Example Upper Floor House Extension design and drafting,
Runaway Bay, Gold Coast
The following example upper floor house extension has been designed and drafted for an owner builder. SKETCH3D assisted the client formulate their home extension ideas and guided the client through the building design stage before preparing and drafting the working drawings. The upstairs layout is intended to be the clients own home privately separated from down stairs, allowing for the potential to convert the rooms below the upper floor as an airBNB or rental apartment.
The home extension design consists of plans for converting the space below the existing high set house into what is potentially a self contained apartment which could be used as short term rental or for longer term tenants. This house did originally have an upper floor of a poor build quality and layout which was uneconomical to modify and still achieve the overall goals. The original upper floor is demolished and a new, better laid out open plan home design replaces and improves how the house works, flows and feels. In effect a new build high set home.
The external appearance has had a total facelift. From a basic painted fibreboard box upstairs and a brick lower floor, with a low mono-pitched roof transformed into a coastal classic style. Featuring bold gables, a porch and a carport to the front and to the rear a large upper floor deck with usable outdoor enteraining space below
This design required boundary relaxations for the sides and front. In the process of improving the look and feel of the home the minimum setbacks are being pushed and so required a council development approval.
The house extension plans, designed and drafted by SKETCH3D are modelled in a virtual 3D environment, and so include an interactive 3D walkthough at no cost to the client, used to explore and assist in the understanding of the design rather than trying to read 2D plans alone. A massive advantage for builders and home owners.
View further example house extension plans. For your own "Grand Design" or to discuss your home extension ideas Contact us
or call 0406 807833 for a chat and ideas about what could be designed into your home..
- Sketch render view - Site plan - Existing floor plans - Existing house elevations - Demolition plans -
- Proposed lower floor house extension design - Proposed first upper house extension design -
- Proposed front and side home elevations - Proposed rear and side home elevations - Proposed cross Section A-A - Proposed Section B-B -
- Proposed Section C-C - Proposed Section D-D - Proposed Section E-E - Proposed Section F-F -
- Slab plan - Roof plan - Lower floor electrical plan - Upper floor electrical plan -
3D Visualisation - Sketch render effect
Projects involving external works benefit from 3D views as part of the drawing package to explain the intended home extension design ideas to all of the contractors as well as providing a cover sheet to the design documents. The 3D views clearly show the external facelift forming the coastal classic design of extended and renovated home. The use of black and white / greyscale keeps printing costs and file sizes low. The sketch render effect is easier on the eye than hard line CAD drawings, explains the design intent and avoids the distraction of details that are otherwise covered in technical working drawings.. - Return to top
House extension - Site Plan
When drafting a house plan, extension or renovation design, a site plan is required, showing the setbacks from the boundaries, the location of the works, site coverage and important site features that will affect the building application. The use of coloured hatching identifies the new and existing areas. - Return to top
House extension - Existing Floor Plans
The existing upper and lower floor plans of this high set home have been drafted showing the relevant areas of the house as it stood before the new extension design was applied. The lower floor consisting of an empty undercroft has a grid of steel posts and timber beams. It was enclosed within brick walls and ready with a concrete slab. The existing first floor had a dated plan and the layout didn't take advantage of the site with the living areas facing the street and no outdoor entertaining areas. The first floor was constructed out of light gauge steel framing and was not a simple plan to modify to what the client wanted without extensive modifications. The client who is a carpenter by trade made the early decision to strip off the upper floor allowing for effectively a new home design over the existing structure.. - Return to top
Existing house elevations
The existing house elevations are drafted showing the external appearance and finishes as the home stood before being extensively modified and extended, this allows a comparison between the existing house and the proposed extension design and assists the builder in planning for the junction between new and old surfaces - Return to top
Demolition floor plan
The demolition plan indicates which elements are being removed and modified, the purpose of this plan is to assist the builder planning the new works and identify which areas being modified might require additional making good. In this instance the whole of the upper floor is being demolished along with the stair accessing it. - Return to top
