As families evolve, many homeowners consider converting part of their property to accommodate elderly parents or adult children. A purpose-built annexe with the best modular extension offers the ideal solution for private, energy-efficient, and connected living.

Vergolus, the leading modular extension specialists across the UK, offers bespoke, high-quality, and cost-effective solutions ideal for multi‑generational living. Whether you’re thinking of a 3 metre rear extension, a side-return module, or simply an affordable house extension, a modular build could be the perfect answer.

We Provide the Best Modular Extensions for Multi‑Generational Living

Speed and Minimal Disruption

Modular builds are prefabricated off-site and swiftly installed—often in just a few weeks—meaning your family experiences far less disruption. This is ideal if you’re preparing a space for ageing relatives or a newly graduated child needing housing swiftly.

Full Customisation for Family Needs

Each modular annex can be tailored with:

• Independent self-contained layout (bedroom, bathroom, access)

• Open-plan kitchen-diner for family interaction

• Disabled-access features (wider doors, level thresholds)

• Underfloor heating and smart home tech for enhanced comfort

Affordability and Accurate Budgeting

Traditional extensions with hidden costs—from labour delays to unexpected works—can inflate budgets. Vergolus modular solutions are clearly priced and fixed, making them an affordable house extension option that families can plan around confidently.

The Best Modular Extension Options for Families

3 Metre Rear Extension

A compact yet effective solution. Ideal for adding a complete flat beneath or alongside your main house. It fits into many UK gardens and often falls within permitted development limits.

4 Metre Rear Extension

A generous option ideal for creating expansive open-plan living or multifunctional family spaces. While detached homes may extend up to 4 metres under permitted development, anything beyond that will usually require planning permission. Always check with your local planning authority, as PD rights can vary, especially for new builds or homes in conservation areas.

6 Metre Rear Extension

A substantial extension option that can significantly enhance living space—perfect for a larger kitchen-diner, lounge, or home office. For terraced and semi-detached homes, extensions up to 6 metres may be allowed under permitted development through the Neighbour Consultation Scheme, but this still requires prior approval from the local authority. Always consult your council before starting work, as restrictions can apply, particularly for new builds or homes in conservation areas.

8 Metre Rear Extension

An 8 metre rear extension provides substantial extra space—ideal for open-plan living, larger kitchens, or multi-functional family areas. For detached properties, extending up to 8 metres may be possible under permitted development, but it requires prior approval through the Neighbour Consultation Scheme. As with all large home projects, it’s essential to check with your local planning authority—especially in the case of new builds, conservation areas, or designated land, where permitted rights may be restricted or removed.

Side‑Return Module

A clever way to utilise unused side space. Perfect for terraced and semi‑detached properties. It can provide a morning kitchen, accessible bathroom, or cosy studio annex.

Full Annexe Modules

When larger space is required, self-contained two- or three-room annexes can be delivered and installed in sections, then fitted together seamlessly. These are perfect for older parents seeking independence or children moving home.

Designing for Comfort, Safety and Wellness

Inclusivity Features

• Step-free access with level thresholds and low thresholds

• Walk-in showers & grab rails

• Thermal comfort: U-values at 0.18 W/m²K, underfloor heating

• Smart home integration: Assistive tech for health monitoring

Privacy with Togetherness

A modular annexe enables family closeness yet offers privacy—separate entrances, discreet access, shared garden zones—all without compromising on either side.

The Best Modular Extension: What Makes Vergolus Unique?

Expert Turn‑Key Service

From concept to completion:

1. Design & planning – we handle drawings, Permitted Development or full planning

2. Off-site production & quality control

3. Installation – modular framework assembled onsite quickly

4. Finish & fit‑out – kitchens, bathrooms, flooring, heating, electrics

5. Certification – building regulations and control approvals managed end‑to‑end

Steer Clear of Hidden Costs

Traditional builds can overrun. Vergolus provides fixed pricing and schedule commitments—no last-minute surprise costs.

Quality, Durability & Comfort

• Steel walls insulated to current regulations

• 25‑year warranty on structure

• Ground screw foundations: zero mess, eco-friendly, up to 3 m depth

• Strong thermal performance: internal U‑values outperform standard brick-and-cavity walls

Case Study: A Garden Annexe for Grandma

The Lees family in Bedfordshire needed a safe and independent space for Grandma. A 3m rear modular extension with ground‑screw foundation was installed in under 6 weeks. It included:

• Wide entrance & level access

• En-suite bathroom with walk-in shower

• Underfloor heating

• Self-contained small kitchen

• Stylish finishes that matched the main house

Result: Grandma loves her independence, yet the family feels closer and more supportive than ever.

Situation	Modular Annexe (Vergolus)	Traditional Brick Extension
Budget certainty	✅ Fixed-price quotes, no overrun	❌ Risk of hidden cost increases
Installation speed	✅ Installed in weeks	❌ Months on-site
Accessibility needs	✅ Tailored accessible layout	❌ Requires extra adaptation costs
Environmental impact	✅ Ground screws, less waste	❌ Heavily concrete-dependent
Privacy vs shared living	✅ Private module, attached or separate	❌ Harder to separate living spaces

FAQs for Families Considering the Best Modular Extension

1. Is a modular annexe more expensive than a brick-built one?
   No – while material costs may be similar, faster build time and controlled budgeting often make modular more cost-effective.

2. Can elderly relatives live safely in a garden annexe?
   Absolutely. Vergolus incorporates accessible design, level thresholds, underfloor heating, and width‑compliant doorways.

3. Do these modular annexes need planning permission?
   Many fall under permitted development. Vergolus will advise or manage full planning where needed.

4. How long does it take to complete a modular annexe?
   Most projects – sizing 15–30 m² – complete in 6–8 weeks from groundwork start to finish.

5. Is a standalone annexe expensive to run?
   No. High energy efficiency and ground-screw foundations mean low running costs and excellent insulation.

6. Can adults or grown-up children move in permanently?
   They can. We build annexes that meet full living standards: kitchen, bathroom, heating, lighting, ventilation.

7. Can I still charge rent if it’s for family?
   Yes, especially if your adult child is on a pension or benefits. It’s sensible to document building regulations and intentions.

8. Will my parents be lonely living in the annexe?
   Keeping it close to the main house, with some shared outdoor areas and quick access, balances privacy and togetherness.

9. Will an annexe add property value?
   Yes. Professionally built annexes can add 10–20% to property value due to added usable space.

10. What warranty and aftercare do you offer?
    Vergolus provides a minimum of 25 years structural warranty and dedicated aftercare throughout the lifespan of your annexe.

The Best Modular Extension Solutions

If you’re considering adding space for elderly parents, grown-up children, or multi-generational use, Vergolus offers the best modular extension solutions:

• Fast, efficient installation with minimal disruption

• Bespoke designs tailored to your family’s needs

• Cost certainty—we pride ourselves on transparent pricing

• Top-level quality and durability with 25‑year warranties

• Increased property value, practicality, and peace of mind

Ready to Create a Better Family Life?

Call Vergolus today at 0800 433 2353 to chat about your project and get a free design consultation.
Request our information pack and see how our solutions can transform your home.
Book a site survey to get a tailored estimate and timeframe.

Vergolus – building harmonious family living, one module at a time.