Building ideas into reality

Extensions and New Build


Concept Construction of Harpenden have many years of experience in domestic Extensions and new builds all around Hertfordshire and North London.


Whether it a small single story garden room through to large two story more complex projects you can feel safe in the knowledge that we have the experience and skiils to provide a first class job. We offer a planning service with full consultation to gain the best possible outcome from all developments. With a wealth of ideas the possibilities are endless and our creative designers are there for you every step of the way.

However, you may have your own ideas already through planning – again we are more than happy to accommodate this. All clients can use as much, or indeed as little, of our service as suits them.


We have many years experience undergoing projects in occupied properties and ensure that each and every tradesman understands the needs of the client. They are hand picked to ensure they are clean working well mannered and courteous at all times and, of course, they are overseen by your Project Manager.


Call 01582 620994 or 07960 993344 for you free no obligation consultation.

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Why Concept Construction

• Your one stop shop from design through to completion.

• Professional, reliable and friendly service.

• 100% dedication to quality.

• Many years experience in all aspects of building.

• Dedicated Project Manager.

• All work guaranteed and insured

• Creative Design Team.

• Fully qualified Tradesmen.

• 80% of our work comes from recommendation.

• Big enough to cope small enough to care.

• Free no obligation initial deisgn and consultation.