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 will need to prepare house extension plans for your home project.

According to the Office for National Statistics – Census 2021

  • 7.8 million households (31.5% of all households) were in semi-detached properties, up from 31.3% (7.3 million) in 2011
  • 5.8 million (23.2%) were in detached properties, up from 5.3 million (22.7%) in 2011
  • 5.7 million (23.2%) were in terraced properties, down from 5.8 million (24.6%) in 2011

Below we have prepared answers to common questions about what detached, semi-detached and terrace house extension plans and information you will need to prepare for your home project.

 Terraced house extension plans

Where do I start for my terrace house extension plans?

 Terraced house extension plans

You can make a real good start by appointing an architect to help you develop your brief and to help you clarify your own requirements.

Before you even start with your plans for your terrace house extension you will need to have a think about what type of spaces you need now and in the future. You can have a look at what other terrace houses along the street got approved and you can find the approval on your local authority website.

What you will find there is terrace house extension plans and ideas for houses that are very similar to yours. This will help you visualise how much space you can add and this will help you see how others used this additional space.

Your own requirements might be different though. I often see the design of a terrace house extension project develop differently even when the layout of the existing house is the same and when the budget for the extension is the same too.

An architect will help you distil ideas you might have had over the years living in your terrace house. And an architect can help you reject ideas that might not give you the best type of extension for you and your family.

Once you have drawn up a few plans you will be able to reach to certain ideas and arrangements. This will give you clarity about which of the terrace house extension plans work for you and which direction you should take with the design development.

There are no right or wrong answers and through floor plans, sections and elevations you will develop a better understanding about what you need and what your terraced property can become for you.

 Terraced house extension plans

Who draws up plans for a house extension?

 Terraced house extension plans

Previously I mentioned architects since at GOAStudio we are London architects and we specialise in residential properties and preparing house extension plans for properties across London.

However you do not necessarily need an architect to draw up plans for your house extension.

What you need is a professional that has the skills, knowledge and experience to guide you through the design development stage and to prepare a bunch of technical plans, specification, and information for the approvals you will need to obtain and for the builders to price.

Such a professional could be an architect, a technologist, a building technician, or an interior designer. Probably not your builder.

And probably not yourself unless you are accordingly qualified and / or as a minimum you have read a couple of construction for dummies manuals and you know what the pictures in the manual mean.

At some point it is likely that you also need a structural engineer to draw up plans for your house extension project.

 Terraced house extension plans

Do you need planning drawings or building regulation plans for your terrace house extension?

 Terraced house extension plans

The quick answer is yes, as a minimum you will need planning drawings and building regulations plans for your terrace house extension project.

The same applies to any type of house extension project, double storey extensions, single storey extensions, and whether the house is terraced, semi-detached or detached.

The idea is that house extension plans are prepared to convey the necessary information for the various approvals you will need to obtain for your home project.

Actually, “plans” is a shorthand for different types of drawings. “Plans” can mean floor plans, elevation illustrations, section cuts through the house, or 3D images that show the house from a bird’s eye view angle.

Terrace house extension planning drawings convey information to the planning officer to demonstrate two key things: a. what is there at the moment and b. what alterations you aim to carry out.

In fact such planning stage house extension plans come in two sets: as existing and as proposed. And the idea is that anyone can compare them to see exactly what the alterations and extension are and how such changes to the house comply with the planning regulations.

Typically such planning stage house extension plans include dimensions about the depth, width and height of the proposed extension. They also include information about the materials you propose to use, how new windows and door relate to the pattern of the existing windows and doors, and they need to demonstrate how your proposed extension impacts the neighbouring houses.

Building Regulations house extension plans are much more detailed and they include a larger quantity of construction information that is relevant to the current Building Regulations. For more information about what you need to include in these Building Regulations plans see Planning Portal – Building Control

Typically though the architect will prepare a set of technical Building Regulations plans and information for the Building Regulations submission. And a structural engineer will also prepare a set of structural Building Regulations plans an information to be also submitted to the Building Regulations Inspector.

