engineering

Shepherd Building Group

Shepherd Building Group is a engineering topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Shepherd Building Group rather than just read about it. In short: Shepherd Building Group Ltd is a family owned business, based in York, that manufactures, leases and sells modular buildings in the UK and Europe. Its brands have included Portaloo and Portakabin, though the latter was sold in June 2024.

Key takeaways

Shepherd Building Group belongs to engineering; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Shepherd Building Group to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Shepherd Building Group from memory before moving on to harder problems.

Reference excerpt

Shepherd Building Group Ltd is a family owned business, based in York, that manufactures, leases and sells modular buildings in the UK and Europe. Its brands have included Portaloo and Portakabin, though the latter was sold in June 2024. The company was one of the largest privately owned building contractors in the UK, but sold that business to Wates Group in 2015.

History In 1890, 35 year old joiner Frederick Shepherd started the business in York. His younger son Frederick Welton Shepherd joined and expanded the firm known, from 1910, as F Shepherd and Son. They diversified from house building to general contracting, and incorporated, in 1924, as F Shepherd and Son Ltd. By the late 1930s there was a workforce of 700 that operated throughout Yorkshire, and also the North East of England.

Main contractor

The firm undertook extensive work at military sites up to, and during, the Second World War. Post conflict contracts were predominantly public sector, often incorporating prefabricated concrete panel systems developed by CLASP, Wates, and Yorkshire Development Group. In 1962, F Shepherd and Son Ltd reorganised under Shepherd Group Ltd, and land was purchased at Huntington. Initially it was used for manufacturing, but in 1995 the headquarters moved there from Blue Bridge Lane, near the River Ouse. The old headquarters site became a Mecca Bingo hall before that too was demolished to make way for the construction of Frederick House student accommodation in 2022. By 1968, the group employed 6,788 staff. That fell to 3,587 in 1971, and by 2009 there were 3,200. Shepherd Group was a main contractor for leisure, commercial, industrial, residential, healthcare, education, retail, and research buildings. The construction division also included companies engaged in mechanical and electrical services, facility management and housebuilding.

Manufactured products

In 1951 Donald Shepherd, grandson of the founder, developed a bulk cement silo, for use in precast concrete construction, as an alternative to paper sacks. They were sold to other contractors, initially manufactured from plywood. He changed the construction to metal in 1953, and diverted joinery shop capacity released to the production of portable, prefabricated site huts. He conceived the need for easily portable site shelters on a windswept construction site at Catterick Garrison. Initially the huts were for the firm's own sites, but from 1961 they were sold to other contractors. He called the silos and cabins Portasilo and Portakabin. Donald Shepherd continued product development in 1966 with the Portablu portable toilet, soon rebranded Portaloo. By 1967 the prefabricated buildings were being used outside of construction, as offices, classrooms, and even operating theatres.

Shepherd Group introduced prefabricated, relocatable buildings under the Yorkon brand in 1980. By 1987 they outsold the portable cabins. A heavily insulated Pullman variant earned subsidiary Portakabin Ltd a Queens Award for Technological Achievement in 1992. By 2009 there were two semi-autonomous, manufactured product divisions of Shepherd Group, distinct from the original contracting, and building service division:

Portakabin, Allspace, Yorkon, Foremans, Konstructa and Portaloo brands of modular buildings and toilets. Portasilo and Portastor, silo and modular products. They were supported by 75 hire centres. The cabins could be found as far afield as Antarctica and Libya.

Disposal of non core businesses

The Portakabin division was consistently profitable. By 2015 the others were not, and directors chose to sell or close them. In January 2015, 80 redundancies were announced at Shepherd Group's silo and modular products division. It was closed in 2019, and the Portasilo and Portastor products discontinued. In May 2015, Galliford Try's Linden Homes subsidiary purchased Shepherd Homes, affecting 60 employees. Later in 2015, Wates Group purchased Shepherd Group's mechanical and electrical services and facilities management businesses, and some of the Shepherd Construction contracts, for £9.8 million. It did not acquire Shepherd's loss making Colindale mixed use development, or take over liability for past contracts. Twelve hundred Shepherd Construction staff transferred to Wates Group. Shepherd Group accounts for 2020 show ongoing costs of £29.3 million in that year, and £19.7 million in the prior, arising from Colindale and other legacy construction contracts. Liabilities for past projects continued to affect Shepherd Building Group in April 2026. Its accounts for the 18 months to 30 June 2025 showed SBG made provisions of £18.6m relating to "historic construction contracts undertaken by the company’s subsidiary companies".

Sale of Portakabin In June 2024, Shepherd Group sold Portakabin to France's Antin Infrastructure Partners for over £1.5bn.

Buildings

Shepherd Construction was main contractor for buildings including:

Controversies

Anonymous emails

In July 2021, Shepherd Group subsidiaries asked the High Court of Ireland for a Norwich Pharmacal order to require Google to disclose any identity information it held relating to a gmail address. The address had been used to suggest Portakabin products did not comply with Irish building standards; were of poor quality, and that named managers were incompetent and dishonest. The claims were derogatory, damaging and untrue. The Court ordered Google to provide Shepherd Group with the requested information.

Hand tool vibration In August 2017, Shepherd Group was served a Health and Safety Executive Improvement Notice because of hand tools causing excessive hand arm vibration at their York site. It complied with the Notice by February 2018.

Domain names In June 2016, Shepherd Group recovered registration of domain name portalooservices.co.uk from Nominet. It had been abusively registered by a third party. In September 2017, Shepherd Group recovered registration of domain name portaloohirebirmingham.co.uk from Nominet. It had been abusively registered by a third party.

Employment blacklist Shepherd Construction Group subsidiary Shepherd Engineering Services subscribed to the Consulting Association's illegal employment blacklist. In 2009, it was one of 14 firms issued with enforcement notices by the Information Commissioner's Office.

… excerpt ends here. Continue reading the full article.

Illustrations

Worked examples

Example 1 — a first encounter with Shepherd Building Group

Start with the simplest possible case. Write down what Shepherd Building Group claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In engineering, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Shepherd Building Group before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Shepherd Building Group ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Shepherd Building Group

In research: Shepherd Building Group appears in engineering research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Shepherd Building Group in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Shepherd Building Group is common in secondary-school and first-year university syllabi. It links to neighbouring topics 1890 establishments in England, British companies established in 1890, Companies based in York, so understanding it makes those chapters shorter.
In everyday life: Look for Shepherd Building Group outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Shepherd Building Group in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Shepherd Building Group means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Shepherd Building Group out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Shepherd Building Group in simple terms?

Why does Shepherd Building Group matter?

Because it connects several engineering ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Shepherd Building Group?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Shepherd Building Group.