ISO 14001:2004 The Simply Self Build's factory holds international environmental certification for dry timber structures SGS - Society General de Surveillance ensures that quality systems and procedures are used in the design, manufacture and erection of your engineered timberframe structure is of the highest standard FSC Forest Stewardship Council - FSC timber frame certification. TimberTecs part of the Benfield ATT Group hold chain of custody certification for the design, sale, manufacture and distribution of engineered timber structures - FSC endorsed by Greenpeace, Friends of the Earth and WWF and Forestry Commission Investors in People, TimberTecs members of the Benfield ATT Group are one of the few timber frame companies to hold an award for the training and ongoing development of their people and service. Green Dragon: The only dedicated professional service provider in the UK to hold Welsh Environmental Quality Standard Award   Examples of timber frame homes

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Whether you are building up out or down extending your home is a great way to add equity, gain extra space and get the home you want without the hassle of moving.

Home Extensions

Home Extensions for Self Builders

Simply Self build offer a range of ways to extend you home – giving you that extra bedroom, home office or larger kitchen you have always wanted. The great thing about home extensions is you do not have to move away from the family and friends you have established and you will always be adding value to your existing property.


There are many ways of extending your home. When most people think of extensions they think of adding an extra room on the back or end of your existing home. However extensions can be single storey outward extensions, multi storey extensions increasing floor space on all floors of the existing building, a simple loft conversion or the increasingly popular method of extending upwards, where you effectively remove the existing roof and add a whole new floor to the building.

Two storey extension kit


Extending Your Home


Simply Self Build have gained a reputation as the UK’s experts in building upwards and have even been involved with some penthouse developments however our favourite customers are people like you.

We know you need more space, we know this is your home and we want you to make the most of it.

So whether you are extending into the garden, converting your roof, extending up by adding an extra storey or looking at any other method of home extension Simply Self Build is the place to start.


Upwards Extension Up

What do you want to do now?

I need help with the house plans for my extension

I need help to get planning for my extension

I need help with building regulations for my new extension

I am extending upwards

I am extending into my garden

I need a quote for my timber frame extension


Chartered Building Consultancy - timber frame, OSM (off-site manufacture) and engineered timber structure advisors. Timber Research and Development Association – our work with TRADA ensures high quality, eco-friendly engineered Timber Frame build projects. The Green Register of Construction Professionals - Simply Self Build members of the Benfield ATT Group - Simply Self Build's membership demonstrates our passion for environmentally sustainable timber frame self builds for local housing authorities. AECB - Association of Environment Conscious Building – our FSC certified timber frame is endorsed by The Ecology Building Society Impact Upon Society Big Tick Award from Business in the Community – BITC – award-winning timber frame company within the Timber-frame industry TRA - Trussed Rafter Association – our membership assures Timberframe Trusses, Trussed Rafters, roofs and complex and innovative roofscapes are quality HBF - the only developer partnering timber frame company to be members of the House Builders Federation. Wales Quality Centre – members and committee members, we ensure the highest quality, especially when coupled with ISO 9001, FSC certification and Q-Mark Plus standards RICS - Royal Institute of Chartered Surveyors, assures our customers of our professionalism in wood and timber frame building and developing and surveying
Simply Self Build is part of the Benfield ATT Group.
Chain of Custody TT-COC-1928. FSC Trademark (C) 1996 Forestry Stewardship Council