Flat extensions

London architect guide

Inspiration and ideas

Below we have selected some projects to lend architectural inspiration and design ideas for extending or renovating your property with some flat extensions architect advice and insights.

Architect designed Kilburn Brent NW2 kitchen house extension Kitchen 200x200 Flat extensions London | Home design
Architect designed flat extension Warwick Avenue Westminster W9 Views to the garden Flat extensions London | Home design
Kings Cross Islington WC1 – Listed Building rear flat extension – Rear elevation photo copy e1582378687858 Flat extensions London | Home design
Paddington Westminster W2 Listed Building flat renovation Open plan layout 1 Flat extensions London | Home design

Flat extensions London architect guide – Design aspirations and key considerations

The architectural elements and design ideas are not what primarily create the essence of ‘home’. Yet the created spaces accommodate our everyday routines, activities, and little moments that make up our lives. Extending a flat is not just a box ticking exercise about floor plans, the number of bedrooms, cost per square foot, and Freeholder’s approvals. Ultimately it is the genuine quality of the spaces around us that are essential for a happy life.

You might find yourself walking in a rather small and modest flat that instantly makes you feel at home, the spaces seem to flow, there is a clear sense of orientation even if you have never set foot in this property before, and if you happen to look carefully you will probably find lots of storage space hidden away from view in the most surprising places. This is what we aim to achieve and we will need your help to understand what is important to you since this is what will drive our decision making. For such flat extensions architect advice is what you need to help you come up with a space that feels right. 

During the design development stage we will get to explore lots of ideas, but you can start the process now by considering answers to questions as such:

  • “How long do we plan to live in the property and how is our lifestyle likely to change over this time? What are the chances for a growing family, working from home, or picking up gardening as a hobby one day? Is this flat a place for us to grow into, or is it a stepping stone to our dream property?”
  • “What are the top three things we like about the flat, and what are the top three things we want to change as part of extending and re-designing it?”
  • “Do we have a specific budget ceiling, and where do we want the money spending to be focussed on? What are the special elements of the design we do not want to compromise and where can we be more flexible within the context of our budget?”
  • “What are the provisions of my Lease, or Share of Freehold Agreement, and how do we need to go about securing Freeholder Approval for the building works?”

Flat extensions London architect guide – Types and options for your home project

The lack of residential space in London has seen more and more Victorian and Edwardian single family dwellings converted into single or multi-storey flats. Sometimes these conversions have been successful, but more often that not they have failed to provide accommodation of sufficient standards.

When it comes to possible options when it comes to flat extensions London largely depend on the relationship between the flat and the ground level:

Ground level | Garden flats can have a linear relationship with the garden, (the rear wall is of a straight line) or typically there is an L-shaped layout that opens up the flat both to the rear and side parts of the garden. Rear and side extensions look to add floor space, create better sightlines to the garden, and improve access to natural light. They often require a complete redesign of the existing layout of the flat and such extensions look to create opportunities for larger kitchen areas and additional bedrooms.

Middle level | Extensions to such flats are near impossible unless there is a lower level roof area to build on. Rights to build over such roof areas need to be obtained by the owner of the flat and there are also Freeholder approval issues to consider on top of any other Local Authority permissions required.

Upper level | Roof extensions, including mansard roof extensions when the property is in the right area, add substantial value and floor area to flats. It is worth remembering that flats do not have Permitted Development Rights under planning, which means that only small dormer extensions are typically allowed by the Council. What might be possible in design terms will mostly depend on the existing head heights in the loft space and how the staircase can be designed so it maximises the available habitable space while at the same time minimising any disruption to the level below. For such flat extensions architect advice is required and you need to speak to someone with experience in assessing how best the staircase will comply with the current Building Regulations.

GOAStudio London residential architecture media opinion publications 2 Flat extensions London | Home design

iBuild magazine – Impressive renovation case study – South Hampstead residential house extension – February 2024

"GOAStudio's renovation and extension project in South Hampstead stands as a testament to the delicate art of preserving history while embracing the demands of contemporary living." This month our South Hampstead residential house extension and refurbishment project...

