Our Structural Engineering Services – What We Do

A house under construction.


HLN Engineering Ltd is part of the HLN Group of companies.  For over 50 years we have worked with an ever-increasing list of domestic and commercial clients, providing innovative design solutions to the most challenging of problems.

Comprised of an award-winning team of chartered structural engineers, our customer-focused, multi-disciplinary approach has cemented our position as a market leader – nationwide, we’re the go to practice for home owners and businesses alike.

If you’re unfamiliar with our structural engineering services, read on for an overview of what we do best.

Structural Engineering


Aerial view of an inner city building site


From home owners to multimillion-pound commercial developments, we deliver a value-added service from inception to project completion.


Our talented team of structural engineers are just as at home consulting on a domestic issue or a full-scale multiteam project.

We are on hand to assist with issues such as subsidence & underpinning, party wall disputes and structural detailing.

In addition, we have considerable experience of conducting house inspections for extension and conversion design, as-well assisting clients with the removal of load bearing walls.

Civil Engineering


Birds eye view of the Hoover Dam showing the scale of concrete put into the project.

Hoover Dam at a birds eye view.


Our expertise has led to a number of notable civil engineering projects, as-well as long lasting relationships with household names such as Tesco and HSBC.


Working closely with HLN Group, our chartered civil engineers regularly contribute to large infrastructure projects, designing roads, hard standings and intricate drainage systems.

We are very proud of our involvement in the re-development of Roath Basin and Tiger Bay (Porth Teigr), Cardiff – a huge project centred around the construction of the BBC’s Roath Lock Studios.

Principal Designer


Multi coloured construction hats

Row of multi-coloured construction hats.


We take construction health and safety very seriously…


The introduction of the Construction (Design and Management) Regulations 2015 saw the end of the construction design & management co-ordinator (CDMC), and brought with it a new role – principal designer.

With an in-house team of accredited principal designers, we are on hand to plan, manage and monitor the pre-construction phase of building projects involving multiple-contractors.

Due to our experience and expertise in this field, we have acted as principal designer on a number of high profile projects.

House Extensions


A large house in a wooded area

A large house in a wooded area


Our design teams help domestic clients increase the size and value of their homes


Extremely popular in locations such as London and Cardiff, we provide a wide range of house extension services.

Whether you’re looking to build up (by adding an extra storey) or down (a basement conversion, perhaps?), our in-house design team has the skill and experience to turn your ideas into reality.

Our consultants are available 9-5, Monday to Friday to inspect your home to ensure your plans are feasible.

Loft Conversions


2 houses with dormer windows


A relatively low cost, versatile way of making use of empty loft or attic space


We’re quite fond of loft conversions, one of the least invasive and cost-effective ways of improving your home (and one of the most popular structural engineering services we offer).

We’re experts in designing all styles of conversion, in-particular dormer, Velux, mansard and hip-to-gable.

The options are seemingly endless: check out our blog on loft conversion ideas for inspiration

Working closely with our clients, we ensure design plans are delivered on time and within budget.

Beam Design


Wooden ceiling beams


Beam design – one of the most critical building design elements


Working with timber, steel, concrete and reinforced concrete, we provide structural calculations and beam design specifications for a wide range of building projects.

Our experience in this discipline is extensive and we regularly submit designs for all beam types.  These are:


  • Simply Supported Beam;
  • Fixed Beam;
  • Cantilever Beam;
  • Continuously Supported Beam



Water drains in a waterway by a lush landscape


One of the most important innovations in history…


There’s no denying the importance of good drainage, yet it’s something we all take for granted.

Expert drainage consultants and design engineers, we design intricate drainage systems for large scale industrial works and consult on domestic drainage issues across the UK.

One of our greatest achievements was the design and implementation of sustainable drainage techniques for the Nottingham Waterside regeneration scheme, as part of a flood-risk assessment carried out on behalf of ISIS Regeneration.

Our use of SUDS (sustainable drainage systems) was key to the sustainable design requirements of the landmark CUBRIC building in Cardiff.


A Wide Range of Structural Engineering Services


This is just a brief overview of what we’re capable of – be sure to visit each of our service pages for more information on the wide range of structural engineering services we provide.

Whether you’re thinking of extending your home or require civil engineering expertise for a large industrial project, get in touch today via our contact page.

Here you will find the address and contact details for our head office and regional offices across the UK.

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