The Inspector will check the technical and structural plans, request additional information if this is necessary and provide a conditional approval to these plans. Then the Inspector will visit the building site 4-5 times during the construction stage. At the end of the construction stage the Inspector will certify the building works and confirm that everything was built in accordance to the current Building Regulations.

What type of double storey extension semi detached house plans am I likely to need?

 Terraced house extension plans

Given that 7.8 million households (31.5% of all households) live in semi-detached properties, single and double extensions are one of the most common types of development to residential properties.

Typically there are two main types of double storey extensions to semi-detached houses you will need plans for:

a. Double storey side extension semi-detached house plans – Semi-detached houses often allow a gap between the side of the house and the side boundary. Georgian, Edwardian and Victorian semi-detached house layouts can easily be added to as long as this gap to the boundary is a minimum of 2.5m. This is true for both the ground and first floor layout. At the ground floor the plan of the semi-detached house will evolve to accommodate an additional reception room or guest bedroom at the front. At the rear of new extension the floor plan can develop to enlarge the kitchen area and to provide a new utility space. On the first floor the plan can be developed to add more bedroom and bathroom areas to the semi-detached house.

b. Double storey rear extension semi-detached house plans – A semi-detached house can be potentially extended to both the side and the rear of the house. When you have a chance to extend on two storeys at the rear, and this is subject to planning approval, you end up with a floor plan that works differently on the ground and first floor levels. In most cases a double rear extension will allow for an enlarged kitchen, living and dining area on the ground floor. On the first floor you need careful development of the design to create additional bedroom and bathroom areas. The reason for this is that the existing staircase or the existing bathroom might not be in an ideal position to allow for the double storey extension to your semi-detached house to create much or useful additional floor space.

 Terraced house extension plans

Holland Park Conservation architect designed house extension and renovation in Kensington Chelsea W14 by GOAStudio London architects 09 Existing elevation 400x284 Terraced house extension plans

Holland Park conservation architect | Villa house extensions and renovation

Hackney N16 Kitchen extension and house renovation by GOAStudio London architects Kitchen island 400x284 Terraced house extension plans

Hackney N16 Kitchen extension

Putney Wandsworth SW15 House extensions full renovation Garden kitchen light 400x284 Terraced house extension plans

Putney Wandsworth SW15 House extensions full renovation

Lewisham SE13 Rear kitchen extension Through views 400x284 Terraced house extension plans

Lewisham SE13 Rear kitchen extension

Residential house extension and refurbishment Finchley Road Camden NW6 Contemporary architecture 400x284 Terraced house extension plans

Residential house extension and refurbishment Finchley Road Camden NW6

Angel Islington N1 Listed House rear extension Garden view 400x284 Terraced house extension plans

Angel, Islington N1 | Listed house rear extension

Architect designed rear house extension Highgate Haringey N6 – Rear elevation 400x284 Terraced house extension plans

Highgate, Haringey N6 | Rear house extension

Architect designed residential extension Stoneleigh KT17 – View to the garden 400x284 Terraced house extension plans

Stoneleigh KT17 | Extension and alterations to a bungalow

Architect designed roof and kitchen house extension Kingston KT2 Dining area 400x284 Terraced house extension plans

Kingston KT2 | Roof and kitchen house extension

High Barnet EN5 Residential extension locally Listed house Living and kitchen 400x284 Terraced house extension plans

High Barnet EN5 | Locally Listed house extension

Muswell Hill Haringey N10 Side kitchen extension Breakfast bar area 400x284 Terraced house extension plans

Muswell Hill Haringey N10 | Side kitchen extension

Enfield Chase EN2 Rear house extension refurbishment External view 400x284 Terraced house extension plans

Enfield Chase EN2 | Rear house extension and refurbishment

Architect designed rear house extension Finchley Central Barnet N3 Fluid use of space 400x284 Terraced house extension plans

Finchley Central Barnet N3 | Rear house extension

St James Park Westminster SW1H Penthouse alterations and refurbishment Living area 400x284 Terraced house extension plans

