--- title: "Architectural Services Putney | Extensions & Planning" description: "Chartered Architects in Putney SW15. Expert planning permission, conservation areas, extensions, lofts & basements. 25+ years experience." canonical_url: https://www.andrewcatto.co.uk/services/ language: en copyright: © 2026 Andrew Catto Architects Limited --- OUR EXPERTISE # Architectural Services in Putney & London We specialise in residential and commercial projects and navigating complex planning regulations in all sectors. With 25 years of experience, we provide tailored solutions to homeowners, developers, and businesses. ### [FEASIBILITY](https://www.andrewcatto.co.uk/services/#service-1) 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](https://www.andrewcatto.co.uk/services/#service-2) 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](https://www.andrewcatto.co.uk/services/#service-3) 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. Related: [our guide to planning permission](https://www.andrewcatto.co.uk/blog/planning-permission/) [Permitted Development explained](https://www.andrewcatto.co.uk/blog/permitted-development/) ### [BUILDING REGULATIONS](https://www.andrewcatto.co.uk/services/#service-4) 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](https://www.andrewcatto.co.uk/services/#service-5) 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. Related: [our approach to sustainability](https://www.andrewcatto.co.uk/sustainability/) ### [LISTED BUILDINGS & CONSERVATION AREAS](https://www.andrewcatto.co.uk/services/#service-6) 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. Related: [conservation & heritage projects](https://www.andrewcatto.co.uk/portfolio/conservation-heritage/) [building in conservation areas](https://www.andrewcatto.co.uk/blog/conservation-areas/) ### [HEALTH & SAFETY](https://www.andrewcatto.co.uk/services/#service-7) 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](https://www.andrewcatto.co.uk/services/#service-8) 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. Related: [when do you need a party wall agreement?](https://www.andrewcatto.co.uk/blog/when-do-you-need-a-party-wall-agreement/) ### [TENDERS, CONTRACTS AND DURING THE BUILD](https://www.andrewcatto.co.uk/services/#service-9) 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. ## Our Project Delivery Process We follow a comprehensive, collaborative approach to ensure your project's success from concept to completion. STEP 01 ### Initial Consultation We begin with a thorough discussion of your needs, aspirations, and budget. For residential projects, this typically involves a site visit to assess the existing conditions and potential. We'll explain planning constraints, feasibility, and outline the project process. 01 ![Andrew Catto Architects - Initial consultation with clients to discuss project needs and aspirations](https://www.andrewcatto.co.uk/images/services/AndrewCatto - Delivery Process - initial consultation.webp) STEP 02 ### Concept Design We develop initial design concepts and options based on your requirements, site conditions, and planning considerations. This includes sketch plans, 3D visualizations where appropriate, and an outline budget assessment to ensure the design aligns with your expectations. 02 ![Andrew Catto Architects - Developing 3D concept design for architectural projects](https://www.andrewcatto.co.uk/images/services/AndrewCatto - Delivery Process - concept design.webp) STEP 03 ### Planning Application As planning specialists, we prepare comprehensive planning applications with all necessary documentation, drawings, and supporting statements. We have extensive experience navigating local planning policies, especially in conservation areas and for listed buildings, maximizing your chances of approval. 03 ![Andrew Catto Architects - Planning application documents and architectural approvals](https://www.andrewcatto.co.uk/images/services/AndrewCatto - Delivery Process - planning application.webp) STEP 04 ### Technical Design and building regulations We develop detailed technical drawings and construction specifications that comply with building regulations. This includes structural calculations, material specifications, and detailed construction drawings that contractors will use to build your project. 04 ![Andrew Catto Architects - Detailed technical drawings and construction specifications](https://www.andrewcatto.co.uk/images/services/AndrewCatto - Delivery Process - technical design.webp) STEP 05 ### Contractor Selection We help you select the right contractor for your project by preparing detailed tender documents, evaluating bids, and recommending qualified builders. We have an extensive network of trusted contractors and can manage the entire tendering process. 05 ![Andrew Catto Architects - Evaluating contractor tenders and managing contracts](https://www.andrewcatto.co.uk/images/services/AndrewCatto - Delivery Process - tender and contract.webp) STEP 06 ### Construction & Project Management We provide comprehensive project management during construction, including regular site visits, quality control, progress monitoring, and contract administration. We ensure your project is built to the highest standards and completed on time and within budget. 06 ![Andrew Catto Architects - Construction site inspection and project management](https://www.andrewcatto.co.uk/images/services/AndrewCatto - Delivery Process - construction.webp) ## Ready to Start Your Project? We offer an initial consultation to discuss your project needs and how we can assist with from start to finish. --- [Original page](https://www.andrewcatto.co.uk/services/) ## Sitemap [sitemap.md](https://www.andrewcatto.co.uk/sitemap.md) · [llms.txt](https://www.andrewcatto.co.uk/llms.txt)