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
Interiors
Designing the Drawing Room in a Prime London Townhouse: Proportion, Comfort, and Formality
The drawing room is the social heart of a prime London townhouse — the room that receives guests, hosts dinner parties before the move to the dining room, and represents the household's aesthetic sensibility to the outside world. In a Georgian or Victorian townhouse, the principal drawing room is typically on the first floor (the piano nobile), with the best ceiling height, the finest cornice, the most elaborate fireplace, and the windows that command the best view of the street or garden. Designing this room well requires an understanding of its architectural logic, an approach to furniture arrangement that reflects how the room is actually used, and a command of the formal elements — fireplace, curtains, lighting — that determine its character after dark.
Planning & Design
Renovation and Property Value in Prime London: What Adds Value and What Does Not
The relationship between renovation investment and property value in prime London is not straightforward. Some renovations add significantly more value than they cost; others add less than their cost; and some — if done incorrectly — can actually reduce a property's value. Understanding what the prime London buyer values, what they discount, and how the quality of execution affects value enables clients to make renovation decisions that are financially as well as aesthetically sound. This is not primarily a question of predicting the market — it is a question of understanding what constitutes quality in this market and specifying accordingly.
Planning & Design
Renovating a Georgian London Townhouse: Architecture, Constraints, and Opportunities
The Georgian London townhouse — built between approximately 1714 and 1830 — represents the highest concentration of architecturally significant residential stock in the world. The terraces of Mayfair, Belgravia, Marylebone, and Bloomsbury were developed according to strict architectural codes that produced an extraordinary consistency of proportion, material, and detail. Renovating a Georgian townhouse is both a privilege and a responsibility: the fabric is legally protected, the proportions demand respect, and the opportunity to restore lost quality while meeting modern standards of comfort is genuinely exciting. Understanding the architectural logic of the Georgian townhouse — why it is the way it is, what has typically been lost, and what can be recovered — is the starting point for any renovation of one of these buildings.
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.