London's Luxury Renovation Specialists
Every room tells
a different story.
We build, renovate and redesign homes across London's finest postcodes. From listed Belgravia apartments to Notting Hill extensions — done properly, once.
Trusted by
Where We Work
We know every London postcode that matters
Mayfair
W1Grade I & II listed conversions, lateral flats, mews houses
Belgravia
SW1Stucco-fronted townhouses, garden apartments, whole-house refurbishments
Kensington
W8Victorian terraces, lateral conversions, basement and loft works
Chelsea
SW3Garden square houses, kitchen extensions, bespoke interior fit-outs
Notting Hill
W11Side returns, rear extensions, heritage restorations
Marylebone
W1Period apartments, commercial conversions, roof terraces
How It Works
One team. One conversation. No surprises.
Consultation
We visit your property, listen carefully, and ask the questions others don't. No obligation.
Design & Specification
Our architects and designers translate your brief into a precise specification and visual scheme.
Planning & Permissions
We handle all planning applications, party wall agreements and building regulations on your behalf.
Build
Our own teams deliver on site. You have one point of contact from day one to handover.
Who We Are
Built on trust, since 2008
ASAAN was founded in 2008 by a team that had grown tired of the gap between what London's best addresses deserved and what most contractors delivered. Based in Crawford Street, Marylebone, we bring architectural design, construction management and specialist trades under one roof.
We don't use subcontractors we haven't worked with for years. We don't give estimates we can't stand behind. We don't disappear after handover.
Client Voice
What clients say
“ASAAN transformed our Belgravia apartment beyond anything we had imagined. The detail and finish is extraordinary.”
“From initial design to handover, the team was professional and delivered exactly on brief. I wouldn't use anyone else.”
Accreditations & Memberships
From the Journal
Renovation insights
Guides
Lighting Design in a London Renovation: Layers, Zones, and Specification
Lighting is the finish that most clients underspecify. A well-designed lighting scheme requires thinking about layers, zones, and control before the first cable is chased.
Guides
Why Every London Renovation Needs a Contingency — and How Much to Hold
Every renovation uncovers something unexpected. The question is whether you have planned for it financially. Here is a realistic guide to contingency budgeting for London renovation projects.
Planning
Loft Conversions in London: Types, Planning Rules, and What to Budget
A loft conversion adds usable floor area without extending the building footprint. Here is a complete guide to the options, planning framework, and realistic costs for London properties.
Common Questions
What clients ask us
- What areas of London do you work in?
- ASAAN works across all of prime central and west London — Mayfair, Belgravia, Kensington, Chelsea, Notting Hill, Marylebone, Westminster and the surrounding postcodes. We also take on select projects elsewhere in London where the scope and specification meet our standards.
- How much does a full house renovation in London cost?
- A whole house renovation in London typically costs between £200,000 and £650,000 for a 3–5 bedroom property at high specification, with larger or more complex properties running to £1,000,000 and above. Cost is driven by property size, specification level, listed building status, and the extent of structural and services work required. Read our detailed cost guide.
- Do you handle planning permission and listed building consent?
- Yes. Our architectural team manages all planning applications, listed building consent, prior approval notifications, and building regulations submissions in-house. We have a strong track record with Westminster, RBKC, Camden and other demanding London planning authorities.
- How long does a renovation project take?
- A full house renovation typically takes 9–15 months from initial brief to completion — including design (2–3 months), planning and party wall agreements (2–4 months), and construction (4–8 months). Complex projects involving listed buildings, basements, or extensions can take 18–24 months. We always give clients a realistic programme before work starts. See our full renovation timeline guide.
- What is your minimum project size?
- ASAAN focuses on projects at the upper end of the London market. We typically work on projects of £50,000 and above, with most of our projects in the £200,000–£1,000,000+ range. We are not the right fit for small cosmetic works.
- Do you provide a single point of contact throughout the project?
- Yes. Every ASAAN project has a dedicated project manager who is your single point of contact from briefing through to handover. We coordinate all trades, manage the programme, and provide regular written updates. You should never need to chase multiple contractors for information.
Ready to start?
We visit your property, listen carefully, and give you an honest view of what's possible.