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Home Extensions in Hertfordshire

If you’ve outgrown your home’s existing living areas and a conservatory isn’t the right fit for your home, we also offer made-to-measure home extensions across Hertfordshire and beyond as part of our extension buying process. So you don’t even need to consider moving! Whether you wish to extend your home to accommodate a new family room, kitchen extension, or just to enlarge your floorplan for more comfortable living, this is the ideal solution to transform how you use your home.

What are home extensions?

Put simply a home extension is exactly how it sounds. An expansion of your home that will meld with the current exterior and interior, feeling like it’s always been there. Of course, if you want it to stand out, we can customise it to your exact specifications. Not only will it really elevate your home, but it will also add significant value to your home; extensions typically offer a return on investment of around 12% of the property value when sold, making extension prices even better value for money!

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    High performance roof options for your home extension Hertfordshire

    The beauty of home extensions is that they can seamlessly add to with your home's current exterior, making the additional living space look like it has always been a part of your property. With both tiled and glass roofs available for your extension, we can design the perfect solution to match your home.
    Tiled roofs are available in a number of attractive colours and finishes, so you can be sure to find the right option for your extension. Not only are they incredibly robust and resistant to the harsh weathers with their fully-insulated designs and weatherproofing tests, but they also offer excellent thermal capabilities. This will keep your extension a comfortable temperature 365 days of the year.
    Glass roofs will enable you to instantly brighten up your new extension, without compromising on its energy efficiency or security. Our high-performance glazing boasts self-cleaning abilities and solar cleaning that repels the sun’s rays when it reaches an optimum temperature inside. You can choose from a range of decorative finishes and beam features to flourish your new roof to truly make it your own.

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    Red brick extension with a tiled roof
    A livinroom lean-to extension.

    Experts in home extension planning permission

    All of our home extension builds are individually project managed, offering you a smooth-running build from start to finish. Our highly trained team of architects, installers and extension experts will work with your individual requests from the initial home survey, bespoke design process, right through to our aftersales care. If planning permission is required, we will sort all this out for you, promising a stress-free home extension solution for any homeowner in the Southeast of England.

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    Reduce your energy bills with a house extension Hertfordshire

    Not only will a modern house extension let your family enjoy more desired space in your current home, but it can also reduce your energy bills due to its innovative thermal capabilities. We incorporate fully-insulated walls and pioneering under cladding in our extension builds, meaning they’ll absorb the sunrays from outside during the cooler months, without letting the draughts enter.

    Our advanced glazing can achieve incredible A-rated window energy ratings; the dense glass panels that encompass argon gas will retain the interior warmth, whilst letting the cold escape. Our high-quality range of award-winning windows and doors can be included in the extension design, providing additional energy efficiency benefits with their innovative manufacturing that will not only improve your carbon footprint, but add kerb appeal to your home.

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    Single storey extension interior view
    large kitchen extensionA double ultraroof home extension.Eden house orangey.

    Types of Home Extensions Hertfordshire

    • Wraparound Extension: This extension wraps around two sides of your house, usually the side and rear. It's fantastic for opening up corners of your home to create large, open-plan living spaces that completely transform a property. This type of extension can significantly increase your living space and could raise your house value.
    • Rear Extension: This is an extension to the back of the house, which might create a larger kitchen or living area. It's perfect for connecting the interior of your house to the garden area, especially if you use large patio doors or a conservatory design. The key benefit is the additional living space without much disruption to the rest of your home.
    • Side Return Extension: This extension fills in the alleyway at the side of the house (common in Victorian terraces). It's great for turning a narrow kitchen into a large kitchen-diner. It maximises the width of your house without sacrificing too much garden space.
    • Over-Garage Extension: This involves creating a new room or suite of rooms above an existing garage. It can add considerable living space without altering the fundamental footprint of the house. It's an effective way to utilise space, especially if you don't regularly use the garage for parking vehicles, and can provide a great area for a home office or guest suite.
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    What is the alternative to a conservatory?

