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    Home extension

    Home extension made to fit.

    A home extension is the clearest way to add living space without moving. We design and build bespoke extensions that fit your home, plot and daily life.

    No-obligation quoteCalculate costs ->

    BouwGarant · 10-year structural warranty · Response within 24 hours

    Modern home extension with large sliding glass doors

    Benefits

    Designed around your home

    Every extension is tailored to the existing property, structure and layout.

    Fixed price upfront

    You know the budget before construction starts, with clear scope and no surprises.

    10-year warranty

    Structural work and watertightness are covered, with BouwGarant options available.

    • BouwGarant certified
    • 10-year structural warranty
    • Fixed price upfront
    • Response within 24 hours

    About home extension

    Everything you need to know.

    What is a home extension?

    A home extension adds a new ground-floor space to your existing house, usually connected directly to the living area or kitchen and often opening onto the garden.

    Extension or second storey?

    Choose a ground-floor extension when you have garden space and want more living area. Choose a second-storey extension when your plot is compact or you need bedrooms upstairs.

    Materials and style

    We build in brick, timber, render, glass and combinations of these materials, matching the new structure to your home's architecture.

    Planning and timeline

    After quote approval, projects usually start within 6 to 10 weeks. Construction typically takes 6 to 12 weeks depending on size and finish.

    Cost estimate

    Calculate your home extension.

    Process

    From first idea to handover in five steps.

    1. 01

      Request & advice

      Tell us about your plans online or by phone. We call back within 24 hours with first advice.

    2. 02

      Site visit & design

      A specialist visits, measures the space and discusses materials, layout and feasibility.

    3. 03

      Fixed-price quote

      You receive a detailed quote with a clear fixed price and scope.

    4. 04

      Permit & planning

      When needed, we coordinate the permit process and agree a practical construction schedule.

    5. 05

      Build & handover

      Our own craftspeople build the extension and walk through the result with you at handover.

    Client stories

    What clients tell us.

    Read how homeowners throughout the Netherlands expanded their homes with an extension, second storey or conservatory.

    • We twijfelden lang of een aanbouw op ons rijtjeshuis wel haalbaar was. Na het adviesgesprek bleek het gewoon te kunnen. De doorbraak naar de woonkamer was spannend, maar binnen twee dagen dicht. In totaal 9 weken van start tot oplevering, precies zoals afgesproken.

      Familie De Vries

      Haarlem · Aanbouw 18 m²

    • De stalen pui was voor ons doorslaggevend. Aanbouw 24/7 heeft het hele traject begeleid, inclusief vergunning en constructieberekening. De planning schoof één week op door het weer, maar daar werden we op tijd over geïnformeerd. Eindelijk een woonkamer met licht.

      Sophie van Dijk

      Utrecht · Uitbouw woonkamer 24 m²

    • Aanbouw van 16 m² voor een open keuken met schuifpui naar de tuin. We hebben zelf de vloer en het schilderwerk gedaan, dat scheelde behoorlijk. De ruwbouw stond er in 5 weken. Communicatie via een vast aanspreekpunt, dat werkte heel prettig.

      Lisa Bosman

      Amersfoort · Keuken-aanbouw 16 m²

    Frequently asked questions

    Answers to the questions we hear most.