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Innovative Residential Project - Architectural design in Putney, London
Experienced Design Project - Architectural design in Putney, London
Modern Architectural Design - Architectural design in Putney, London
Sustainable Building Design - Architectural design in Putney, London
Contemporary Home Extension - Architectural design in Putney, London

Creating spaces that inspire and endure

Putney Architects

Welcome to Andrew Catto Architects. Based in the heart of Putney (SW15) since 1999, we've helped homeowners, developers, and businesses across Southwest London achieve exceptional results. Our credentials include Green Register and AECB membership and SPAB conservation training. Andrew chairs the Putney Society Buildings Panel and is Honorary Secretary of the Association of Consultant Architects (ACA), involved in creating the ACA's appointment documents and Principal Designer Register.
Our day to day business includes house extensions (rear, side, single & two-storey), loft & basement conversions in South and West London and surrounding areas as well as conservation & listed building work with SPAB-trained expertise and sustainable & eco-friendly design backed by Green Register membership. We provide comprehensive planning application support for full applications, Permitted Development and appeals.
At Andrew Catto Architects, we pride ourselves on our deep understanding of local architecture particularly across in Putney, Richmond and Merton boroughs as well as Westminster, Lambeth, Kensington and Chelsea, Kingston, Surrey, etc ensuring that each design harmonises with its surroundings while pushing the boundaries of modern user friendly design.

Architects: Extensions, Loft & Basement Conversions, Conservation & Sustainable Design

With proven success in Conservation Areas across Wandsworth borough and others boroughs like Richmond, Hammersmith and Fulham, Merton, we know the local regulations inside out. Our end-to-end service starts from your brief and continues through the build, with project management, tendering, budgeting, and site supervision. Book a consultation today and discover why homeowners, developers, and businesses trust our 25+ years of local expertise.

Our Credentials

With decades of architectural experience and hundreds of successful projects, we bring proven expertise to every design challenge.

25+

Years in Practice

Established in 1999

1200+

Completed Projects

Across Southwest London

95%

Planning Success Rate

Including complex sites

150+

Repeat Clients

Trusted relationships

Local Planning Mastery - Andrew Catto Architects

Local Planning Mastery

We navigate the complex planning regulations of Putney and London wide with exceptional success rates.

Conservation Area Specialists

Our team excels at designing sensitive, contextual solutions that respect heritage while meeting modern needs.

Client-First Approach

We listen carefully to your needs and aspirations, creating designs that truly reflect your vision and lifestyle.

Technical Excellence

Our designs combine aesthetic appeal with technical precision, ensuring beautiful spaces that work as they should.

Andrew Catto Architects celebrating 25 years of architectural excellence in Putney, London

Celebrating 25 Years of Architectural Excellence in London and the South East

Since 1999, Andrew Catto Architects has been transforming properties across Southwest London. Led by Director Andrew Catto, who trained at the prestigious Architectural Association School, and long-term Director Melissa Lawrence Da Cunha, we bring decades of expertise in navigating the complexities of local planning and related policies, especially in conservation areas.

Our deep understanding of planning regulations across Hounslow, Richmond, Kingston, Merton, Hammersmith & Fulham, Kensington & Chelsea, Wandsworth, Westminster and adjacent boroughs allows us to deliver projects that respect heritage while embracing contemporary living needs. From planning applications and appeals to sustainable renovations, our team has successfully completed hundreds of projects across your local area.

OUR WORK

Exceptional Projects by Andrew Catto Architects

Browse our portfolio of residential and commercial, new builds, extensions, renovations, and sustainable designs that showcase our commitment to thoughtful, context-sensitive architecture.

Rear extension that opens to garden - View 1
2012

Rear extension that opens to garden

Felsham Road- Putney

Opening up the view - View 1
2012

Opening up the view

West Putney

Southdean Gardens - View 3
2012

Optimising Permitted Development

Southdean Gardens - Wimbledon Park

A modern take on the pitched roof - View 1
2025

A modern take on the pitched roof

Rusholme Road conservation area - Wandsworth West Hill

2024

It is not always about a large extension

Willett Estate Roehampton SW15

Wandsworth / A small extension, a transformative space - View 10
2023

Small extension – big change

Wandsworth

Landford Road / One extension or two? - View 8
2023

One extension or two?

