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A loft conversion is an excellent way of adding space and value to your home.

A well designed loft conversion can add up to 20% to the value of your property.

It is often a much better idea than moving to a larger home when additional bedrooms / space is needed as it avoids the upheaval & expense of relocating whilst also adding value.

Loft conversion


"I've been producing planning application drawings & building regulation drawings for loft conversions for over 20 years for buildings of all types of construction & for people with various types of needs and budget.

I will happily meet with you at the property to inspect the roof space & assess the feasibility of a loft conversion in terms of space, the structural alterations that you'll need and budget available"

"Upon proceeding with the planning drawings you may have an idea of the type of construction & layout you'd like to have, as well as this I will always draw out other layout alternatives (at no additional charge) to put other ideas into the mix, quite often I find clients use a mix of their own ideas and mine to create a design they are delighted with.

Needless to say I won't settle than anything other than 100% client satisfaction on the design that is submitted for planning"


Concept 20 believes in providing extremely thorough building regulation and construction drawings and details, much in excess of what Architects usually provide for a loft conversion drawing package.

The additional detail makes the whole design, build & approval process much more simple for all of the parties involved:

Loft conversion southampton

Less queries from Building control as more aspects are covered with large scale drawings rather than notes

Loft conversion plans

A more accurate quote from builders. Less assumptions will need to be made due to the extra detail. There is far less chance of being hit with additional building fees for 'Something that wasn't in the quote'

loft conversion architect

Much easier job for the Structural Engineer. I make sure to look at the structural design myself  & ask the structural engineer to justify my proposals, other architects usually leave all of the structural design to the engineer which costs you extra time and money.

Loft conversion southampton

Less queries from builders on site as to how an element of the building is to be constructed due to a higher amount of large scale construction details.

Despite the additional detail, my fee's are no higher than what a typical Architect would charge for building regulation drawings!


Loft conversion to semi-detached property to create new bedroom, ensuite & roof dormer

Loft Conversion Hampshire

Amilie Zhang

Loft conversion to semi-detached property to create new bedroom, ensuite & roof dormer to semi detached house in Steeple Claydon

Work Undertaken:
Loft conversion to semi-detached property to create new bedroom, ensuite & roof dormer

Loft Conversion Southampton

Mr Chris Wilton

Work Undertaken:
Planning Appilcation & Building Regulation Application for loft conversion to semi detached house, Hamble

“I hired John to plan a loft conversion at my house. I had no experience doing this kind of thing before and he was amazing. He came round, discussed potential options and clearly explained how the process would work. His drawings for both planning and building regs were all very precisely detailed and he came up with some really creative ideas to utilise the space, while keeping costs down. Very professional, knowledgeable and easy to get along with, I would recommend his services to anyone and will definitely use him again myself for any future projects!”

John did the drawings and plans for our loft extension. I was incredibly impressed with his dedication to making sure all measurements were accurate, and details thorough, the drawings were second to none and absolutely gorgeous.
He was also really helpful and knowledgeable in regard to what was needed to meet planning permission and building regs, The drawings were incredibly personalised to meet our needs, as we didn’t want a typical dormer, but sash style windows that would let a lot of light in. John made sure to make maximum use of space, giving us as much window as possible while still meeting the requirements for planning. We are incredibly grateful for his personalised and creative approach.
The extension is aesthetic and practical. Thank you so much John!

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