The Telegraph | How to get a bigger home in an unforgiving market

"As the inflation rate has started to fall and mortgage rates have drifted down, George Omalianakis, of GOAStudio London architects, says the appetite for renovations has started to creep up. “Homeowners are deciding that the future looks a bit better now and it is...

Ideal Home | Kitchen extension cost – what to budget for a new and large room

You want to land on an extension size that is just large enough to meet your internal needs. Going beyond this would be a waste of money. 'You will discover the right size by playing around with a few plans and layouts to see how best you can organise the internal...

Country Living – 9no. kitchen flooring ideas for a refreshed look. Tips and ideas by George Omalianakis, GOAStudio

9 kitchen flooring ideas for a refreshed look - Plus advice on practical choices for busy spaces, upcycling your existing tiles and how to pick underfloor heating. Article by Jayne Dowle, Country Living "The biggest trend of all in kitchen flooring in 2023 will be...

Homebuilding & Renovating | How much value does a loft conversion add

How much value does a loft conversion add? "The typical value added can be around 10% to 20% if creating a new bedroom and ensuite with a loft conversion, explains architect George Omalianakis from GOAStudio architects. He adds that the value increase will depend on...

Build It magazine | Lighting for kitchen diner extensions

"In general, there are two main impressions you can create with natural light. The theatre stage effect plays with the contrast between the lighter and darker areas, meaning less is more when it comes to rooflights. By reducing the amount of overhead light coming in,...

Architectural plans

Architectural plans and professional guidance for your home project You will need to prepare architectural plans for your home project. They are often called “architect plans” however they do not need to be prepared by chartered architects (ARB / RIBA) as such. While...

Terraced house extension plans

Terraced house extension plans and professional guidance for your home project   Do you own a Georgian, Edwardian or Victorian house? Is it terraced, semi-detached or detached? And would you like to add a single or double storey extension? In all these cases you...

Architects London – GOAStudio London residential architecture

Architects London GOAStudio London residential architecture We are London architects with a very specific focus, skillset and expertise and we work on residential projects across London. George Omalianakis is an expert London architect for residential extensions and...

Loft conversion cost planning permission architect guide

LOFT CONVERSION COST, ADDED VALUE, AND PLANNING PERMISSIONS By GOAStudio London residential architecture What loft conversion rooms add value?How much does a loft conversion cost?Do loft conversions add value? What is a hip-to-gable loft conversion?What is a mansard...

Rear house extension ideas photo gallery

REAR HOUSE EXTENSION IDEAS PHOTO GALLERYBy GOAStudio London residential architecture Clad in brick or clad in timber.Fully glazed or half glazed. Timber frames or steel frames. Round skylights or walk-on skylights. Regular roofs or irregular roofs.Choose a shape, any...

Find interior residential RIBA architects for extensions near me

A HOW-TO GUIDE SEARCHING ARCHITECTS ONLINE FOR YOUR HOME PROJECT "find architects near me" "find an RIBA architect near me" "architect firms near me" "residential architects near me" "architects for extensions near me" "interior architects near me" We are often asked...

Householder planning permission. Haringey Noel Park Conservation Area.

Addition of a single storey rear extension and internal alterations to a single family dwelling in N22, Haringey.Area and context The site is a two-storey terrace dwellinghouse on the south side of Maurice Avenue. The property is located within the Noel Park...

Bromley BR3 house extension planning approval

Single storey rear extension and alterations to a house at Bromley BR3 - Approval by GOAStudio London residential architecture We have just obtained a planning approval for one of our current projects in Bromley BR3. For our latest Bromley BR3 house extension planning...

New planning approval Rear garden flat extension Westminster NW6

Planning approval for the addition of a single storey rear extension to a garden flat in Westminster, NW6. To include the replacement of windows to the front elevation. The new planning approval for a rear garden flat extension Westminster NW6 was issued by the...

