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For your house extension project whatever the scope of your building works.


    Include design and build phases for a one-stop solution.

    If you have got the plans drawn up for your house extension already and are looking for a reputable construction Company to undertake the building works for you, then look no further than Lanext Construction. We have been carrying out home extensions for many years so we are able to deal with all sorts of projects from small additions to your living space downstairs to two and even three-storey extensions.

    Equally, if you know what you want but have not yet consulted with a structural engineer, then please bear in mind that we offer a comprehensive design and build service. This will mean taking your ideas and drawing them up into plans that can be submitted to the local authority – where required – to obtain planning consent. Once approved, we’ll build your home extension in a sustainable way, keeping the project moving at all times to ensure you can start enjoying your new lifestyle at home as swiftly as possible


    In London and much of the surrounding area.

    We cover Essex, Hertfordshire, Surrey, and parts of Hampshire as well as carrying out house extension projects throughout the capital. In urban areas, accessing properties can be a challenge, especially when we’re working on terraced houses. That said, we have the know-how to overcome any obstacles we might face to ensure our home extension work is always carried out professionally and with the minimum of disruption. If you’d like a garden room or an orangery extension that you will love, then please get in contact with us for more information.

    • London
    • Essex
    • Surrey
    • Hertfordshire
    • Hampshire

    We can help to extend your home upwards, downwards or outwards.

    We carry out side and rear extensions in much of the Southeast since these approaches to extending properties are often the most sought-after. We can also help with two-storey extensions, adding extra living space to basements or undertaking loft conversions. If you’re extending your property out at the back, then it is also often a good time to consider converting your loft, too, since all the necessary work can take place at the same time. From wrap-around extensions to garage conversions, we do it all.

    Lanext Construction is an experienced building Company that has successfully completed numerous house extension projects, including porches and conservatories, in the past.


    For house extension projects

    Sustainable Materials

    We use sustainably sourced materials for house extensions.

    • FSC wood used
    • Responsible supply chain
    • Insulate your extension
    • Considerate building processes
    • Underfloor heating

    Tailored To You

    Have your house extension built your way.

    • We’ll work with you on design ideas
    • Ask us to quote based on architectural plans
    • Choose the look of materials and finishes
    • Remodel and extend your home
    • Add downlights and wall lights

    Acquire More Space

    With more room in your home, your lifestyle will change.

    •  Add a day room
    • Gain additional bedrooms
    •  Side and back extensions built
    • Loft conversions
    • Porches and outbuildings

    If you would like to understand just how successful some of our past house and bungalow extension projects have been, then take a look at our recent projects.


    Commonly asked questions

    Why choose Lanext for your house extension?

    We have the know-how in taking on home extension projects to ensure your one will be delivered successfully. Whether you want a trusted contractor or a design and build service, we can help.

    How long will a house extension take?

    This will depend on the size of the extension. From digging foundations, it usually takes somewhere from 6 to 10 weeks to build the structure and for a further 6 to 8 weeks to add plumbing, electrics, plastering and so on.

    How close to a property's boundary can you extend it?

    In theory, you can extend all the way to the boundary but it will depend on how high you want to go and how close your neighbour’s house is.

    Will a home extension project add value to my home?

    Yes, it will. So long as you choose a reliable building company, like Lanext Construction, your extension will increase the size of your property, thereby adding to its potential resale value.