London & Kent · Design-Led Builders

More space. More value.
Made for urban living.

Premium loft conversions, extensions and renovations across Bromley, Beckenham, Chislehurst, Orpington and Hayes. In-house design, planning and structural — one team, fixed price.

4.9/5 Google reviews
10-year warranty
FMB & TrustMark
Modern loft conversion with black zinc dormer at golden hour, London
180+
Projects delivered
10 yrs
Structural warranty
£0
Cost for site visit
1
Single point of contact
What we do

End-to-end design and build, delivered properly.

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Featured projects

A portfolio built on craft and detail.

A snapshot of recent loft conversions and extensions across South East London and Kent.

Mansard Loft, Beckenham
Loft Conversion
Mansard Loft, Beckenham
Side-Return Kitchen, Bromley
Extension
Side-Return Kitchen, Bromley
Whole-home Renovation, Chislehurst
Renovation
Whole-home Renovation, Chislehurst
Rear Extension, Orpington
Extension
Rear Extension, Orpington
Why Nested

An architect's eye, a builder's grip.

We bring planning, structural design and construction under one roof — so nothing falls between the cracks and your project lands on time, on spec.

In-house design & planning

Architectural drawings, planning, party walls — handled by our team.

Structural coordination

Steels, calcs and Building Control via our trusted engineering partners.

Premium build quality

Directly employed site team, no subcontractor handover gaps.

Fixed-price contracts

JCT-based contracts with a transparent, itemised cost plan.

AI Quote Assistant

Check your loft potential in 30 seconds.

Tell us what you're picturing — we'll return an instant indicative budget, then a real fixed-price quote after a free site visit.

  • · Trained on hundreds of London & Kent projects
  • · No email required to see your estimate
  • · Sends straight to WhatsApp for follow-up
AI Quote Assistant

Get an instant project estimate

Powered by our pricing model trained on hundreds of London & Kent loft and extension projects.

Estimated investment
£94,000 £113,000
Indicative range incl. VAT. Final quote provided after a free site visit.
Word of mouth

Homeowners who'd recommend us in a heartbeat.

"Nested transformed our cramped loft into a stunning master suite. The detail and finish were unmatched and they hit the programme to the day."

Sarah & James
Beckenham

"From the first design meeting to handover, everything felt considered. Our rear extension added serious value and we love the daylight."

Priya K.
Bromley

"Premium service. They handled planning, party walls and structural work seamlessly — we just had to choose finishes."

Tom & Ellie
Chislehurst
Areas covered

Local builders. Real local knowledge.

Dedicated landing pages with planning notes, conservation areas and recent projects in each location.

FAQs

Answers, before you ask.

Common questions about loft conversions, extensions, planning, cost and timelines.

All FAQs
How much does a loft conversion cost in London?+

Loft conversion costs in London typically range from £35,000 to £90,000+ depending on the type of conversion, property structure, size and specification. Dormer loft conversions are usually the most cost-effective, while mansard conversions are more premium and complex.

What is the cheapest type of loft conversion?+

A Velux or rooflight loft conversion is usually the cheapest option because it requires minimal structural alterations to the roof.

Which loft conversion adds the most value?+

Dormer and mansard loft conversions often add the most value to London properties because they create significant additional living space and bedrooms.

Do I need planning permission for a loft conversion?+

Many loft conversions fall under permitted development rights, but mansard lofts, front-facing dormers, conservation areas and flats may require planning permission. We handle planning applications and party wall agreements as part of every project.

How long does a loft conversion take?+

Most loft conversions take between 6–12 weeks depending on the complexity, structural work and weather conditions.

Ready to unlock your home's potential?

Free site visit, fixed-price quote, and full design and planning under one roof.