Energy Efficiency
The cheapest time to make a house more efficient is while the walls are already open. When we are replacing windows, re-siding or remodeling a room, the insulation, air sealing and glazing decisions are right there in front of us — and doing them then costs a fraction of coming back for them later.

Scope
What the work involves
Insulation
Walls, floors and attic spaces insulated properly while they are accessible, rather than patched around existing services.
Air sealing
Sealing the gaps that actually move air — around openings, penetrations and top plates. Draughts cost more than most people assume.
Efficient windows and doors
Glazing and frames specified for your climate and elevation, fitted and flashed so the performance survives the installation.
Lighting and controls
Efficient lighting and controls specified as part of the electrical scope, carried out by licensed electrical trades.
Examples
The kind of work we take on
These photographs show the type of energy efficiency work described above.



How it works
From first call to final walkthrough
- 01
Talk it through
Tell us what you want to change. We ask the questions that decide the price before anyone comes out.
- 02
Define the scope
We measure, check what is behind the walls where we can, and put the work in writing — what is included and what is not.
- 03
Build it
A scheduled crew, a sequence you can follow, and a clean site at the end of each working day.
- 04
Final walkthrough
We walk the finished work with you and close out anything on the list before we call it done.
Questions
Before you call
Will this cut my energy bill?
It generally helps, but by how much depends on your house, your climate and how you heat and cool it. We will not put a percentage on it that we cannot stand behind.
Do you do HVAC or solar?
Not ourselves. HVAC, electrical and solar are separate licensed trades, and we bring in appropriately licensed contractors for them as part of a project.
Is there a rebate for this work?
There are California and utility programmes that change often. We will tell you what we know and point you at the current programme rather than promise you a specific rebate amount.
Get started
Request an estimate for energy efficiency
Tell us the basics and we will call to fill in the details and confirm whether the project is in an area we cover.
Available in Los Angeles, CA · San Diego, CA · Bay Area, CA
Get your free estimate
Four quick questions · about a minute · no obligation
Step 1 of 4
Do you own the home?
Everyone on the title needs to be there for the walkthrough, so it helps to know up front.
Prefer to talk?(310) 708-1466
Also from JBC
Other services

Kitchen Remodeling
Layouts, cabinetry, counters and lighting, planned around how you actually cook.
Learn more
Bathroom Remodeling
Tubs, showers, tile, vanities — and the waterproofing behind them.
Learn more
Interior Remodeling
Flooring, walls, ceilings, built-ins and whole-room refreshes.
Learn more
Window Replacement
Replacement windows measured, installed and sealed properly.
Learn more
Siding Replacement
Exterior cladding replaced, with the sheathing underneath checked first.
Learn more
Landscaping
Yards, hardscape and outdoor living, built alongside the work on the house.
Learn more