Construction cost estimates done by professionals appear high to the layman when compared to cost estimates done by local fundis for the same.
The reason this happens is because the local fundis do not categorise the construction cost in terms of low, middle or high cost materials.
They also do not include all the details and accessories that come with the main product.
These details tend to be easily overlooked form a layman point of view in estimating the total cost of construction.

EXAMPLE: ESTIMATING COST OF A DOOR.

A flush door costs approximately KES 2,000 in any given hardware shop in Kenya. When estimating the cost of a door, the fundi will advice the house owner that the doors will cost him/her KES 2,000. The house owner will then budget the cost as KES 2,000 multiplied by the number of doors in the house.

PROFESSIONAL ADVICE.

A professional will advice the house owner that the flush door costs KES 2,000. Also, the flush door comes with a door lock costing KES 1,500 which can be 2 or 3 lever depending on the security level required. In addition to the door and door lock, there will be the cost of door hinges which costs approximately KES 200. A door stopper costing KES 200 will also be required. The door will also require a door frame costing KES 1,500 depending on the design ,wood type and thickness of the door frame required. This door will also require an additional 10% to 20% of the cost as labour plus transport costs.
The same door that a fundi advises the house owner to cost KES 2,000 will now be estimated by the professional to cost KES 6,000.
This is the least it would cost to fix the door. The Fundi gives the cost of a door at the hardware shop while the professional gives the cost of a door from purchasing it from the shop until fixing it in the house.

VARIANCE.

This variance of over 200% in cost estimate is what the fundi fails to advice the house owner. The consequences are as follows;
1. If the money the house owner is using to construct was borrowed from a bank, the house will not be complete due to cost overruns.
2. The house owner would have liked to know the possible options for materials in term of costs available in the market so that they can make an informed decision.
3. In severe cases, total building construction quality is compromised due to poor planning hence building collapse.

REASONS WHY THE COST ESTIMATES VARY.

The reason why the cost estimates vary so much is because of the fundis are generally well-versed with the actual construction techniques as opposed to cost estimation.
read more here
http://www.a4architect.c...ofessionals-appear-high/

@GGK. ..and the door frame. The frame and door lock costs nearly as much as the door itself.

@majimaji..thoughtful addition ..there is painting the door and door frame. There are a few nails for the door frame, polyfilla for the door frame joints.

@mewnza...good addition.wall fasts are mandatory-there are no shortcuts or other options for this.

@earchvoice..true. Information shared makes us all wiser.

Tiggy,

Wait until you have been "eaten" by the fundi's....

You have to equip yourself with information and follow the steps.

You should look to understand the critical spends and create a template for each...which gives you a feel of the average

hapo nimeunga wewe mguu kabisa.sometimes proffesionals overdo it.

All that way for just a K?
Maisha ni ngumu!

professionals DO NOT supply materials, unless you are dealing with a quake or broker .

Yes please where is the garage. I am tired of Jua kali mechanics, every time I visit them, my car comes out with a new disease....