Individual Task

Design and detail an extension to the existing property comprising of a medium sized garage (approx. 6×4.5m) and double bedroom with en-suite.

The overall weighting for the Portfolio is 60%.

This is made up of 4 components.

Components & breakdown:

  1. Hand Drawings (70%)
  2. PDF CAD Drawings (15%)
  3. Written Analysis (10%)
  4. Completed Lab Data and reports (5%)

These 4 components are worth 60% of the module.


The client has approached you to carry out an in-depth proposal for an extension to a modern dwelling as part of a tendering process. The client has asked for an extension comprising of a medium sized garage and a double bedroom with an en-suite bathroom.

You are required to prepare a portfolio showing the new-build extension to the existing modern building shown in the drawings released to you by your tutor in the Workshop Sessions. For planning approval, certain detailed drawings of the existing property are required as well as options for the use of different materials and technologies for the extension. Each drawing should be annotated in detail with a material and component analysis of each drawing. The client has given you a target date      to reach so that you can present the portfolio to them.

In summary, the portfolio must consist of annotated, dimensioned and scaled hand drawn drawings of the main components of the existing dwelling and the proposed extension:

You must include drawings from sections 13, and one other from either section 4 or 5. You must submit your written work (reports & labs) to the dropbox on NOW as above. A total of 10 drawings are required in the portfolio.

The ‘portfolio’ should be submitted online as a combined PDF document

Required Drawings:

  1. Floor plans and elevations of proposed extension.

Similar to the plans provided as part of your drawing pack, you are to design plans for your extension. You must show your extension in relation to the existing property (but you do not need to redraw the existing house entirely). You must draw ground and first floor plans. You must show an internal layout i.e. internal walls, bedroom, en-suite, doors, garage etc. Similar to the elevation of a house provided on NOW, you are to draw at least three

(3) elevations of your extension. You must show windows and doors, a tiled/slated pitched roof and roughly the positioning of the guttering. You must add floor to ceiling heights and floor to cill and head heights of the windows. These drawings should be drawn at the appropriate scale 1:50. (5 no. drawings)

2. Upper floor sectional detail – Floor Joist Connection to Cavity Wall

You must draw a section of a first-floor connection. You must include an external loadbearing wall to show how the floor is supported e.g. wall hangers or sitting on internal skin of the external wall etc. This drawing must be drawn at an appropriate scale of 1:5. (1 no. drawing)

3. Mass concrete foundation details and ground floor – 3 types.

The domestic foundation options will be discussed in your tutorial sessions, lectures and workshops. You should draw all three options – pile, raft and strip foundations. A strip foundation example has been provided in your drawing pack. The internal and external floor levels will stay the same, but you can add a floor finish to the internal floor if you wish for

e.g. carpet, tiling, wooden floorboards etc. (Don’t forget your screed though). You must draw the foundations at a scale of 1:10. (3 no. drawings)

4.     External door threshold sectional detail

External door threshold details have been provided in your drawing pack with an elevation of a building showing a door in elevation provided on NOW. These should be drawn at a scale of 1:2 or 1:5. (1 no. drawing)

5.     Sectional internal stud wall portion (insulated options)

You must include insulation in one of your timber stud walls. Insulated stud walls are provided in plan from your drawing pack on the floor plans. The stud walls can be drawn at any appropriate architectural scale. See Knauf Insulation online for further research in acoustic and insulated timber stud walls. (1 no. drawing – suitable scale)

Note: Please refer to the assignment 1 full brief for further details on annotations, dimensioning, presentation, detailed analysis, other inclusions etc.

You must also add:

  • The completed laboratory work sheets and reports
  • Full reports for all drawings detailing the materials, layout & design decisions etc.

WRITTEN ANALYSIS You are required to include analysis of the construction components and materials of each drawing with a minimum of 200 words per drawing. This analysis should be in the form of a word document submitted to the Dropbox. You are required to pay particular attention to:

  • the actual properties of materials and why they might be used in domestic building
  • advantages and disadvantages
  • how your extension is designed to the current Building Regulations (reference made to relevant parts of the current Building Regulations).

These must be uploaded to DROPBOX also.

Drawings and Drawing Sheets

  • All drawings should be on A3 paper to scale with a border and drawing title block.
  • All drawings should be annotated and dimensioned comprehensive, you must annotate
  • all parts of your drawings.

All drawings should include the appropriate hatching.

Assessment CriteriaFurther Guidance
1 Identify and recall modern and historic technological and primary structural principles and methods underlying domestic construction.Construct a portfolio of work to display your knowledge and understanding of a domestic construction project.
2 Review and demonstrate the fundamental concepts, principles and theories associated with the development and refurbishment of domestic  buildings  and  the  associated construction materials and process.Develop awareness of researching appropriate practical sources and how and where to locate them.
3 Recognise and describe the relationship between design, construction, and the use of buildings in a sustainable and environmental context.Produce and develop an awareness of typical working practices related to the science of building design and construction.
4 Illustrate and solve technical problems on key aspects of domestic construction.Evaluate information in order to plan and promote problem solving.
5 Demonstrate effective communication in oral, written and graphical formats incorporating relevant analysed information. 

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