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You may be interested in having us prepared a design based on your sketch or ideas, or wish to  buy one of our existing designs for self build and/or for the submission to a Building Department for obtaining a building license. We have 7 options available:

Stage a: Sketch plan
Stage b: Conceptual design
Stage c: Pre design
Stage d: Basic design
Stage e: Detailed design + 3-D render 
Stage f: Construction drawings + technical specifications
Stage g: A full package including the shop drawings which will allow you to build the house exactly as we would have prefabricated it



The following may be a helpful tool to decide which stages you may need; 

stage a: If you only need a set of drawings for a quick review for own use,
stage b: If you only need a set of drawings for a first global quick review by the local Building Authorities,
stage c: The drawings prepared in this stage can be used to invite a contractor to submit a ballpark figure to build,
stage d: If you would like to inquire for a quotation from a contractor which is within a plus or minus 10% margin.
stage e: This stage is required for the application of a building permit (local council or county) (*),
stage f: In the event that you wish to engage a contractor to build the unit for you based on our detailed drawings and technical specifications,
stage g: If you wish to build the unit by yourself. No contractor required.

(*) A Building Authority may require that a static structural calculation be submitted. We strongly advise you to verify this with your local Building Authority. In the event that such calculation is required we will be able to prepare such calculation against a variation order.


If you decide to place a fabrication order with us after a formal approval has been obtained from the building Authority we will refund the full design fee except the costs for the structural calculation (if needed).   

We will also be able to add the design drawings for the electrical and/or plumbing installation against  variation order.

If you have questions or need explanations or clarifications do not hesitate to contact us. Click <here>   

(*) We guarantee approval from the Building Authority on both our drawings and/or structural calculation. 




Stage a: Sketch plan

The sketch plan comprises a floor plan with main dimensions and all elevations. No cross sections and details will be provided. The sketch plan is widely used for a first interpretation of the design by the owner for a global review whether the project will fit and match the owner's requirements. The conceptual design is in a very primary stage and in most cases will require an upgrade to stage b and c or even to stage d 


Stage b: Conceptual design

The conceptual design comprises a more detailed worked out plan with all dimensions, all elevations and some cross sections. The concept comprises one plan. Minor changes and/or modifications will be accepted until the client is satisfied, whereas a second concept may be worked out, however, in the event of drastic and major changes on any of the concept (1 or 2), a new modified concept will be drafted against a variation order of 10% of the fee due for this stage, a fee which is non refundable. The same holds for a 3rd, 4th, 5th, etc. concept. During the conceptual design we will in broad lines consult on the program of requirements (if available). A ballpark figure on the cost for the house will be submitted. A conceptual design is widely used for a first assessment by a Building Authority, council or county whether the project will be eligible for a building permit. 


Stage c: Pre design

The pre-design. This stage comprises the preparation of the plan in more detail, worked out elevations, cross sections, type of windows and doors and if so required we will prepare a pre-design structural calculation. We will consult in detail on the program of requirements (if available). The main structural dimensions will be determined in this stage. The client may request for changes as long as these changes do  not change the concept. The maximum time spent on changes shall not be more than 10% of the fee due  In the event that more changes are being requested a similar procedure will be applied as mentioned in Stage b..


Stage d: Basic design

Stage d is the basic design stage. Stage d is recognized by the detailing of the structure, preparation of all pertinent cross sections, typical details, foundation lay-out, worked out floor plans, windows, doors, etc. During this stage final late changes are still allowed, however, to a maximum time spent of 5% of the fee due. Time spent in excess shall be reimbursed against a variation order similar to Stage a. Once the client has approved the basic design a detailed structural calculation may need to be prepared (*). No changes to the drawings will be possible unless the client agrees against a payment of USD. 50./hour to accomplish these changes


Stage e: Detailed design

Stage d is the final design phase. Drawings will be worked out into fully detailed construction drawings and foundation plans added.  
Note: All of the designs for a Building Authority, council or county need to be rubber stamped by a local architect or engineer. The client may at his own discretion engage an architect or engineer of his choice, or alternatively may ask help from our company for rubber stamping against an additional fee.


Stage f: Construction drawings and technical specifications

In stage f  the technical specifications will be drafted, detailed foundation plans worked out and plumbing and electrical plans added 


Stage g: Full package

This is a full design package and includes the shop drawings. These are drawings detailed to the millimeter and shows each drilling hole, bolt location, dimensions of recesses and rebates, etc. of each part of the structure (every board, beam, column, truss chord, panel frames etc), With these drawings at hand it will be a piece of cake for your contractor to build the house exactly as we would have prefabricated it. This option may save you a significant amount of money since you do not need to ship the unit whereas you may use the whole package to invite a number of contractors to submit a bid and engage the lowest bidder. The process is that simple that with some DIY experience you may even do it all by yourself . View a number of drawings which are part of a full design package <here>


(*) Structural calculation;

The structural calculation will be prepared in accordance with the IBC 2009 (latest USA codes) and will include an analysis for cyclone wind load resistance and/or earthquake loads if such is a mandatory requirement by the Building Authority depending on the location you will build. Extra costs will be  involved for the preparation of a structural calculation.  


General note: 

Our design options offer the opportunity for a client who does not wish to engage an architect or engineer to obtain a design straight from the shelf.  During the course of the preparation of the conceptual design we will  constantly involve you as to lead us to a design that will satisfy you. We will e-mail you our drawings as we progress whereas you will have the full opportunity to inform us what you require us to change, modify, add or delete up to the point that you are happy. In fact you design how you want it. After this we freeze the concept and continue with the basic design followed by the detailed design, etc.


Drawing format:

AutoCAD version 2009. The drawings can be printed in any format or size. We will also submit the full set in pdf - A3- format 


How to order a design

You may download the design package cost calculation sheet (see below), or ask us a quotation based on the selected stages shown above. Once you are in accord with the price you and we have received the deign fee payment we will e-mail the design package (*).

(*) Not all of our models have a readily available design in place. A number of them still needs to be designed in detail. We will inform you about the time required to accomplish this.   

And remember..............We will refund the full design fee if a fabrication order materializes !!!!


Example of how we work out our drawings for submission to a Building Authority, based on International drafting codes and requirements (approval guaranteed)



Click <here> for a price inquiry of our design services. Please state the total square meter area or sqft area) of the house and the design stages you would like us to be involved


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Last modified: November 05, 2013
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