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Home / House Extensions / Hertfordshire

House Extensions in Hertfordshire

Professional house extension across Hertfordshire — free survey, fixed written quotes and guaranteed work.

Looking for house extension in Hertfordshire? S&K Property Investments & Improvement is a trusted local team covering Hertfordshire and the surrounding area.

We keep sites clean, schedules honest and communication clear from start to finish. A well-built extension adds space and lasting value to your home. We handle the whole job — design and drawings, building control and party-wall sign-off, foundations, structure and a full finish — so you deal with one accountable team from first sketch to final decoration.

Our house extensions service in Hertfordshire includes

  • Free measured survey and design advice
  • Architectural drawings and building-control sign-off
  • Foundations, brickwork, steelwork and roofing
  • Plastering, electrics, plumbing and decoration
  • Party-wall and structural calculations arranged
  • Fixed written quote — no day-rate surprises

Every extension starts with a free site survey and a fixed, itemised quote. We manage structural calculations, steelwork and building regulations throughout, and keep the site clean and the schedule honest. The result is a room that feels part of the original house, not bolted on.

House extension across Hertfordshire

We carry out house extension throughout Hertfordshire, including Watford, St Albans, Hemel Hempstead, Stevenage, Hatfield, Welwyn Garden City, Cheshunt, Bishop's Stortford and the surrounding villages.

WatfordSt AlbansHemel HempsteadStevenageHatfieldWelwyn Garden CityCheshuntBishop's StortfordHitchinLetchworth

House Extensions in Hertfordshire — FAQs

Will you manage building control?
Yes. We arrange structural calculations, submit to building control and see the project through to a completion certificate.
Do I need planning permission for an extension?
Many extensions fall under permitted development, but larger or two-storey projects often need planning. We check this for you and handle the application if required.
Will you manage building control?
Yes. We arrange structural calculations, submit to building control and see the project through to a completion certificate.
Are you local to Hertfordshire?
We are a West Midlands-based company covering Hertfordshire and the wider region, so you get a responsive local service backed by a full team.
Is the quote for house extension in Hertfordshire free?
Yes — we provide a free site survey and a fixed, itemised written quote with no obligation.

Call 0800 088 6341 or request a free quote online and we will get straight back to you.

House Extensions in Hertfordshire?

Call 0800 088 6341 or request a free survey and a fixed written quote for your house extension project in Hertfordshire.

Call 0800 088 6341Request a quote
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