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Bespoke Garden Annexes Designed for Modern Living

As experts in designing and building Granny Annexes, we create bespoke steel-frame living spaces tailored to your needs. From planning and groundwork to final handover, we manage every stage of your project with precision and care.

ANX BUILDS

Modular Installation

Design Your Annexe

Highly insulated

Engineered Strength

Prices Starting From

£62,395

See Our Prices

WARM, QUIET & COMFORTABLE

Warm, Quiet & Comfortable Granny Annexes for Year-Round Living

Older family members often feel the cold more during winter months, which is why warmth and comfort are at the heart of every annexe we build.

Unlike many lower-spec annexes on the market, ours are designed for true year-round living. With triple glazing, high-performance insulation and precision-engineered steel frame construction , every detail is carefully considered to create a warm, quiet and energy-efficient living environment.

In fact, our annexes are engineered to match and in many areas outperform the thermal comfort standards found in many modern new-build bungalows.

TRIPLE GLAZING AS STANDARD

Every annexe we build includes high-performance triple glazed windows and doors as standard, helping reduce heat loss, minimise drafts, and create a warmer and quieter home throughout the year.

HIGHLY INSULATED CONSTRUCTION

Our walls, floors and roofs are fully insulated to exceed many modern thermal performance standards, helping maintain a comfortable indoor temperature in both winter and summer.

LOWER RUNNING COSTS

Improved thermal efficiency means less energy is needed to keep the annexe warm during colder months, helping reduce ongoing heating costs and improve long-term comfort.

PEACEFUL LIVING ENVIRONMENT

Triple glazing and insulated construction also help reduce outside noise, creating a quieter and more relaxing space for everyday living.

The result is an annexe that feels less like a garden building and more like a true extension of the family home – designed for comfortable independent living in every season.

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Premium Quality That Feels Like Home

Our bespoke annexes are built to exceed expectations, combining lasting comfort with house-level specifications for warmth, security and everyday living. Unlike standard modular spaces, our homes are designed to feel truly permanent.

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Find Inspiration for Your Garden Annexe

Discover your style with our newly installed Granny Annexes.

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A Garden Annexe for Every Need

As part of our turnkey service, we manage the entire project journey from planning and utilities to installation and interior completion. Our bespoke annexes help families keep loved ones nearby while preserving comfort, privacy, and independence

EXPLORE OUR SERVICES

Premium Steel Frame Granny Annexes Designed For Independent Living

Our innovative steel frame modular construction system, combined with the use of premium materials, allows us to deliver projects that are not only completed up to three times faster than traditional builds but also boast unrivalled structural integrity that will last for many years to come.

WHY CHOOSE US

More Than 'Just' a Garden Annexe, It's an Extension of your home

When comparing options, the difference often lies beneath the surface. While many granny annexes may appear similar, the quality of materials, insulation, and construction plays a crucial role in long-term performance.

We believe a garden annexe should be built to the same standard as a high-quality home. That is why we go beyond basic requirements, focusing on durability, comfort, and craftsmanship that lasts for years.

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Explore Our Completed Annexes

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Exterior Design

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Interior Design

Kitchen Design

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Frequently Asked Questions

At The Granny Annexe Company, we are committed to delivering exceptional quality, precision craftsmanship, and reliable service across every project. As a trusted name in the UK, Granny Annexe Company specialises in designing & building bespoke granny annexes according to your lifestyle & property needs.

As expert granny annexe providers, we manage everything from planning permission to the final build. We specialise in creating bespoke steel-frame granny annexes and independent living spaces designed for comfort, quality, and peace of mind.

Our steel-frame garden annexes are the premium structural choice, offering more durability than standard modular annexes. As a leading annexe provider, we ensure every garden annexe feature house-level specification for security & comfort.

The cost of a granny annexe in the UK typically depends on size, design, materials, and site conditions. We offer fully tailored solutions to suit different budgets, ensuring high-quality construction without hidden costs. Contact us for a personalised quote.

Yes, a professionally built granny annexe can significantly increase your property’s value. It adds functional living space and is highly attractive to buyers looking for multi-generational living solutions.

The timeline can vary depending on the complexity of the design, site conditions, and planning approvals. On average, the full process from initial consultation and design to construction and final handover can take between 8 to 16 weeks. We aim to keep the process smooth, transparent, and efficient at every stage.

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