Proposed lower floor home extension plan
The proposed lower floor home extension plan was designed to work with the existing grid of steel posts where possible, also keeping the external brickwork which was rendered and painted. A carport runs continuous from near the front boundary, below the upper floor side extension and opens out to the rear near the entertaining areas. A new porch accesses the converted space below the high set home, forming bedrooms, bathroom, living and kitchen areas. An outdoor room to the rear gives direct access to the rear yard. - Return to top
Proposed first floor home extension plan
The proposed first floor home extension plan was designed to sit over the existing upper floor structure with a new layout which takes advantage of the views over the rear yard. The open plan arrangement has a large entertainers kitchen, living room and dining, the living space opens up to a decent sized balcony for outdoor entertainment. The home is extended to the side to create a generous master bedroom with a walk in robe and ensuite. The family bathroom is also within this side extension. The home extension design required a boundary relaxation in order to take advantage of the width of the site.. - Return to top
Proposed home extension front and side elevations
The proposed home extension design front and side elevations clearly indicate the intended look of the house after receiving its new upper floor and coastal classic facelift. Render on the lower level evens out the external appears hiding years of adhoc alterations. - Return to top
Proposed home extension rear and side elevations
The proposed home extension design rear and side elevations clearly indicate the intended look of the house after receiving its new upper floor and coastal classic facelift. Materials used include linear weathboarding and painded render. To the rear of an outdoor living space with high raked ceilings. The carport is semi-obscured with vertical timber battens allowing some light to get to the existing lower floor windows. - Return to top
Proposed home extension Section A-A
Sections through the proposed double storey home design are included on the plans drafted, showing the relationship between levels, ceilings and notating structure in locations which explain the design intent and demonstrate compliance. This section cuts through the proposed open plan living, kitchen and dining rooms as well as the proposed balcony to the rear. - Return to top
Proposed home extension Section B-B
Sections through the proposed double storey home extension design are included on the plans drafted, This section cuts through the proposed side extension which includes a new master bedroom, walk in robe, family bathroom and carport below. The master bedroom has a direct private access to the balcoy overlooking the rear yard. - Return to top
Proposed home extension Section C-C
Sections through the proposed double storey home extension design are included on the plans drafted, This section cuts across the proposed side extension, through the existing lower floor and replacement upper floor. - Return to top
Proposed home extension Section D-D
Sections through the proposed double storey home extension design are included on the plans drafted, This section cuts across the proposed side extension, through the existing lower floor and replacement upper floor. - Return to top
Proposed home extension Section E-E
Sections through the proposed porch and carport designs are included on the plans drafted, This section cuts across the proposed carport and porch showing the proposed extended home in the background. - Return to top
Proposed home extension Section F-F
Sections through the proposed porch and carport designs are included on the plans drafted, This section cuts across the proposed carport and porch showing the proposed extended home in the background. - Return to top
Proposed home extension Slab plan
The slab plan indicates the extent of the concrete slab without any walls etc. for setting out. In this instance the majority of the new slab is no more comlex than a driveway, however the coloumn positions are important to allow for accurate setttnig out. Timber posts also have concrete footings so have been indicated.. - Return to top
Proposed home extension roof plan
The slab plan indicates the extent of the concrete slab without any walls etc. for setting out. In this instance the majority of the new slab is no more comlex than a driveway, however the coloumn positions are important to allow for accurate setttnig out. Timber posts also have concrete footings so have been indicated.. - Return to top
Proposed home extension lower electrical plan
Electrical plans indicate the approximate location of the lighting, switches and power sockets as well as the smoke alarm positions required for compliance. In this instance the owner builder already had much of his lower electrical plan marked out within the accomadation below the house. - Return to top
Proposed home extension upper electrical plan
Electrical plans indicate the approximate location of the lighting, switches and power sockets as well as the smoke alarm positions required for compliance.. TV point locations are determined by the intended furniture layout, which has been configured on the main house extension floor plans.. - Return to top
