have really appreciated Tashi Structures integrity throughout this project and look forward to working with Lewis again, once we have finalised design plans.
I needed the services of a reliable and efficient structural engineer, Lewis from Tashi Structures did not disappoint. I have spent many years trying different engineers and can now say that I will definitely be using them again. Thanks again Lewis!
I needed a structural engineer to perform a survey of my property for issues with cracking. Lewis arrived at the arranged time and did a thorough examination of the property explaining important points as he went around and giving an initial assessment at the end of the visit. This was then followed up by the written report within a week which was detailed and covered what had been discussed verbally. His fee was in line with others that had provided quotes. I would recommend him!
Great service and good communication. Would highly recommend
Lewis is highly professional, patient, efficient and reliable, responded to add to check on a structural wall. Gave advice on more than one wall and was very helpful.
Lewis has been absolutely fantastic in preparing our report and supporting us through knocking down couple of walls and installing a beam, very communicative and helpful even once the report was issued. Could not recommend more highly.
Quick response to my initial inquiry, great communication, very professional yet friendly and approachable.
Great, professional service received from Lewis with great communication throughout.
Tashi Structures were a great help during a stressful time. Lewis is professional, communicates throughout and charges a very reasonable fee. The detailed report has given us peace of mind and a way forward with our purchase.
Recommend. Extremely professional and courteous.
Efficient, Informative and reasonably priced. Lewis was very helpful in explaining his conclusions regarding the cracking in the plasterwork of our house interior and its relationship to the building’s construction and age. His advice was clear and easy to follow for a non expert.
We recently used Lewis at Tashi Structures to review the structural adequacy of part of our house following a historic internal wall removal, and we were extremely impressed with the service provided.
I contacted Tashi Structures to assess a wall in our home which we want to remove. The service received was very prompt and professional. Lewis answered any and all questions we had before the visit, during the visit and after the report was received. All in all a very quick service, affordable price and friendly surveyors. Would definitely recommend.
Very responsive, great communication and thorough report. Would recommend using.
I needed a structural engineer at short notice. Spoke to Lewis and he arranged to come round in an evening to do the survey. Very professional and helpful, report came back within a couple of days well written and clearly explained. Would thoroughly recommend.
Great work! Even with our limited time frame Lewis was able to fit us in, investigate the project and give us an in depth project plan for our works needed doing and guide us in regards to planning permissions and building regulations etc. Even giving up his own weekend to make sure we had what we needed in time, 10/10 top bloke!
Clear communication, valuable advice and quick delivery. Couldn’t recommend Lewis highly enough. Five-star service.
Lewis is professional, prompt and has an excellent client approach.
Highly recommend! The service Lewis provides is excellent, he has a wealth of knowledge and a very calming presence to put your mind at ease with any structural concerns you may have. His report was very detailed and whilst he did not recommend any specific companies to complete the work he was very detailed in his recommended approach to remediations.
I contacted Tashi Structures regarding a structural survey that I needed in order to look at an open plan kitchen. Lewis came out to the flat and went through the plans and put together the requested report. Lewis offered advice and thoughts re the work when it turned out the wall was structural. This was above the ask and was really appreciated, an on the icy on the cake. I would definitely recommend Lewis to friends and family
I asked Lewis to do a structural survey for some cracking of an internal wall in a 110 year old house. His report came in two weeks, was comprehensive, and gave clear advice about the cause and remedy.
Lewis was exceptionally professional, friendly, and helpful throughout the process. The report we received was not only comprehensive and meticulously detailed but also offered excellent value for money. A top-notch service that we highly recommend.
Lewis was very informative regarding cracks in a wall in our cellar. I would highly recommend Lewis and Tashi Structures for all your structural engineering needs. Thank you.
Excellent service. Lewis was timely, good value and spent a lot of time and effort professionally analysing our property. Highly recommended
Very efficient and helpful. After a site visit a comprehensive detailed report was supplied. Would recommend.
I found Lewis from Tashi Structures very professional in my dealings with him. From first contact, Lewis communicated well, dealt promptly with the issue at hand and delivered expert and authoritative advice within a few days of his visit, including dealing with follow-up enquiries. Lewis charged a very competitive fee for his service. I have no hesitation in recommending Tashi Structures to others.
Good all round service, with a final report that addressed all my concerns.
