The two major cost models relative to the project design are; cost to design (CTD) and design to cost (DTC).cost to design n simply means putting up a design first and then estimating the total construction cost from the design usually without
formally trying it to any budget while design to cost entails stating your budget for the project first, then enduring that the project is the project is designed to be completed to within that budget. For instance using the recommended DTC model, a project owner can approach a designer/ contractor with say 4 million naira to construct a simply bungalow and
achieve his/her desires within it in the following simply steps:

First, you discuss the development idea/concept with the designer/ contractor,

Thereafter you reveal your initial budget, say 3.5millionnaira and retain the balance,

Then request that the designer/contractor provide two or three design options that can be achieved within your budget and based on your specifications (e.g it should consist of 3beds –allrooms en-suit, French-style windows, an ante-
room, slanting height, a court yard etc). However it is strongly recommended that you employ the service of a designer/contractor with good knowledge of both design, estimation and construction from the start as it is in common knowledge that most independent designers/ architects aren’t good estimators or alternatively you co-engage a quantity surveyor to achieve your cost goal (you will have to pay for this service say around 5%of the total project cost)

Once the preliminary site investment is completed and the building designs and cost estimates are ready, you then choose the most appealing design. Do not hesitate to per-inform the estimator/contractor to simplify the cost
estimates by breaking it into two main sections one showing the materials cost /schedule and the other, the labour cost/schedule (which will include the contractor s profit so that it can be negotiated separately). You have to study the estimate carefully and compare for consistency with the design.

Because some features would have been deliberately excluded in the design in order to make it fit into the cost plan, you may have to add some much desired feature(like special finish, fittings and fixtures, etc)within your retention
budget (in this case, the 500,000 NGN left) but don’t use all of it; keep a fraction for contingencies, and then..

You Are Good To Go
However in the cost-to-design model, the project owner/landlord is highly disadvantaged in that the designer/contractor may come up with fabulous design that may be far beyond you budget because there have been little or no consideration of the cost implication of the design at the initial stage. This is the most common case in practice. When this happens, subsequently the project owner lured to expensive design begins to run shelter skelter to source for additional funds to complete the project and this is not a funny experience.

Think carefully and make the the right choice of cost model to adopt for your next building project.

Source:
www.99propertyng.com/building-in-a-recession-how-to-get-a-design-you-can-build/


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How will this help naija condition

Third to comment wif 2g network

However in the cost-to-design model, the project owner/landlord is highly disadvantaged in that the designer/contractor may come up with fabulous design that may be far beyond you budget because there have been little or no consideration of the cost implication of the design at the initial stage.

Do you mean Design-to-Cost?

The problem with designing to budget is, you'll most likely end up with a design that wld not news your needs.. If you have a budget of 4m, you'll probably get a design of 2bedroom and you have a family of 4 kids already....

I'll advice that you get a comfortable design and build over a period... . You don't have to finish your design in 6 months..

Start early, maybe immediately you get you first job and build over some years by the time you are married with kids - your house wld be ready..

A comfortable 4 bedroom in minimum.. Start Now.

Check my signature for more advice on building...

Nice tips... Cost to design would not have much impact on a project owner with a good financial base but can be detrimental to a project owner not wanting to exceed the limit of his/her estimates... Therefore DTC would be best for such people to avoid probable project abandoning.

.

Please which one is "Designer" in the construction industry? He/she is called an architect, before engineers, builders and urban planners start calling themselves designers to enter the "hustle" of building design

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Who is wasting time with a quantity surveyor sef and paying him 5%? Meaning that if my project will cost 100m, I will pay him 5m? You try well well. Nonsense!

Just purchase a software for estimating cost and key in your figures and it will give you the total cost and quantity of each building material required.

S

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Ignorance is bliss.

ikp120:
Who is wasting time with a quantity surveyor sef and paying him 5%? Meaning that if my project will cost 100m, I will pay him 5m? You try well well. Nonsense!

Just purchase a software for estimating cost and key in your figures and it will give you the total cost and quantity of each building material required.

QSFemi:
Ignorance is bliss.

You don't have to agree because you are obviously a quantity surveyor

example of such software?

ikp120:
Who is wasting time with a quantity surveyor sef and paying him 5%? Meaning that if my project will cost 100m, I will pay him 5m? You try well well. Nonsense!

Just purchase a software for estimating cost and key in your figures and it will give you the total cost and quantity of each building material required.