House Extensions in Bristol and the South West

Common House Extensions We Build

Before we jump into specific styles, it’s important to know one thing: not every extension suits every house. The shape of your property, the available land, your budget, and your planning constraints will all shape the best route forward.
At LenexBris, we don’t just copy-paste solutions; we design around your life and your property. Below are the most common types of house extensions we build in Bristol and the South West, each with its own strengths depending on what you want to achieve.

Single Storey Rear Extension
Perfect for opening up older layouts and connecting your home to the garden, these extensions typically create large open-plan kitchen-diner spaces that transform the ground floor. With skylights, bi-fold doors, and modern insulation, you get more natural light and better thermal performance. They’re the most popular option in Bristol for a reason, low disruption, high impact, and no stairs required.
One of the fastest, most cost-effective ways to increase both usable space and property value without disrupting the entire house, and planning permission is often not required.

Double Storey Extension
Need serious space? A double-storey extension can give you an extra bedroom and bathroom upstairs while expanding your kitchen or lounge below. It’s ideal for growing families or homeowners who want to future-proof the property. Yes, they take longer and cost more, but the value added to both liveability and resale is huge. And with our project management, it won’t turn into a year-long nightmare.
When done well, a double-storey extension can unlock serious long-term value, often adding 20–30% to your home’s market value while giving you the flexibility of a completely rebalanced floor plan.

Side Return Extension
This one’s a game changer for narrow Victorian terraces and semi-detached homes. That wasted alley down the side of your kitchen? We convert it into real, usable space with proper lighting, drainage, and heating. Done right, a side return doesn’t just widen your home, it makes the entire layout feel balanced and brighter. It’s subtle from the outside, but life-changing inside.
It’s the ideal option when you don’t want to extend outward into your garden but still need more space, especially for period homes with awkward layouts.

Wraparound or L-Shape Extension
Looking to max out your footprint? An L-shape extension (side return + rear) gives you a large, zoned space perfect for kitchen-diner-lounge setups. It’s one of the more complex builds, involving structural steelwork, drainage upgrades, and planning approvals, but the transformation is dramatic. This is the go-to solution for clients who want open-plan living done properly, not pieced together.
This is the most ambitious extension for standard residential homes, but it offers the biggest lifestyle shift, seamless transitions between cooking, eating, relaxing, and entertaining.

Kitchen Extensions
When your kitchen doesn’t work, nothing in the house flows. We design kitchen extensions that aren’t just about aesthetics, but layout, function, and long-term use. From structural walls and extraction to smart lighting and integrated appliances, we build around how you cook and live, not just how you want it to look. We’ve built dozens of kitchen extensions in Bristol homes, and no two have ever been the same.
Done right, a kitchen extension becomes the heart of your home, improving daily life, boosting energy efficiency, and becoming the feature future buyers will pay a premium for.

No two homes or homeowners are the same. That’s why we always start with a detailed site visit and planning conversation before recommending any particular type of extension. Whether you want more space, more light, or a better layout, we’ll guide you to the smartest, most cost-effective design for your property.
Every extension we build is tailored, permitted, and built to last.