I contacted Tashi via a local search facility for Structural Engineers. I had ongoing issues with my roof which I needed advice on how to proceed. I found Lewis very helpful he gave me good advice on how to proceed with a full report and practical advice as I needed it.
Lewis was very thorough with his inspection of our property. He was punctual, pleasant to deal with and clear and concise in advising on the problem. His report was extremely detailed explaining all the issues and the way forward. We would not hesitate in recommending him.
Very good service the comments and advise were 1st. class and exactly what I wanted. Would certainly employ again.
Extremely prompt and professional service from Lewis. Clear and concise report and advice.
Lewis was extremely helpful with our concerns and queries re our home. He answered all my questions and was very informative.
Quick and efficient
Lewis provided a complete and detailed analysis of my brickwork problem with probable reasons, prognosis, and details of remedial action. Thank you Lewis Osborne
Lewis helped us with some matters that came up on a homebuyers survey. He was quick to reply and help us. His report was detailed and findings explained to us well, despite the time pressures we faced! We would highly recommend Tashi Structures.
Lewis of Tashi Structures was very friendly, professional and knowledgeable, he took the time to answer all our questions and doubts and even delivered our drawings and plans very quickly after the initial visit. Very happy with his service.
Great service from Lewis at Tashi Structures. Everything went smoothly, the report was on time, clear, and exactly as expected. I would definitely recommend
Lewis was very professional and knowledgeable. He helped us out at short notice with a home renovation project. Thank you
An excellent service. A prompt response to my query, very detailed in what action had to be taken in dealing with cracks in a retaining wall. A professional service tnroughout, would highly recommend.
We required a structural report in support of our kitchen conversion. Lewis explained all my potential options which was reflected in the report. Highly recommend Lewis if requiring a structural engineer.
I contacted Tashi Structures regarding a potential reroofing project. Lewis was prompt to respond to my query and provided a signficant amount of advice as to what would likely be required. This enabled me to have targeted discussions with roofing contractors. Lewis offered this advice free of charge. I would thoroughly recommend Lewis and Tashi Structures and would come to them again should I require plans to be drawn up on future projects.
Lewis completed the work requested promptly and provided a good investigatory service.
Lewis from Tashi Structures was very friendly and professional and was very thorough with his inspection of our garage. Lewis’s report was very detailed and explained all the issues and how to move forward. I would highly recommend Lewis.
Very happy with the professional and clear service. Tashi Structures provided a comprehensive structural report and advised on remedial building repairs. I highly recommend and will use Tashi again in the future.
Lewis’ structural report was very helpful and informative. He was very quick to book an appointment and replied very quickly to emails, great customer service. I would highly recommend Lewis to anyone who needs a reliable structural engineer!
Very happy with the timely service. Everything easy to understand. Thank you.
Lewis carried out a structural inspection of a property we are in the process of purchasing. We received a highly detailed and thorough report that was of excellent quality. Lewis was professional and easy to communicate with throughout, including contacting the estate agent directly to organise his site visit which made our lives that bit easier. I wouldn’t hesitate to recommend his services.
Lewis is exceptionally thorough in his work and provides a friendly, professional manner during his inspections. We were very impressed with his work and report, which was clear, easy to understand and offered excellent advice with regards to fixing issues. Highly recommend.
Lewis from Tashi Structures has been nothing but obliging, helpful and professional to address concerns of what I perceived to be excessive vibration of my floors. He visited at a pre-arranged time to suit my personal schedule and provided a thorough inspection of both the inside and exterior of my home. He was courteous and listened well to my concerns. He subsequently provided a readable, helpful and reassuring report within a very reasonable time frame and at a very reasonable cost. Thank you to Tashi Structures who I happily recommend to any future potential clients.
Punctually got back to my query for the work i was investigating. Setup the appointment really well. Arrived and did a thorough investigation. Really happy with the report back. Great service. Would highly recommend.
Contacted Tashi Structures for a structural survey of my property. Very quick response and kept in contact throughout the whole process. The structural engineer Lewis was very friendly and professional. Extremely happy with this company and the service. Highly recommend 10/10
Lewis was pleasant, polite and turned upon time. He was very thorough checking not only what I had asked to but also the rest of the property. He report arrived promptly and was very thorough confirming what he had told me verbally and making necessary recommendations. I would have no hesitation in using Lewis again or recommending him.
