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A modern flat roof extension in Ipswich, Essex and Surrey

Are you dreaming of a contemporary extension with a seamless open-plan living space that simply flows? Fully compliant with the latest Building Regulations, robust enough to withstand the harshest weather, efficient, and aesthetically striking, our modern flat roof extensions are at the cutting-edge of chic architectural design. Enhancing both new and traditionally styled homes like no other, each SEHBAC flat roof extension is built and project managed by our experienced team of experts to bring your unique vision to life.

What is a flat roof extension?

Available in a number of square or rectangular sizes to suit your individual project, our Flat Skylight is designed to deliver maximum, uninterrupted sightlines whilst flooding the space with warming natural light. Fusing cutting-edge technology with minimalist charisma, these fixed seamless skylights sit flush (flat) to the internal plasterboard, creating a fabulously frameless appearance inside and a modern, streamlined exterior. Our modern flat roof extensions also make the ideal accompaniment to traditionally styled properties seeking classic elegance with a statement-making pitched lantern roof option. Combined with a plethora of bespoke design options, any look can be achieved, and any style of property can be enhanced with an SEHBAC flat roof extension.

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  • Rooflight Options
  • Soffit Options
  • Fascia Options
  • Advice + Guidance
  • Rooflight Options

    A flat roof.

    A flat roof.

    Flat skylight roof light option

    Flat skylight roof light option

    Lantern roof light option

    Lantern roof light option

    Soffit Options

    Small soffit option

    Small soffit option

    Medium soffit option

    Medium soffit option

    Large soffit option

    Large soffit option

    Fascia Options

    Classic fascia option

    Classic fascia option



    Parapet fascia

    Parapet fascia

    Advice + Guidance

    The strongest & warmest flat roof extension available

    Adding the ultimate contemporary 'wow' factor time and time again, you can count on an SEH BAC flat roof extension for durability, longevity, and outstanding thermal insulation too. Depending on the amount of glazing it contains, a modern flat roof extension can considerably reduce your energy bills. Able to achieve outstanding U-values as low as 0.14W/m2K, the roof lantern incorporates thermally broken aluminium sections; delivering the look of a classic orangery without ever having to compromise on present-day efficiency.

    Prepared for the worst of the weather, its strength shines through the fact it can span up to 5.8m above slimline bi-fold or sliding doors without costly and unappealing additional support. It also has a pre-manufactured ‘fall’ system to ensure water drains away efficiently.

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    Lantern roofs
    Flat rooflight on an extension

    A range of 'fast-fit' flat roof options for your new extension

    Contemporary ‘edge-to-edge’ flat skylights are a firm favourite with modern styled developments, as well as those that seek greater privacy without having to compromise on natural lighting. Whilst our beautifully pitched lantern roof extensions create an unforgettable statement in heritage, period, and more traditionally styled households in Essex and the Southeast.

    With limitless designs and finishing touches available, we can work with your personal requirements to build a flawless flat roof extension solution that exceeds all expectations.

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    Available in a number of square or rectangular sizes to suit you

    Ideal for a new kitchen extension, as well as modernising existing extension spaces, our flat roof extension design process will guide you through each step and make you fully aware of the range of high-quality design choices available.

    Personalized in a multitude of alluring colour choices and finishes, for a really contemporary appearance, go one step further with an extended internal plastered soffit system*, a modern overhang on the roof to shelter the doors, and level external flooring options to seamlessly flow from the inside to the outside with the utmost ease and finesse. Perfect for those with 'Grand Designs' in mind, it can also accommodate extra-large roof lights up to 23m².

    *Available in small, medium, or large, a soffit is a horizontal architectural feature built lower than the area around it. Its purpose is to conceal light fittings and speakers, it adds stylish character to any extension.


    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.


    Choose the right conservatory

    Fill out a form online or visit one of our 11 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.


    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.


    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.


    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.


    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.

    Begin Your Project

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

      By submitting your details you confirm that you agree to the storing and processing of your personal data by SEH BAC as described in the privacy statement.


      Get inspired with our product brochures

      Ready to make your dream home a reality but don’t know where to start? Find all the inspiration you need.

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      Multi-award winning company

      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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      We’re one of the largest

      regional retail companies

      Vetted for professionalism, competency & compliancy

      Improving South East homes for more than 50 years

      With 9 show centres across the South East, you’re not far away from achieving your dream home:

      See all of our show centres

      Our Accreditations

      BSI ISO 9001:2015
      BS 7412
      FENSA Approved
      TSI Approved Code
      Ultra Installer
      QA National Warranties