St James Park, Westminster SW1H | Penthouse alterations refurbishment

Nunhead Lewisham SE15 House kitchen extension – Rear elevation 2 400x284 Terraced house extension plans

Nunhead, Lewisham SE15 | House kitchen extension

Architect designed house extension Grange Park Enfield N21 View outside in 400x284 Terraced house extension plans

Grange Park, Enfield N21 | House extension and alterations

Architect designed Putney Wandsworth SW6 kitchen house extension View from the garden 1 400x284 Terraced house extension plans

Putney, Wandsworth SW6 | Kitchen house extension

Architect designed rear house extension Herne Hill SE24 Lambeth Kitchen and garden view2 400x284 Terraced house extension plans

Herne Hill, Lambeth SE24 | House extension

Architect designed house extension Brockley Lewisham SE4 View to the garden 1200x781 1 400x284 Terraced house extension plans

Brockley, Lewisham SE4 | House extension

Architect designed house extension Chiswick Hounslow W4 – Bathroom design photos copy 400x284 Terraced house extension plans

Chiswick, Hounslow W4 | House extension

Architect designed house extension Highbury Islington N5 Ground floor kitchen area 400x284 Terraced house extension plans

Highbury, Islington N5 | House extension

6 400x284 Terraced house extension plans

Kitchen refurbishment Canonbury Park North Islington N1

Architect designed Listed House extension Angel Islington EC1 Upper floor internal views 400x284 Terraced house extension plans

Angel, Islington EC1 | Listed house extension

Architect designed house extension Maryland Newham E15 View to the garden 400x284 Terraced house extension plans

Architect designed house extension Maryland Newham E15

Kings Cross Camden NW1 House extension External view and detail 400x284 Terraced house extension plans

King’s Cross, Camden NW1 | House extension

Paddington Westminster W2 Listed Building flat renovation Open plan layout 1 Terraced house extension plans

Paddington Westminster W2 | Listed Building flat renovation

Warwick Avenue Westminister W9 Flat extension Kitchen design idea 400x284 Terraced house extension plans

Warwick Avenue, Westminster W9 | Flat extension

Golders Green Barnet NW11 House extension Views of rear extension 400x284 Terraced house extension plans

Golders Green I, Barnet NW11 | House rear extension

Golders Green Barnet NW11 House extension Architectural design and internal views 400x284 Terraced house extension plans

Golders Green II, Barnet NW11 | House extension

Architect designed mansard roof house extension Angel Islington N1 Bathroom design copy 400x284 Terraced house extension plans

Angel, Islington N1 | Mansard roof house extension

Architect designed house extension East Finchley Barnet N2 Inside out 400x284 Terraced house extension plans

East Finchley, Barnet N2 | House extension

Architect designed house extension with full refurbishment Lewisham SE13 View of ground floor1 400x284 Terraced house extension plans

Lewisham SE13 | House extension and full refurbishment

Kings Cross Islington WC1 – Listed Building rear flat extension – Rear elevation photo copy 400x284 Terraced house extension plans

King’s Cross, Islington WC1 | Grade II Listed flat extension

Grove Park Lewisham SE12 House rear extension External copy 400x284 Terraced house extension plans

Grove Park, Lewisham SE12 | House extension

Architect designed rear house extension Tufnell Park Camden NW5 3D Section BB 400x284 Terraced house extension plans

Tufnell Park, Camden NW5 | Rear house extension

Architect designed rear house extension Penge east Bromley SE26 Rear view 1 400x284 Terraced house extension plans

Penge East, Bromley SE26 | Rear house extension

Architect designed two storey house extension Brockley Lewisham SE4 – Design rear elevation 3D copy 400x284 Terraced house extension plans

Brockley, Lewisham SE4 | Two storey house extension

Architect designed kitchen extension Honor Oak Park Lewisham SE23 Design section 300x266 Terraced house extension plans

Honor Oak Park, Lewisham SE23 | Kitchen extension

Architect designed penthouse extension Pimlico Westminster SW1P West Elevation 400x284 Terraced house extension plans