    If you're looking for an alternative to a conservatory, there are several options to consider, depending on your needs and budget:

      1. Orangery: An orangery is a more substantial structure than a conservatory and is designed to be a more permanent extension to your home. An orangery typically features brick or stone pillars, a solid roof with a glazed lantern, and large windows.
      2. Extension: An extension is a great option if you need more living space in your home. It can be designed to blend in with the rest of your house and can be tailored to your specific needs.
      3. Sunroom: A sunroom is a type of extension that is typically made entirely of glass, offering great views of your garden while providing shelter from the weather.
      4. Loggia: A loggia is an outdoor space that is enclosed on one or more sides by arches or columns. It provides shade and shelter while still allowing you to enjoy the outdoors.
      5. Garden room: A garden room is a detached structure that can be used for a variety of purposes, such as a home office, gym, or guest accommodation. Garden rooms can be designed to blend in with your garden and can be fully insulated for year-round use.
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    Flat roof extension with roof lanterns
    An internal view of a contemporary orangery

    Most popular home extensions in Hertfordshire

    • Garden Rooms: Increase your home’s appeal in Hertfordshire with our bespoke garden rooms, creating a seamless connection between your indoor and outdoor spaces, perfect for any use year-round.
    • Orangeries: A luxurious addition to your property, blending classic design with modern aesthetics, our orangeries provide the perfect blend of extra space and natural light, enhancing your home’s value and beauty.
    • Conservatories: Transform your home with our stunning range of conservatories, offering a sleek and elegant extension solution that promises to bring the outdoors in, while providing additional, versatile living space.
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    Our Order Process

    1. Contact Us for Expert Advice: Reach out to us through our contact form, call us at 0800 666 444, or visit our double glazing show centres across the South East UK. We’re here to guide you on planning permission, energy ratings, and the best materials for your home.
    2. Get Your Free Quote Fast: After we gather your window specifications, either by visiting your home or via communication, expect a no-obligation quote from us within 24 hours to help you make an informed decision.
    3. Efficient Installation Process: Once your order is confirmed, our smooth process kicks in, starting with a detailed survey, progressing through manufacturing with the latest techniques, and culminating in the installation of your new double glazed windows by our skilled team, followed by a final check to ensure everything meets your expectations.
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    A man standing outside of his SEH BAC Double glazing installer van.
    South east home gets stunning open plan extension

    10 Year Guarantee

    Our home extensions are crafted with the highest quality materials, ensuring they maintain their functionality for years. We stand behind our craftsmanship with a ten year guarantee, offering peace of mind and assurance in your investment. This commitment reflects our dedication to exceptional workmanship and customer satisfaction.

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    Your Conservatory Journey with SEH BAC

    Getting a new conservatory installed is a big decision. That’s why we make the process as straight forward as possible for you.

    01

    Choose the right conservatory

    Fill out a form online or visit one of our 10 showrooms where one of our team of experts are on hand to help you design your dream conservatory and offer any advice. After we create your design we will visit your property to measure up and provide you with a free no-obligation quote.

    02

    Place your order with us

    Once we’ve confirmed the final conservatory design, including decorative features, paired windows and doors, and roofing options, we’ll confirm and approve your order. Once we have received your order deposit, our administration team will provide your contract to a surveyor.

    03

    Your surveyor assessment

    Our surveyor will contact you to arrange a convenient date to come to your home and review the project and take accurate measurements before we confirm the assessment. If a trial dig is required to determine the footings of your conservatory, we will arrange to carry this out.

    04

    Pre-site check and confirm an installation date

    Our technical department will advise on whether planning permission is required and, if it is, our team will take care of this. Your designated project manager will contact you to arrange a pre-site check to finalise all of the specifics required before agreeing the dates for your installation.

    05

    You're ready for your installation

    Our conservatory installers will arrive at the arranged time to begin work and will ensure as minimal disruption as possible. They’ll advise on maintenance tips for your new conservatory, and the functionality of the integrated windows and doors. Once your installation is complete, we will contact you to confirm that the project is finished.

    Frequently Asked Questions

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    Get your free quote – with no-obligation to buy. Simply fill in the online contact form below to get started:







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      Here at SEH BAC, we’re proud to have won many prestigious awards for our products as well as our work in the community:

      Installer awards 2022
      G21 Finalist
      SEHBAC showroom winner
      Ultraframe designer winner
      Conservatory and orangery awards winner 2019
      NHIC 2018 Consumer confidence award
      G17 Installer of the year
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