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London Renovation & Building Contractors

Crafting exceptional London homes since 2008

From period kitchen renovations to listed building extensions, we bring 15+ years of London building expertise to every project — managing everything from planning to completion.

15+ Years ExperienceAcross all London boroughs
Fully InsuredPublic liability & employer cover
Listed Building SpecialistsConservation area approved
Planning & PermitsWe handle all applications
5★ Google RatingTrusted by 120+ London families
Modern kitchen renovation in London by Papillon Builds Islington · Kitchen renovation · 2024
01
Renovation

Kitchen Renovation London

A Papillon kitchen renovation is built around how you actually live. From open-plan layouts in Victorian terraces to full galley redesigns in period flats, we handle every trade in-house — no subcontractor delays, no surprises.

  • Full structural reconfigurations
  • Bespoke cabinetry & storage
  • Countertop & worktop installation
  • Flooring & lighting design
  • Plumbing & electrical
  • Open-plan wall removal
  • Bi-fold door & skylight fitting
  • Utility room conversions
Book a free site visit
Luxury bathroom renovation London by Papillon Builds Wandsworth · Bathroom renovation · 2024
02
Renovation

Bathroom Renovation London

From en-suite wet rooms to full principal bathroom transformations, we combine skilled tiling, plumbing, and joinery under one contract. Trusted by London homeowners across Wandsworth, Notting Hill, Lambeth, and beyond.

  • Full bathroom strip & refit
  • Wet room & walk-in shower
  • En-suite creation
  • Tiling & waterproofing
  • Vanity & bespoke joinery
  • Underfloor heating
  • Plumbing & fixture supply
  • Ventilation upgrades
Book a free site visit
Home extension in London by Papillon Builds Notting Hill · Rear extension · 2023
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Extension

Home Extension London

We design and build single and double-storey extensions throughout London, including rear, side, and wrap-around configurations. We manage planning applications, structural engineering, and party wall matters — so you don't have to.

  • Single & double-storey extensions
  • Rear & side return extensions
  • Wrap-around extensions
  • Kitchen-diner extensions
  • Planning & permitted development
  • Party wall agreements
  • Structural steelwork
  • Building regulations sign-off
Start your project
Loft conversion London by Papillon Builds South Kensington · Dormer loft conversion · 2024
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Conversion

Loft Conversion London

Turn unused roof space into a beautiful bedroom, home office, or en-suite. We specialise in Velux, dormer, hip-to-gable, and mansard conversions — the full spectrum of London loft types across terraced, semi-detached, and detached homes.

  • Velux / rooflight conversions
  • Dormer loft conversions
  • Mansard conversions
  • Hip-to-gable conversions
  • En-suite bathroom fitting
  • Staircase design & installation
  • Insulation & fire compliance
  • Planning & structural drawings
Book a free consultation
Listed building renovation London by Papillon Builds Kensington · Grade II listed renovation · 2023
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Specialist service

Listed Buildings & Conservation Areas

We are one of a small number of London contractors with deep experience in grade II listed and conservation area renovations. Where other builders say no, we know how to work within planning constraints — maintaining character while delivering genuinely modern living standards.

  • Grade I & II listed renovations
  • Conservation area extensions
  • Listed building consent guidance
  • Original feature restoration
  • Sympathetic modern interventions
  • Heritage lime plasterwork
  • Sash window & joinery repair
  • Liaison with conservation officers
Discuss your listed building
Basement conversion London by Papillon Builds Chelsea · Basement conversion · 2024
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Conversion

Basement Conversion London

London's most valuable square footage is often beneath your feet. We handle full basement dig-outs, structural underpinning, tanking, and fit-out — transforming unused cellars into gyms, cinema rooms, guest suites, or entirely new living floors.

  • Full basement dig-out
  • Structural underpinning
  • Waterproofing & tanking
  • Damp proofing
  • Natural light via lightwells
  • Party wall agreements
  • Planning & building regs
  • Full fit-out to any spec
Get a basement assessment
Roofing contractors London by Papillon Builds Lambeth · Flat roof replacement · 2024
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Roofing

Roofing London

Whether you need a full pitched re-roof, a flat roof replacement on a rear addition, or a new roof lantern for a kitchen extension — our roofing team works across all London property types, including Victorian and Edwardian terraces.

  • Pitched roof replacement
  • Flat roof (EPDM & GRP)
  • Roof lantern installation
  • Skylights & rooflights
  • Lead flashings & valley repairs
  • Chimney stacks & pointing
  • Guttering & fascias
  • Roof insulation upgrades
Get a roofing quote
Structural work London by Papillon Builds Chandelier & Structural Work
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Structural

Structural Work & Underpinning

Load-bearing wall removal, steel beam installation, and structural underpinning require builders confident enough to take full responsibility. We work with structural engineers and provide all calculations, certificates, and building control sign-off.

  • Load-bearing wall removal
  • RSJ & steel beam installation
  • Structural underpinning
  • Subsidence remediation
  • Foundation strengthening
  • Structural calculations provided
  • Building control certificates
  • Engineers' reports & liaison
Discuss your project

Our process

How we work

01
Free site visit
We visit your property, listen to what you want to achieve, and assess the space. No hard sell — just honest conversation about what's possible and what it'll cost.
02
Detailed quote
Within 5 working days you receive a fully itemised quote — no vague estimates. We handle planning applications, structural drawings, and permits where required.
03
Build
A dedicated site manager runs your project. You get weekly updates and a direct line to us — not a call centre. We work cleanly, on programme, and on budget.
04
Aftercare
All work is guaranteed. We return for a snagging review and remain available for any questions after completion. Most of our new clients come from referrals.

What our clients say

Trusted by London homeowners

★★★★★

"We'd had three builders turn down our Kensington listed building extension. Papillon said yes — and delivered exactly what the conservation officer approved. Remarkable work."

Sarah T.Kensington, London · Listed building extension
★★★★★

"Our Victorian terrace in Notting Hill needed a complete rear extension and kitchen overhaul. Papillon handled planning, the party wall, and every trade. Finished on time, on budget."

James & Claire M.Notting Hill · Rear extension & kitchen
★★★★★

"The basement conversion added an entire floor to our home. Papillon managed the underpinning, tanking, and fit-out seamlessly. Our house value went up significantly."

David R.Chelsea · Basement conversion

London coverage

We work across all London boroughs and the surrounding home counties, including Islington, Hackney, Camden, Wandsworth, Lambeth, Southwark, Kensington & Chelsea, Hammersmith & Fulham, Tower Hamlets, Lewisham, Greenwich and beyond. Not sure if we cover your area? Get in touch — we almost certainly do.

Ready to start your project?

Tell us what you have in mind. We'll visit, assess, and give you a detailed quote within 5 working days — no obligation.

Book your free site visit

Papillon Builds

How can we help?

Get a free quote or speak with our team about your renovation project.

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