Pimlico, Westminster SW1P | Penthouse extension and alterations

Architect designed Kilburn Brent NW2 kitchen house extension External elevation 400x284 Terraced house extension plans

Kilburn, Brent NW2 | Garden flat extension

Southfields Wandsworth SW18 residential development – Architect design section copy 400x284 Terraced house extension plans

Southfields, Wandsworth SW18 | Residential development

Architect designed mansard roof extension Finsbury Park Islington N7 Kitchen 400x284 Terraced house extension plans

Finsbury Park, Islington N7 | Mansard roof extension

Architect designed rear house extension Muswell Hill Haringey N10 Ground plan 400x284 Terraced house extension plans

Muswell Hill, Haringey N10 | Rear house extension

Architect designed house extension Winchmore Hill Enfield N21 Floor plans 400x284 Terraced house extension plans

Winchmore Hill, Enfield N21 | House extension development

Highgate Haringey N8 Residential development feasibility study 3D images 400x284 Terraced house extension plans

Highgate N8 | Residential development feasibility study

Architect designed penthouse extension Angel Islington N1 Site section and elevation 400x284 Terraced house extension plans

Angel, Islington N1 | Penthouse extension

Architect designed flat extension Hammersmith Fulham W12 Design elevations 400x284 Terraced house extension plans

Stamford Brook, Hammersmith and Fulham W12 | Flat extension

Barnes Richmond SW14 – Rear house kitchen extension – 3D image copy 400x284 Terraced house extension plans

Barnes, Richmond SW14 | Rear house kitchen extension

Shepherds Bush Hammersmith Fulham W14 House extension Design sections and 3D images 1 400x284 Terraced house extension plans

Shepherd’s Bush, Hammersmith Fulham W14 | House extension

Finchley road Camden NW3 Flat extension Internal fitting layouts 1 400x284 Terraced house extension plans

Finchley Road, Camden NW3 | Flat extension

Architect designed roof flat extension Chiswick Hounslow W4 Steel frame construction 1 400x284 Terraced house extension plans

Chiswick, Hounslow W4 | Roof extension to a flat

Architect designed residential flat conversion Chiswick Hounslow W4 Design section and elevations 1 400x284 Terraced house extension plans

Chiswick, Hounslow W4 | Residential conversion to flats

Architect designed kitchen and roof house extension Arsenal Islington N5 Rear garden photo 1 400x284 Terraced house extension plans

Arsenal, Islington N5 | Kitchen and roof house extension

Architect designed penthouse extension Barbican Islington EC1Y West Elevation 1 1 400x284 Terraced house extension plans

Barbican, Islington EC1Y | Penthouse extension

Architect designed garden flat extension Tooting Broadway Wandsworth SW17 Site photo 1 400x284 Terraced house extension plans

Tooting Broadway, Wandsworth SW17 | Garden flat extension

Architect designed roof extension Shortlands Bromley BR1 Construction photos 400x284 Terraced house extension plans

Shortlands, Bromley BR1 | Roof extension

04 Highgate Haringey N8 House extension 3Ds sections and elevations 400x284 Terraced house extension plans

Highgate II, Haringey N8 | House extension

Highgate Haringey N8 Residential development feasibility study Sections 400x284 Terraced house extension plans

Highgate I, Haringey N6 | Residential property development

1216 Fulham Broadway H Fulham SW6 7UH Flat alterations to a mansard roof Front elevation 400x284 Terraced house extension plans

Fulham Broadway SW6 | Flat alterations mansard roof

Architect designed house extension West Hampstead Camden NW6 – 3D visual 400x284 Terraced house extension plans

