
Mark Stevenson
Mark Stevenson is a construction professional with almost 35 years’ experience across housebuilding, timber systems manufacturing and bespoke residential development. He is the owner of Elsworth Projects Ltd, a consultancy specialising in the project management of bespoke self-build homes.
Previously Managing Director of Potton and former Chair of NaCSBA and the Structural Timber Association, Mark is widely recognised for his specialist knowledge of timber construction, land finding and appraisal, and the construction of self-build projects.
Alongside his professional career, Mark is a skilled joiner, hands-on renovator and serial self-builder. He regularly shares his knowledge at Homebuilding & Renovating Shows and coaches self-builders.
Latest articles by Mark Stevenson

Changing your bathroom lights? These are the bathroom lighting regulations to know before you start
By Mark Stevenson published
Our expert talks through all the lighting regulations for bathrooms to make sure your project is not only compliant – but also safe

How much is too much insulation? An expert explains the ideal amount
By Mark Stevenson published
You might think adding extra insulation is always a good thing, but – as our expert explains – this isn't always the case

Could the 'LEGO' of the homebuilding world be the right system for you? What to know about insulated concrete formwork
By Mark Stevenson last updated
Fast, efficient and highly insulated, could this innovative build system be for you? Our build expert reveals the pros and cons of insulated concrete formwork

Building with structural insulated panels — everything you need to know if you're considering it for your self build home
By Mark Stevenson, Allan Corfield last updated
Structurally strong, excellent for airtightness and quick to build, could a structural insulated panels construction method be the right one for your project?

What loft conversion fire regulations do I need to know? Our self build expert explains
By Mark Stevenson published
We explain how to make sure your build complies with all the fire regulations concerning loft conversions

What is Approved Document K? How your windows, balcony and stairs must comply with these regulations
By Mark Stevenson published
Our self build expert explains what design features are needed to ensure your windows, balcony and stairs comply with Part K of the building regulations

Change of use — 'How we turned designated commercial land into a residential plot for a family home'
By Mark Stevenson published
If you've found a plot but you need to apply for change of use, building expert Mark Stevenson explains what's involved and how he successfully obtained permission to do just that

What is Approved Document P? The building regulations you need to know when electrical work is involved
By Mark Stevenson published
Our build expert, Mark Stevenson, takes a deep dive into the building regulations covering electrical work during a self build, renovation or extension

What is Approved Document A? The building regulations to know for the structure of your build
By Mark Stevenson last updated
Approved Document A is designed to ensure the structure of a building is safe. But what does it check and how do you ensure you meet the requirements?

Do you need loft conversion fire doors? Our expert gives his advice on which doors to choose
By Mark Stevenson published
Our self build expert explains why getting your doors right for a loft conversion, is more than just a style choice

6 things about loft conversion window regulations you need to know before extending upwards
By Mark Stevenson published
Our build expert takes you through the key regulations you need to consider when choosing which windows to add to your loft conversion

I'm a building expert and am often asked 'what are the best ways to insulate your home?' Here's my top 6 recommendations
By Mark Stevenson published
The best ways to insulate a home mean choosing the right materials for maximum efficiency. Building expert, Mark Stevenson, shares his top tips

'We took a huge risk buying a plot with refused planning permission' – our self-build expert shares this tricky journey and why he'd do it all over again
By Mark Stevenson published
Self-build expert Mark Stevenson shares his own plot-finding journey from start to finish

Can you convert a loft with a low roof? Yes, says our build expert, providing you opt for one of these solutions
By Mark Stevenson published
Self-build expert Mark Stevenson talks through your options for converting a loft with a low roof to ensure you have adequate head height

Is your new front porch legal? These are the rules you need to follow so you don't get caught out by porch building regulations
By Mark Stevenson published
It's easy to assume a porch won't need building regulations approval, but our building expert explains why taking the risk isn't worth it

Ignore these 12 red flags at your peril if you're on the hunt for the perfect plot
By Mark Stevenson published
Buying a plot? While it may feel like you've found the perfect spot, if you dig deeper and find any of these red flags – it could be time to walk away

Can you build a house on agricultural land? Sometimes says a self build expert, but here's why it can be a bit tricky
By Mark Stevenson published
A self build expert details what you need to consider if planning to buy farm land to build on, including if and when it is possible

Should I build a house in a flood zone? A self build expert explains whether or not it's a good idea
By Mark Stevenson published
We look at how to go about building a house in a flood zone, how to identify if you may be at risk and if it's ever a good idea

Garage conversion roofing changes you might need to make when adding new living space
By Mark Stevenson published
Self build expert Mark Stevenson talks through what might need to be done to your garage roof when planning a garage conversion

Need more living space but don't want to lose storage? Why a half garage conversion might be the solution
By Mark Stevenson published
Our expert explains what converting only half your garage involves and why it can be a good idea

When do garden wall building regulations apply? Our expert explains what to know
By Mark Stevenson published
Self build expert Mark Stevenson explains how size, location and type of wall will determine if approval will be needed or not

Is my garage exempt from building regulations? When you need them and when you don't
By Mark Stevenson published
Our expert explains the regulations that you must comply with if building a garage, including foundations and insulation requirements

The garage conversion building regulations you need — even if your build falls within permitted development
By Mark Stevenson published
Our self build expert explains which regulations apply as well as how to get your garage conversion signed off
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