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Water Lilies Calculator

Get clear on your financial and sustainability investment.

Dear friends. This calculator allows you to estimate the financial investment into Waterlillies, as well as the impact of your carbon footprint. Please complete the input fields in blue. The assumptions in yellow are default assumptions. Feel free to override these assumptions if you have more bespoke data. Once you have made your input hit the minus (-) sign to see your inputs pop up. The outputs in dark green will automatically change as you change the inputs. You can generate your own report once you have completed it. Happy calculating!

Inputs required

change

: change

: change

£


£
change



change



change


%
change


%
change

£


£
change
(lodger, replaced office rent, Air B&B, etc)

£


£
change

( years )


( years )
change



change

Assumptions


%
change


%
change

( months )


( months )
change

( months )


( months )
change


Generate Free Report

Outputs

Payments & savings during build


£



£


£


Total mortgage payments during the build


£ per month


£

Stamp Duty Land Tax savings


£


£



£


£


£

Total Savings


£


£ per month



kg CO2 per yr

That is the equivalent of gigantic balloons the size of an average bedroom full of CO2, each year not released in the atmosphere


Assumptions and Disclaimer

Calculator

The information presented on this website is based on data available at the time. Design, specification, features, price, availability and release dates are subject to change without notice.

It is there to give you a snapshot of the financial and carbon emission implications of buying and building your Bright Green Futures home, and will give you an idea of how different choices may influence your finances and carbon footprint. What you will pay in the end for each element may go up or down depending on your choices, timeframe and other detail.

Build Costs and Time Frame

The build cost estimate of the fit out include materials, labour, plant hire and fees that are not already covered by the Bright Green Futures Package (e.g. services, landscaping, architect drawings), and were based on cost estimates by cost consultant RLB for fit out by a main contractor at a UK standard specification. Savings from self-management or employing a project manager use pro rata typical saving proportions based on the House Builders Bible by Mark Brinkley and the Buildstore Construction Cost Calculator. The calculator assumed 20% savings for a budget fit out and 30% uplift for a high end fit out. The total cost estimates exclude VAT. VAT on building materials can be reclaimed after completion. Building contractors are not required to charge VAT for their work on a new build.

The building costs and time frame can only be a rough estimate. There are many variables which cannot be included at this stage, as they depend on your personal choices. If you buy in as part of the workshops we will take you through the many choices you have and guide you in how you can reduce your budget. Depending on your choices the construction costs may go up or down. Whilst care has been taken to make these estimates as accurate as possible, Bright Green Futures Ltd does not accept any liability for the estimates you create with this tool.

Carbon Savings

The carbon savings is the reduction in carbon emissions from your house compared to if you were living in a conventional house of the same size that is not design to the the high sustainability standard Bright Green Futures’ homes have. This may change depending on your detailed choices and the way you will use your home. We will guide you these choices and recommend literature on which basis you will be able to further reduce your carbon footprint. The total amount is from savings from home energy use only, and does not include carbon savings from transport, recycling and food, which could triple the savings depending on your household’s lifestyle choices.

The impact of energy cost saving has not been included and would increase the savings made over time and make the home resilient to external factors such as peak oil.

Other Assumptions underlying the calculator
  • We have assumed you would be on an interest only mortgage during your self-build, which is what most people do.
  • Estimated end values of homes are based on the Red Book Valuation Report by Huthwaite Freshton Wright Ltd, March 2019.
  • Mortgage set up fees or cost of insurance are not included.
  • Carbon savings are calculated as the difference in carbon footprint from energy used for heat power in a typical UK home of the same size.

Report

Dear ,

This calculator is here to help you understand how building a Bright Green Futures home will impact you financially and if it is a good investment. You will be able to model how different choices, such as the home you choose and the level of DIY you would like to do could impact your total costs and finances in the long term.

This report will give you a snapshot of what the calculator estimates your finances will look like, based on the assumptions you have input and the assumptions underlying the calculator. Feel free to experiment with different assumptions and inputs. Then you will see the implications on both your finances and your carbon footprint.

The assumptions which you cannot change, as well as the ones that are embedded in the calculator, are at the bottom of the web-page, as well as the disclaimer.

The Inputs Required

The assumptions are based on your inputs in the calculator.

You are looking at purchasing Plot , with . Your deposit amounts to £. You expect to be able to complete the plot purchase within 3 months. You are planning to . You are planning to do of the work as DIY. The level of finish you are aiming for is .

We assume that your current rental or mortgage payments amount to £/month. We here assume that you are paying your new mortgage off within yrs after moving into your new home.

For Stamp Duty Land Tax purpose, you have stated that .

