Describe the home
Type, age, size, heating and what is already installed.
About 90 seconds
Free UK whole-home planner
Know what to upgrade.
And what to skip.
Turn five simple answers into a practical home energy plan—with honest cost ranges, likely savings and the right order of work.
No email required
About 3 minutes
Private by design
Potential annual saving
£650
Estimated range £490–£810
31%
less
YOUR BEST NEXT STEPS
Typical scenario
1
Seal the leaky edges
From £320 · do now
£40/yr
2
Top up loft insulation
From £880 · fabric first
£70/yr
3
Price a solar array
4.5 kWp · strong fit
£610/yr
Ready for quotes?
Compare verified options
Check first quote free →
Possible support
£7,500
Eligibility applies
Transparent inputs
Every rate is editable
Ofgem
energy prices
Energy Saving Trust
cost benchmarks
GOV.UK
grants and schemes
MCS
installer standards
ONE HOME · CONNECTED DECISIONS
The technology only works
The technology only works
when the plan works.
Roof, fabric, heating, hot water and electricity affect one another. Hearthline helps you see the whole system before buying one part.
Explore the planning guides →
A CLEARER STARTING POINT
Home upgrades are confusing.
Home upgrades are confusing.
Your plan shouldn’t be.
Hearthline looks at the building as a system, then ranks the work by urgency, fit and likely value.
Stress-test the numbers
Switch between conservative, typical and optimistic scenarios.
No false precisionTake the next step
Save the plan, check grants and compare like-for-like quotes.
You stay in control
INSIDE YOUR PLAN
More useful than
More useful than
a single payback number.
PERSONALISED ROADMAP
The right work, in the right order
Quick wins, fabric upgrades and clean technology are sequenced so one project prepares the home for the next.
Now
Controls + draughts
Next
Insulation
Later
Solar + clean heat
ways to test the plan
Conservative, typical and optimistic—because weather and behaviour change real outcomes.
Possible support
£7,500
Current help, shown in context
Nation and heating type shape what may be available.
QUOTE-READY CHECKLIST
Know what a good quote should include
Carry a practical checklist into every installer conversation.
- ✓ Assumptions stated
- ✓ Performance model
- ✓ Warranty and exclusions
- ✓ Certification checked
ONE JOURNEY, THREE LEVELSPlan for free.
Plan for free.
Pay only when the project gets complicated.
Start without an account, keep useful results in My Hearthline, then unlock multi-quote and project controls only when you need them.
Find the right direction
Use every calculator, grant route and first quote check without handing your details to an installer.
Build my free plan →Keep one private record
Save a home profile, plans, checks and practical actions. Account creation remains optional.
Open my workspace →Compare and control the project
Normalise up to four quotes, expose missing evidence and keep the decision through handover.
See founding access →
FREE FIRST QUOTE CHECK
Find what is missing
Find what is missing
before price decides.
Put one solar proposal on a consistent basis, see the assumptions and evidence it does not contain, and turn the gaps into a written installer email.
- 01Normalise the proposalSee price per kWp, generation per kWp and the written evidence score.
- 02Expose the gapsCheck generation, shading, battery, protection, warranty and scope evidence.
- 03Send better questionsGenerate a ready-to-copy request for the missing information.
Prefer files? Quote Pack · £19 once
EXPLORE A REALISTIC EXAMPLE
Different homes need
Different homes need
different answers.
See how the order changes with the building. These examples use current published benchmarks—not promises.
1930s mid-terrace · 92m²
Fabric first, then generate
Strong fit
Potential saving
£650/yr
First phase
£4,400
Bill reduction
31%
1
Draughts + controls
Low cost · comfort first
2
Loft + cavity walls
Prepare the fabric
3
4.5 kWp solar array
Strong bill-saving fit
BUILT TO BE CHECKED
Trust the method,
Trust the method,
not the marketing.
Hearthline is funded by its own optional paid tools. The free planner remains useful on its own, and product sales never change which improvements appear first.
Read the full methodology ↗Editable assumptions
Use our current defaults or replace every tariff and consumption figure with your own.
Ranges, not guarantees
Real homes, quotes and behaviour vary. We show uncertainty instead of hiding it.
Commercial separation
Recommendations are calculated independently. Paid Hearthline products are offered only where they match the next decision.
Quarterly review cycle
Tariffs and schemes are checked every quarter; core cost benchmarks every six months.
DECIDE BEFORE YOU BUY
Guides built for
Guides built for
the decision point.
Direct answers, comparison tables and source-backed checklists for choosing the work and testing installer quotes.
WHOLE-HOME ORDER
What should you upgrade first?
Sequence defects, controls, insulation, solar and clean heating without creating expensive conflicts.
Read the guide →
PROPERTY-SPECIFIC ROUTE
What should a 1930s semi improve first?
Check cavity walls, suspended floors, loft ventilation and boiler timing.
Build the three-stage route →
COMPARE ROUTES
Insulation, solar or heat pump first?
Choose from the home’s real constraint, renovation trigger and energy use.
Compare them →
QUOTE CHECKLIST
Is this heat-pump design complete?
Check heat loss, flow temperature, emitters, hot water and scope.
Check a quote →
FREE CALCULATOR
Will a heat pump cost less than gas?
Use your tariff and the proposed seasonal performance to find the break-even point.
Compare running costs →
QUOTE CHECKLIST
Does this solar quote add up?
Separate generation, self-use, export, battery value and exclusions.
Check a quote →
GOOD QUESTIONS
Straight answers.
Is this an EPC assessment or installer quote?+
No. Hearthline is an early planning tool. Confirm suitability, system design, costs, savings and grant eligibility with qualified professionals.
How accurate are the savings?+
They are indicative scenarios. Your actual result depends on weather, occupancy, building fabric, system design, energy rates and how you use the home.
What happens to my answers?+
Your plan stays in this browser unless you deliberately choose “Save to My Hearthline”. Clearing this site’s browser data removes the local copy. An account is optional, and saved plans are not sent to installers.
How does Hearthline make money?+
Hearthline sells optional digital decision tools and may earn referral fees from clearly labelled paid partner links. Commercial relationships never change your planner ranking or estimate, and planner answers are not sent to partners. See how Hearthline makes money.
Why should I get more than one quote?+
Design assumptions and included work vary. Comparing at least three like-for-like quotes helps expose exclusions and unrealistic performance claims.
Can I use this for an older or listed home?+
Use it only as an early guide. Historic, listed, solid-wall and damp-affected homes need building-specific moisture and conservation advice.
YOUR HOME. YOUR NUMBERS.
Make the next upgrade
Make the next upgrade
the right one.
Free, private and ready in about three minutes.