Services · Home extensions

Home extensions in Hertfordshire

An extension adds space and value without the upheaval of moving. We manage every aspect of the project, from initial consultation through to final completion.

Single-storey extensions

The popular choice for extra ground-floor space: bigger kitchens, new dining areas, open-plan living. Designed to make the most of space and light while keeping the character of your property.

  • Kitchen and dining extensions
  • Open-plan living spaces
  • Designed around natural light

Double-storey extensions

A significant increase in living space for growing families — extra bedrooms, bathrooms or office space — maximising the property's footprint without giving up the garden.

Rear extensions

Larger kitchens, family rooms and living areas that open onto the garden, with layouts designed around how you actually use the ground floor.

Wraparound extensions

Rear and side extensions combined into one large, versatile space — the most flexible way to completely rework a ground floor.

Garage conversions

One of the quickest and most cost-effective ways to add usable living space: home office, gym, studio or guest room, usually without major structural change.

FAQs

Extension questions

Do I need planning permission for a home extension?

Not always — many extensions fall under permitted development. It depends on the size, height and position of the extension and your property's history. We'll advise on your specific project during the consultation.

How long does a home extension take?

As a guide from past projects: single-storey extensions typically take one to three months, and multi-storey extensions four to nine months, depending on scope. You get a detailed timeline with your quote.

Can you match the extension to my existing property?

Yes — matching brickwork, rooflines and finishes to the existing building is part of the design work, so the extension looks like it was always there.

Will I need to move out during construction?

Usually not. Most extension projects are staged so you can stay in your home while the work happens.

More from STW

The other trades

  1. Plastering

    Skimming, dry lining, ceilings and repairs.

    About plastering
  2. Rendering

    External render systems, repairs and maintenance.

    About rendering
  3. Building services

    Renovations, structural alterations, brickwork and maintenance.

    About building services

Thinking about extending?

Tell us what you're hoping to do with the space and we'll talk through what's realistic — then quote it properly.

Free quotes · Managed from start to finish