Putney Velodrome estate

Making it look simple - View 1
2022

Back to the future

Lots Road - Chelsea

Isleworth / Let there be light - View 3
2022

Rediscovering views

Isleworth

L shaped Victorian terrace - View 1
2021

A quart into a pint pot

Cardinal Place - Central Putney

Clarendon Drive / Let there be light - View 5
2021

Daylight in the basement

Clarendon Drive - Putney

Flats above shops, East Putney - View 1
2020

Converting the already converted

Flats above shops, East Putney

3 Flats above Putney High Street shop - View 1
2020

Stair tower unlocks 3 flats

Putney High Street

Cannon Hill / Exploiting the slope - View 5
2020

Exploiting the slope

Eastway - Cannon Hill, Morden

Flat Conversion on Upper Richmond Road - View 1
2019

Optimising Upper Floors

Central Putney

Edwardian house - View 1
2019

More space without extending!

Rusholme Road CA - Putney Heath

West Hill - View 3
2019

Spot the extension

Wandsworth - West Hill

Using levels to define spaces - View 1
2013

Using levels to define spaces

Tideswell Road - Putney

Rear extension that opens to garden - View 1
2012

Rear extension that opens to garden

Felsham Road- Putney

Opening up the view - View 1
2012

Opening up the view

West Putney

Southdean Gardens - View 3
2012

Optimising Permitted Development

Southdean Gardens - Wimbledon Park

A modern take on the pitched roof - View 1
2025

A modern take on the pitched roof

Rusholme Road conservation area - Wandsworth West Hill

2024

It is not always about a large extension

Willett Estate Roehampton SW15

Wandsworth / A small extension, a transformative space - View 10
2023

Small extension – big change

Wandsworth

Our Architectural Services

With 25 years of experience in Putney and Southwest London, we provide comprehensive architectural services tailored to your needs.

FEASIBILITY

Before you commit to a full project, we can look at your property and advise what changes or how big a build will be practical, what may be difficult or costly, and what is likely to get consent, saving time and cost later. If you are looking at buying a property to extend, an initial verbal assessment often needs just an hour or so on site and is great value if it saves you buying the wrong house.

OUTLINE DESIGN

Your requirements may be simple or complex, but getting the big picture and basic diagram right is at the heart of what we do and it's worth taking time to explore all options before getting down to detail. Where we differ is in working face to face with you at this stage to ensure you are happy with the plans before moving on to consents.

PLANNING PERMISSION

This is the topic that causes most frustration to house owners and professionals alike. Planning Permission controls the use, scale and external appearance of buildings. Almost all building works need this in some form although often we can show you how to avoid the need for full consent through "Permitted Development" or "Prior Notification". We will liaise with the planners, suggest specialists where needed, research policy and context, write the "Design & Access Statement" and other documents, prepare and follow up the application. We don't seem to need many Planning Appeals, but for tricky cases we can help you take this next step.

BUILDING REGULATIONS

These cover the technical aspects of construction, and apply to all building works, including many internal alterations and any change of use. There are rules on structure, fire precautions, energy use, heating, ventilation, drainage, disabled access, the safety of stairs and glazing etc. These are regularly revised and extended. Most alterations, and all new buildings now need complex heat loss calculations. We can handle all of this for you, and ensure that our designs comply at all stages.

GREENER CONSTRUCTION

As one of the first practices locally to be accredited to the Green Register, we aim to ensure that all of this is done in the most sustainable way, and will advise you on energy saving measures to include in your build. Ever rising prices make this the right time to look at generating at least some of your own energy.

LISTED BUILDINGS & CONSERVATION AREAS

Even more restrictions apply if your house is a "listed" building (rare) or in a "Conservation Area" (many of the nicer bits of London, and some that may surprise you). The presumption may be against change, but a lot is still often possible by working closely with the planners. Andrew Catto is SPAB trained in the repair and alteration of historic structures. We know our Arts & Crafts from our Art Deco and how to detail either.

HEALTH & SAFETY

Nobody's favourite phrase. But construction is dangerous, and the legislation to deal with this extends even into the early design stages. We will advise you of what is needed, and act as the 'Principal Designer' now required by law.

PARTY WALLS

For a lot of building work there is a legal requirement to give notice to and get an agreement with your neighbours. This can be surprisingly time-consuming, so we aim to get your initial notices out as soon as possible. Andrew & Melissa have years of experience as Party Wall Surveyors.

TENDERS, CONTRACTS AND DURING THE BUILD

Properly priced tenders and building contracts are the key to meeting your programme and avoiding price disputes with your builders. We can prepare schedules of work and pricing documents, advise on builders (we have a wide ranging list) and contracts, and seek tenders for both your main building contract and specialist elements. We can deal with all aspects of your building contract, checking the builder's work on site and agreeing payments due, or simply be available to advise when required.

TESTIMONIALS

What Our Clients Say

We take pride in our client relationships and the spaces we create together.

"This was our first renovation project, but we still decided to jump off the deep end and go for a full renovation of our flat. Andrew Catto architects were recommended to us by the builders who we were considering hiring (and eventually did hire for the job). We first met..."