Other Assumptions

The calculator assumes that you take out an interest only self-build mortgage at % annually interest. After you have had your self-build mortgage for 2 yrs and complete your build, you can normally remortgage penalty free and go onto a normal mortgage. It is assumed that your annual interest rate then would be %.

To estimate the total and peak mortgage payments during your build it is here assumed that it will take months from purchasing your plot for Bright Green Futures to complete the shell and months for you to complete the fit out.

Outputs

Costs and savings during the build

Your total cost of your home is estimated at £. This is the sum of your price for the plot, parking and registration at £, the Bright Green Futures Package at £ and your estimated fit-out costs at £.

With a deposit of £ you will need to borrow £. You will only ever pay the % annual interest rate on what you have drawn. In this way you won’t be making any payments until you have used up your deposit and start drawing onto your mortgage. Based on a months period from plot purchase to complition of shell and assuming that you will then complete your home and move in within months, your total mortgage payments over the course of the build are estimated to amount to £ in total. We have assumed you will first use your deposit and only draw on your mortgage once needed.

Compared to purchasing a home of the same value as the estimated end value of the home you chose, we estimate that you will make Stamp Duty Land Tax Savings (SDLT) of £.

Your financial situation after moving in

We have assumed that after moving into your home you will be remortgaged to a conventional mortgage with an interest rate of %. Based on a yr repayment period, your mortgage payments post construction are estimated to amount to £/month.

Taking into account the SDLT savings and the self-build mortgage payments you will make during the build, the total savings the calculator estimates you will make by building your Bright Green Futures home compared to buying a home of the same end value is estimated at £ in total.

Carbon Savings

The carbon savings you will make amount to kg CO2/yr. How much do you think this is? It is the equivalent of gigantic balloons the size of an average bedroom full of CO2, each year not released in the atmosphere. Something to be proud of? Yes!

And that is not all. That is only one benefit. In addition your bills will be low, your home will be future-proofed and your indoor comfort levels are likely to be very high!

Plus the carbon savings is the reduction in carbon emissions from your household energy (heat and power) compared to if you were living in a conventional house of the same size that is not designed to the high sustainability standard Bright Green Futures’ homes do. The savings do not include carbon savings from transport, recycling and food. If we include these aspects we estimate your carbon savings would be about 2 or 3 times as high depending on specific lifestyle choices.

Thank you so much for using the calculator. We hope it has been useful for you. This is only a broad estimate. Please do your own research to back it up. If you would like to send any feedback, it will be gratefully received. Please email steffie@brightgreenfutures.co.uk.

With much love,
The Bright Green Futures Team

Appendix: Assumptions and Disclaimer

Calculator

The information presented on this website is based on data available at the time. Design, specification, features, price, availability and release dates are subject to change without notice.

It is there to give you a snapshot of the financial and carbon emission implications of buying and building your Bright Green Futures home, and will give you an idea of how different choices may influence your finances and carbon footprint. What you will pay in the end for each element may go up or down depending on your choices, timeframe and other detail.

Build Costs and Time Frame

The build cost estimate of the fit out include materials, labour, plant hire and fees that are not already covered by the Bright Green Futures Package (e.g. services, landscaping, architect drawings), and were based on cost estimates by cost consultant RLB for fit out by a main contractor at a UK standard specification. Savings from self-management or employing a project manager use pro rata typical saving proportions based on the House Builders Bible by Mark Brinkley and the Buildstore Construction Cost Calculator. The calculator assumed 20% savings for a budget fit out and 30% uplift for a high end fit out. The total cost estimates exclude VAT. VAT on building materials can be reclaimed after completion. Building contractors are not required to charge VAT for their work on a new build.

The building costs and time frame can only be a rough estimate. There are many variables which cannot be included at this stage, as they depend on your personal choices. If you buy in as part of the workshops we will take you through the many choices you have and guide you in how you can reduce your budget. Depending on your choices the construction costs may go up or down. Whilst care has been taken to make these estimates as accurate as possible, Bright Green Futures Ltd does not accept any liability for the estimates you create with this tool.

Carbon Savings

The carbon savings is the reduction in carbon emissions from your house compared to if you were living in a conventional house of the same size that is not design to the the high sustainability standard Bright Green Futures’ homes have. This may change depending on your detailed choices and the way you will use your home. We will guide you these choices and recommend literature on which basis you will be able to further reduce your carbon footprint. The total amount is from savings from home energy use only, and does not include carbon savings from transport, recycling and food, which could triple the savings depending on your household’s lifestyle choices.

The impact of energy cost saving has not been included and would increase the savings made over time and make the home resilient to external factors such as peak oil.

Other Assumptions underlying the calculator