New planning approval Conservation Area Waltham Forest E17

Planning approval Conservation Area Waltham Forest E17. To include the replacement of three timber windows to front and one timber window to rear with heritage uPVC double glazed windows - Orford Road Conservation Area, Waltham Forest in September 2022. The new...

New planning approval Rear house extension Enfield N21

Rear house extension Enfield N21 - We were appointed to design the renovations and extensions for a single family dwelling in a conservation area at Enfield N21. We have just obtained planning approval for a single storey rear ground floor extension to create a...

New planning approval rear house extension Barnet EN4

Rear house extension Barnet EN4 - We were appointed to design the renovations and the addition of a rear extension for a single family dwelling at Barnet EN4. We have just obtained planning approval for a single storey rear ground floor extension to create a combined...

New planning approval | House extensions Ealing W3

House extensions Ealing W3 - We were appointed to design the renovations and extensions for a single family dwelling at Ealing W3. We have just obtained planning approval for a single storey rear ground floor extension to create a combined kitchen, dining and living...

New planning approval | Double rear extension Tower Hamlets E1

Double rear extension Tower Hamlets E1 - We proposed and obtained approval for the addition of a double storey rear extension to a ground floor maisonette flat; the planning approval included the creation of an external terraced area and associated internal and...

New planning approval | Rear house extension Enfield EN2

Rear house extension Enfield EN2 - We proposed the addition of a 4m. deep rear extension to create an enlarged kitchen and dining area that opens up to the rear garden. We made sure that the proposal could be considered as Permitted Development and we applied to...

New planning approval | Single storey front side house extension Barnet N2

New planning approval | Single storey front side house extension Barnet N2; to include internal alterations to create a new bedroom.

Let's chat

If you need expert advice from an RIBA Chartered Architect please email us at george@goastudio.co.uk with the following:

  • the full address of your property,
  • a couple of photographs showing the areas you would like to extend and renovate,
  • a brief description of the changes you would like to carry out to your home, and
  • any estate agent or similar plans you might have available.

We will

  • assess the information and get back to you with initial advice about what might be feasible,
  • search the public planning records of your local authority to find similar planning approvals nearby,
  • prepare a free consultation to include information on design ideas, architectural fee estimates, project stages and requirements, and
  • afterwards we will prepare a detailed fixed fee proposal to cover the architectural services you will need for your project.

We are here to assist with your project.

Introducing GOAStudio London residential architecture limited

“George Omalianakis Architecture Studio – GOAStudio London residential architecture” was set up in 2009 to provide architectural services and assist home owners with their residential projects across London.

George Omalianakis is a multi-award winning chartered architect with the Royal Institute of British Architects (RIBA), registered with the  Architects Registration Board (ARB), and has extensive experience in working on a variety of residential, commercial and educational sectors.

Which? magazine residential expert and contributor. Ideal Home magazine residential expert and contributor. Member of the Green Register of Construction professionals.

We provide architectural services in the following London Boroughs:

Read our design, planning, and architectural guides above if you seek advice for your project.

We can help you with these home extensions and renovations:

See our guides above for ideas, inspiration and architectural advice for your home project.

GOAStudio London residential architecture limited 2024 300x300 Flat extensions London | Home design

We specialise in

  • Greener homes
  • Retrofit and energy efficiency for older and traditional buildings
  • Conservation areas
  • Listed Buildings
  • Homeowner architectural services
  • Developer architectural services

RIBA Chartered architect services

CONTACT US

GOAStudio London residential architecture limited, 86-90 Paul Street, EC2A 4NE, Hackney

GOAStudio London residential architecture limited, Chestnut Avenue South, E17 9EJ, Waltham Forest

t: 0203 984 3005
e: george@goastudio.co.uk
e: media@goastudio.co.uk

 

RIBA White 300x68 Flat extensions London | Home design

arb logo wl Flat extensions London | Home design