A & G

W9
"I engaged Andrew Catto Architects for both design and project management of a fairly small project which nevertheless required planning permission because I live in a Conservation Area. Andrew made some suggestions which improved the design ideas I'd already had. Melissa then managed things smoothly through the process of gaining..."

James

West Hill
"I found your website through a google search and really fell in love with the tone and information provided - I felt in good hands from the start!"

Jessie

Putney
"Working with Melissa and the team at Andrew Catto Architects has been the key to delivering our building project. Without her expertise and direction, we feel our space would not be half as inviting and flow so well. She works hard to timelines, and importantly provides creative inspiration to make..."

Miranda

Putney
"I can thoroughly recommend Andrew Catto and his team. We undertook a large side return and extension project in Putney and their professionalism and attention to detail throughout made the whole process go through seamlessly. From Andrew's initial meetings and careful plans through to Melissa's excellent management of the project..."

Nick and Lucy

Putney
"We are so pleased with everything you have done for us. Andrew for advising us on our dream kitchen, Melissa for getting the project up and running and recommending Tom from ETG Design and Build, whose team did an amazing job ahead of time and within budget. I cannot believe..."

Mr Keable-Elliott

Norwood
"Andrew and Melissa have worked diligently and patiently with us over a number of years. Given the planning and legal complexities involved with the project, this might have scared lesser practices off. We were however guided expertly through the process and our expectations professionally managed at all stages. We are..."

A J H Carmichael & W Pollard-Clark

Putney Area
"Melissa & Andrew handled the whole planning process, which can be extremely painful, professionally & thoroughly through to getting a satisfactory permission for a house on a difficult site. I am most grateful for all their hard work & excellent result."

Mr S Briggs (Stonehurst Estates)

Putney Area
"What a great job. Thank you so very much for all your hard work and attention to detail in providing our extension. It was such a pleasure and support having you as our architect. All our best wishes."

Mr & Mrs. Holt

Putney Area
"I can wholeheartedly recommend Andrew Catto and his team for loft extensions. They were professional and thorough throughout the project, and were able to guide me through pricing the project, selecting suitable builders, and arrange contracts and invoices. Melissa's eye for detail was invaluable, and her suggestions and design changes..."

Mr Barnes

Putney Area
"My husband and I found a property in central Putney that needed some drastic renovation. Although situated in a great location, it had an awkward layout and we also wanted to create a bit more space with a limited budget. As the house was in a conservation area we were..."

K Teh

Putney Area
"We initially chose Andrew Catto Architects for our building project because they had a wealth of local experience and clearly understood the house and what we wanted to do. They have been incredibly supportive through the whole process and made the planning and party wall process as painless as possible...."

C Hebbes

Putney Area
"Thank you Andrew for providing details of ETG Design & Build when myself and James were looking for work to be completed on our home, Tom and the team were fantastic – the quality of the work that was completed whilst remaining conscious of budget & the professionalism shown by..."

Mrs Mullins

Fulham
"We really appreciated the hard work that Andrew and his team put it to ensure that our kitchen renovation plans matched our requirements, adapting to our specifications, budget and the changes we asked for. The detail they put into the tender documents and the final contract made the building process..."

S. Lloyd

Putney
"As owner of this building I am pleased to have the opportunity to say what a pleasure it has been to work with Melissa and the team at Andrew Catto Architects. Throughout the project, from selecting a contractor out of the quotations received, over-seeing the work, advising on fitting out,..."

M. Conrathe – Cranbray Ltd

Putney
"It was a pleasure to work alongside Melissa from Andrew Catto Architects and share our in-depth expertise and space planning in all aspects of Interiors to complement and enhance the architectural design presented to the client. Based on the clients requirements, wish list and budgets we work together to creating..."

Nora, Casa Nora London

Putney Area
"Throughout the process, the team generated great ideas, worked incredibly well with us and our selected builders delivering a superb home for our family. We cannot thank Andrew, Melissa and the team enough for their professionalism and abilities. It made the design and build process a pleasure."

Mr P

Putney Area
"Melissa and Andrew, thank you very much for your help with our Eastway house renovation. We're nearly finished and look forward to it being finalised by Christmas. The design has made all the difference - we are loving the light and high ceilings in the kitchen, it feels like a..."

Ms R & Mr P

Merton
"We wanted to say thank you again for your support in designing our dream home. We love the space and how everything flows well together."

Mr & Mrs T

Hanworth
"I'm still extremely pleased with all the work done and the design. I'm still really pleased with the outcome – it's a great place to live with all the additional light!"

Mr W

Putney
WORK WITH US

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