About Calculator

Combit Construction

When it comes to purchasing a property or renovating it, price is a key factor. Whether you’re an investor, small developer, architect, or private client, you’re going to want a ballpark figure for your project before you move to the next stage.

As a builder and property developer, I receive a lot of enquiries every week asking me to provide an approximate figure for project costs. And some clients who are well prepared (i.e. have all necessary drawings and specifications ready) ask me to provide them with a detailed quotation straight away.

Estimate vs Quotation

Every experienced builder should be able to estimate how much a renovation project might cost by just looking at the size of the property, the scale of works required (or as requested by the customer) and the property location. This ballpark figure gives the client a basic idea of what they’re up for, without the builder wasting time and money on a detailed quotation.

To prepare a detailed quotation, a builder needs to spend a lot of time calculating the project using an estimator program or spend money with an estimator company (or a freelancer) to calculate a project for him. Depending on the size of a project, this service might cost between £100 to several hundred pounds. Because of the time and effort involved, detailed quotations are done when the client is serious about getting their project underway.

Combit Construction
Combit Construction

How Realistic will My Estimate Be?

If the customer has specs and drawings already available, the initial estimation figure is likely to be much closer to the real quotation because the builder can reference these as he calculates what’s involved.

However, in case where a customer hasn’t got any planning documents (or they just have some basic drawings without detailed specifications), the ballpark figure is likely to vary wildly between builders for the simple reason that it depends what the builder has allowed for: the quality of work, the scope of the work included in the project and/or how busy or desperate the builder to take on the project.

In short, ballpark figures are a grey area for both customer and builder.

Igor’s Solution

I’ve been managing renovation projects for many years now, and to avoid these discrepancies and grey areas around estimated costs, I’ve developed a Project Calculator to help my clients and me come up with a realistic ballpark figure. Firstly, it’s a timesaver. And secondly, it helps my clients make decisions based on accurate estimations.

My Project Calculator is based on the rates per square metre that I have carefully calculated, based on current costs and my experiences with completed projects.

Each project in my Calculator has its separate rate/sqm of the floor area, which is based on the amount of works included in a typical project of that nature and includes current labour and materials cost.

Combit Construction

Most importantly, the list of materials in my calculator is linked live to the major building merchants such as Selco, Builders Depot, Screwfix, TLC Electrical Supplies, Wickes and others. Any price increases or decreases are automatically reflected in my estimator program which calculates the rates for my Project Calculator. This means that the Calculator is accurate and reflects current prices.

The Project Calculator also has options to add to the basic works such as new kitchen, bathroom, windows, etc.

If the client needs help with planning stage, the calculator would provide with all necessary indications.

Check out my Project Calculator and get a realistic cost for your project right now.

Calculate your project

What type of project do you require? Or a combination of projects

Your location

Floor area (meters)

Additional options

A few more questions...

Design and plan

Contact form

Estimated cost

including: preliminaries, demolition, building works, carpentry, plumbing, electrics, decoration works, 1st fix materials supply and fitting 2nd fix materials

excluding: 2nd fix materials supply such as new doors, kitchen, bathroom appliances, tiles, floor finish

Location:

Outer London

Outer London

Inner London

Area:

Non Conservation

Non Conservation

Conservation

Type of property:

Semi-detached house

Semi-detached house

Detached house

Bungalow

Terraced house

Listed builing:

No

No

Yes

Build quality:

High-end

High-end

Good

Please measure each floor area of your house refurbishment:

1st floor area:
(if required)

Width (W):

Length (L):

Floor area:

0

Ground floor area:
(if required)

Width (W):

Length (L):

Floor area:

0

Total house refurbishment floor area:

0

Please measure floor area/s of your new extension/s:

Back extension area:

Width (W):

Length (L):

Floor area:

0

Side extension area:

Width (W):

Length (L):

Floor area:

0

Total ground floor extension/s floor area:

0

1st floor extension area:

Width (W):

Length (L):

Floor area:

0

Please measure floor area of your 1st floor (for loft conversion):

1st floor area:

Width (W):

Length (L):

Height (H):

Floor area:

0

1st floor area:

Width (W):

Length (L):

Height (H):

Floor area:

0

1st floor area:

Width (W):

Length (L):

Height (H):

Width (W2):

Floor area:

0

1st floor area:

Width (W1):

Length (L1):

Width (W2):

Length (L2):

Height (H):

Floor area:

0

1st floor area:

Width (W):

Length (L):

Floor area:

0

Please measure floor area of your existing garage:

Garage area:

Width (W):

Length (L):

Floor area:

0

Garage area:

Width (W):

Length (L):

Floor area:

0

Garage area:

Width (W):

Length (L):

Floor area:

0

Please measure floor area of your flat:

Flat area:

Width (W):

Length (L):

Floor area:

0

Please specify floor area of your outbuilding:

Outbuilding area:

Width (W):

Length (L):

Floor area:

0

Please specify floor area of your porch:

Porch area:

Width (W):

Length (L):

Floor area:

0

Kitchen fitting:
(Allowance: 25 units. Client supply. Including removal, electrics and plumbing)

1

1

2

Bathroom refurbishment:
(Including removal, electrics and plumbing)

1

1

2

3

4

Chimney breast removal:
(Remove and infill)

1

1

2

3

4

5

6

New boiler:
(Supply and fit)

Combi

Combi

System (including unvented cylinder)

Windows replacement:
(Allowance: 3-bed house. Supply and fit)

to PVCu

to PVCu

to aluminium

Front door:
(Supply and fit)

1

1

2

Sliding door:
(Supply and fit)

1

1

2

Bi-folding door:
(Supply and fit)

4 panels

4 panels

5 panels

6 panels

Underfloor heating (water):
(New ground floor area. Supply and fit)

Underfloor heating (electric):
(In 1st & 2nd floor bathrooms. Supply and fit)

1

in 1 bathroom

in 2 bathrooms

in 3 bathrooms

in 4 bathrooms

When are you planning to start?

Immediately

Immediately

1-3 months

3-6 months

Are you planning to live in during the project?

No

No

Yes

How did you hear about us?

Google

Google

YouTube

Facebook

Instagram

Houzz

FMB

Checkatrade

Recommendation

Have you completed the design phase for this project?

Yes, I have all the necessary designs and approvals

Yes, I have all the necessary designs and approvals

No, I haven't

I´m not sure

Partially

Please leave us your contact details by filling in the form on the next page.

Which of these design stages or approvals will you be needing?

Please fill out this form. Your estimated cost for your project will be on the next step

House refurbishment estimated cost:

excluding additional options and design cost

Ground floor extension/s estimated cost:

excluding additional options and design cost

1st floor extension estimated cost:

excluding additional options and design cost

Loft conversion estimated cost:

excluding additional options and design cost

Garage conversion estimated cost:

excluding additional options and design cost

Outbuilding estimated cost:

excluding additional options and design cost

Porch estimated cost:

excluding additional options and design cost

Flat refurbishment estimated cost:

excluding additional options and design cost

Your total estimated cost:

included additional options costs

included design costs

included additional options and design costs