Lewis has been very helpful in providing guidance and assurance with respect to our subsidence issue (caused by a historic mains water leak). This has been a stressful experience, in particular having to deal with a very unhelpful insurance company, and Lewis has provided much needed assurance with the works to be undertaken and reporting on the subsequent structural adequacy. Lewis provides a very personal service and responds to queries and requests for visits very promptly. He also provides clear explanations of the structural issues, the reasons for the occurrence and the best practical courses of action. I would have no hesitation recommending Lewis.
Most impressed with the speed of service and professional approach by Tashi Structures. A site visit was arranged quickly and a comprehensive report was delivered the following week. This is the first time I’ve needed to employ the services of a structural engineer and was quite daunted by some of the reviews of other companies but found Lewis Osborne easy to deal with, efficient and friendly in every respect. I would highly recommend his services.
We highly recommend Lewis. From initial booking to receiving a thorough, informative report; answering all our concerns. Thank you.
I would definitely recommend Tashi Structures I posted online a job that I needed doing and had a response straight away Lewis was very quick and thorough with his plans for my load bearing wall to be removed Lewis was very patient and polite (as we changed our minds on the design) Can’t wait for the wall to be knocked down and my new kitchen to be fitted Thanks Lewis
Don’t usually leave reviews, but the high level of service and flexibility offered to me by Tashi structures was second to none. I am a self builder who run into issues with a structural gabion basket design that had not been thought through by previous structural engineer. After contacting Lewis he acted quickly and decisively to dig me out of a hole. Professional and personable, I can’t speak highly enough of these guys!!!
Lewis couldn’t have been more helpful, really clear and communicative. Couldn’t recommend more.
Lewis quickly responded to our enquiry, sharing clear information about what service he can provide and costs. He was flexible to times and we were able to book in the survey with Lewis within a week. Lewis sent his report shortly after his inspection. The report was very comprehensive and clear, and he offered us a follow up call to answer the follow up questions we had. Lewis was very professional, friendly and helpful.
Lewis is a professional, trustworthy and knowledgable individual. Thank you for the detailed report which I trust has identified our structural issues and improvement areas. I look forward to doing business with you again if required. Excellent service!
Very professional service with a quick response and report. Highly recommended.
This is an extremely efficient and friendly company,who provide a very competitively priced professional service.I would 100% recommend Lewis Osborne.
Great Experience and service from Tashi Structure. Lewis can explain it in plain English less jargon. Definitely I will be their regular customer.
Lewis was very helpful, friendly and provided the required report promptly. I have no hesitation in recommending Lewis for his expertise in the field!
Great service. Very happy with the end product and advice. Quick to turnaround and great communication throughout. Would highly recommend Tashi to anyone looking for structural calculations. Many thanks
FAQs
Common questions
Do I need a structural engineer?
A structural engineer is typically required where there are concerns regarding the structural condition of a building, or where alterations, extensions or new construction works are proposed. We provide advice for homeowners, purchasers, architects, contractors, developers and commercial clients across a wide range of project types.
What’s the difference between a structural engineer and a surveyor?
Surveyors provide a broad assessment of a property’s overall condition, whereas structural engineers specialise in the performance, stability and integrity of structures. Surveyors will often recommend further investigation by a structural engineer where structural concerns have been identified or where specialist advice is required.
How quickly can you visit?
Site inspections can typically be arranged within a week of instruction. Where timescales are critical, we will always endeavour to accommodate urgent requirements wherever possible.
Can you help if cracks have appeared in my property?
Yes. Cracking, movement and structural defects are among the most common reasons clients contact us. We can investigate the likely cause, assess the significance of any defects observed and provide clear recommendations for any further action required.
Do you work with architects, contractors and developers?
Yes. Alongside residential projects, we regularly provide structural engineering support for architects, contractors, developers, commercial property owners and other construction professionals, from initial feasibility advice through to detailed design and site support.
Can you help before I buy a property?
Yes. We regularly undertake pre-purchase structural inspections for prospective purchasers seeking reassurance regarding the condition of a property or concerns raised by surveyors, lenders or insurers.
Do you undertake commercial projects?
Yes. We provide structural engineering services for commercial, industrial and mixed-use developments, including refurbishments, alterations, fit-outs, change-of-use projects, inspections and technical advisory commissions.
Direct Access. Practical Solutions.
Clients work directly with experienced engineers, benefiting from clear communication, pragmatic advice and a responsive service throughout the life of a project.
Discuss your project
Get in touch to talk through what you need.