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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House Extensions

Congratulations! You have got your Planning for your new extension, so what do you do next?


Simply Self Build Home Extensions


Sunroom extension

If you have not already taken advantage of the great professional services available from our sister company timbertecs now is the time to send us your drawings! If you have then your timber frame estimate will be with you shortly.



Simply sign the form and return them to us with your initial payment and we will do the rest.


Bringing your House Extension to life.


This is where the real fun begins. Simply Self Build will take your drawings and turn these into panellised timber frame. This is a complicated business, which involves architectural, and timber frame designers, structural engineers and carpenters.


conical turret home extension

It will then be manufactured off-site in our factory and delivered in panellised form to your home. Our extension kits are designed and built specifically for you and can be erected by us, by your builder or even by yourself (if you are and experienced carpenter or builder)


Send us your plans and the Simply Self Builds team will help you add value to your home.


Do you have drawings or sketches that you want turned into a set of house plans?


Visit timbertecs the professional services branch of the Benfield ATT Group.


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