West Hampstead, Camden NW6 | House extension

MAIDA VALE W9 400x284 Terraced house extension plans

Maida Vale, Westminster W9 | Flat extension

SOUTHFIELDS SW18 KITCHEN 400x284 Terraced house extension plans

Southfields, Wandsworth SW18 | Kitchen house extension

01 St Margarets Richmond TW1 House roof extension Section 1200x795 400x284 Terraced house extension plans

St Margarets I, Richmond TW1 | House roof extension

ST MARGARETS RICHMOND TW1 400x284 Terraced house extension plans

St Margarets II, Richmond TW1 | House extension

SW16 STREATHAM HILL 400x284 Terraced house extension plans

Streatham Hill, Lambeth SW16 | House extension

Clapham North Lambeth SW4 House extension Design floor plans 400x284 Terraced house extension plans

Clapham North, Lambeth SW4 | House extension

NW5 CHALK FARM 400x284 Terraced house extension plans

Chalk Farm, Camden NW5 | Rear flat extension

newham e7 400x284 Terraced house extension plans

Newham, E7 | House extension

Clapham Lambeth SW9 Flat extension Floor plan 400x284 Terraced house extension plans

Clapham Lambeth SW9 Flat extension

Streatham Lambeth SW16 Flat extension Ground floor plan 400x284 Terraced house extension plans

Streatham Lambeth SW16 Flat extension

Kensington Chelsea SW5 Philbeach Conservation area architect services Window replacement and external alterations by GOAStudio London architects 03 Section 400x284 Terraced house extension plans

Philbeach Conservation area architects

Leytonstone Waltham Forest E11 Rear house extension ElevR 400x284 Terraced house extension plans

Leytonstone Waltham Forest E11 | Rear house extension

Leyton Waltham Forest E11 new build housing development PlanG 400x284 Terraced house extension plans

Leyton Waltham Forest E11 New build housing development

Waltham Forest E17 Upper floor house extension refurbishment PlanG 400x284 Terraced house extension plans

Waltham Forest E17 Upper floor house extension refurbishment

Walthamstow Waltham Forest E17 Rear side house extension Floor plan 400x284 Terraced house extension plans

Walthamstow, Waltham Forest E17 | Rear side house extension

Leytonstone Waltham Forest E11 garden flat rear extension refurbishment Section and elevation 400x284 Terraced house extension plans

Leytonstone, Waltham Forest E11 | Garden flat rear extension refurbishment

South Woodford IG8 rear house extension Design section 400x284 Terraced house extension plans

South Woodford IG8 Rear house extension

Streatham Lambeth SW2 House extension garage conversion Section BB 400x284 Terraced house extension plans

Streatham Lambeth SW2 House extension garage conversion

Woodford Redbridge IG8 Architect designed house development Ground floor plan 400x284 Terraced house extension plans

Woodford Redbridge IG8 Architect designed house development

Wanstead Redbridge E11 Roof house extension Loft plan 400x284 Terraced house extension plans

Wanstead Redbridge E11 Roof house extension

Dalston Hackney N16 House side extension Section BB 400x284 Terraced house extension plans

Dalston Hackney N16 | House side extension

Hoxton Hackney N1 House extensions Section AA 400x284 Terraced house extension plans

Hoxton Hackney N1 House extensions

Aldgate Tower Hamlets E1 Flat extension Architect Section AA 400x284 Terraced house extension plans

Aldgate Tower Hamlets E1 Flat extension

Bethnal Green Tower Hamlets E2 Rear house extension Architect floor plan 400x284 Terraced house extension plans

Bethnal Green Tower Hamlets E2 Rear house extension

Upton Park Newham E7 Ground Roof house extension Architect Section AA 400x284 Terraced house extension plans

Upton Park Newham E7 Ground Roof house extension

Plaistow Newham E13 Rear side house extension architect Section BB 400x284 Terraced house extension plans

Plaistow Newham E13 House rear side extension

Lambeth SE1 conservation area residential development Front elevation 400x284 Terraced house extension plans

Lambeth SE1 Conservation area residential development

Streatham Lambeth SW16 Side extension Section BB 400x284 Terraced house extension plans

Streatham Lambeth SW16 Side extension

GOAStudio London residential architecture media opinion publications 2 Terraced house extension plans

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 Terraced house extension plans

We specialise in

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

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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

 

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