Renovating, Retrofitting, and Transforming Existing Homes into Exceptional Green Homes

Better Built Deep Green Home Renovations by BPC Green Builders

BPC serves parts of Fairfield, Litchfield, and New Haven Counties, Connecticut and Westchester, Putnam, and Dutchess Counties, New York

Existing home retrofitted and renovated into a Green Home in CT

BPC Green Builders Converts Existing Homes into Certified Green Homes

BPC Green Builders transforms existing homes into homes that can be certified to meet rigorous green building industry standards. The industry term for this process is Deep Green Retrofitting. It is most cost-effectively done as part of a whole house renovation or major remodeling project.

The homes BPC renovates and remodels are sustainable and offer numerous benefits that only green homes can offer, including exceptional energy efficiency, unsurpassed comfort, lower cost of ownership, and healthy environments.

Can Your Home be Converted into a Green Home?

Most, but not all, existing homes can be converted into green homes that can be certified as meeting one or more established residential green building standards.

To find out if your home is a good candidate, the first step is to have BPC evaluate it. BPC can determine if your home can be converted into a green home and what would be involved.

BPC offers this initial evaluation as a complimentary service for homeowners serious about a green home renovation. 

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“We were surprised and delighted to find in Mike Trolle, of BPC Green Builders, a local builder who not only gave us the kind of house we wanted, but helped us figure out what that was in the first place. His ideas about what a house needs — and doesn’t need — were invaluable. He even helped us find an architect whose ideas were in sync with ours.”
Tom and Stacy, Westport, Connecticut
“We found your expertise in building science to be of great help in planning the project and in the selection of appropriate equipment and materials. BPC’s management of the subcontractors and communication with us always met our expectations. Moreover, BPC was conscientious and ethical in all aspects of the work. We would be pleased to recommend BPC without reservation.”
Christine and Monte, Bethany, Connecticut
“As architects, it has also been a sincere pleasure to work for Mike. He is an extraordinary client who has been able to utilize our skills and experience. The working relationship that we have developed is based upon trust and confidence, and has been tested by the realities and trials of construction.”
Thomas RC Hartman, AIA, Coldham Architects LLC
“BPC is in the forefront of this commitment. Our company has benefited from our professional and personal interaction with Mike and Chris Trolle. From client introduction to final walk through, the drive for total customer satisfaction is clear.”
Dean Demague, High Performance Energy Solutions

The primary requirement for your home to be a good candidate for a green home renovation is if the home’s “Envelope” can be reconfigured to meet one or more of the green certification standards.

home envelope illustration Your home’s “envelope” includes the walls, floors, foundation, and ceilings that separate your home’s conditioned (heated and cooled) areas from the outside or from the areas of your home that are not conditioned, such as a garage.

Once we have assessed your home’s green potential, we will discuss with you the type and magnitude of renovations and green retrofitting needed to meet your goals for energy efficiency, sustainability, health, air quality, durability, cost, and more. We also discuss any interior reconfiguration or additions you may wish to include as part of the green renovation retrofit and whole-house renovation.

Renovating Homes with Deep Green Retrofits is a Team Effort

For almost any type of whole house renovation, and more so for one that includes a deep green retrofit, it’s essential for the homeowner, BPC, and the project’s architect to work as a team from the very start of the project.

If you don’t already have an architect, BPC can refer you to one or more architects we have worked with and believe will be a good fit for your project. If you have an architect, but they don’t have experience designing green homes, BPC can provide the guidance they may need. In all cases, it is essential the entire team works together from the start.

Green Home Renovation Projects are Different from Traditional Whole House Renovations

From day one, the deep green energy retrofit work must be an integral part of the project. Certain elements that make a home green cannot be added as an afterthought. They must be part of the home renovation’s DNA.

Converting a home into a green home always involves changes to the home’s envelope; its heating, cooling, ventilation, and hot water systems; building materials and product selections for the project, and so on. There are also engineering, green building standards, and third-party verification aspects that are unique to green retrofit home conversions.

Renovating and Remodeling Your Home at the Same Time

Undertaking a deep green retrofit is the ideal time to renovate or remodel your entire home. The converse is also true. Undertaking a whole house renovation or remodel is the perfect time to convert your existing home into a green home. Because of overlaps in what is done for each, combining a whole house renovation and remodel with a deep green energy retrofit reduces costs, duplication of effort, waste, time, and money compared to doing them as two separate undertakings.

In other words, doing a green retrofit at the same time you renovate and remodel your whole home saves you time and money.

Deep Green Retrofit Renovations are Extra Green

Deep green retrofits follow the three prime directives of living green.

recycoe symbol Reduce

Converting an existing home to a green home reduces the amount of new building material required to create a green home and reduces the amount of materials that would go into a landfill if you tore down the home and built a new one.


With many existing homes, some amount of the existing home’s materials can be reused within the scope of the green renovation and energy retrofit. Some elements of our existing home that you can’t or don’t want to reuse, like doors, hardware, windows, appliances, etc. can be donated to non-profits and other organizations. They then can reuse the materials for other building and renovation projects, or the materials can be sold to other homeowners or businesses to reuse in their own projects.


When your existing home is renovated to be a green home, instead of unused material and construction waste going to the landfill, additional efforts are made to recycle anything recyclable.

Why Choose BPC Green Builders

Established in 1998, BPC was one of the first green builders in the area. Ever since BPC has been leading the way for other green home builders to follow.

All BPC homes meet or exceed established green building certification requirements, standards that far exceed local building codes for energy performance, durability, health, comfort, and in many other ways.

BPC brings together its deep appreciation of traditional quality craftsmanship with the latest green building and building science best practices.

BPC’s Standards Are High and Award-Winning

All homes BPC builds or renovates today are at a minimum constructed to meet or exceed DOE’s Zero Energy Ready Home (ZERH) certification standards. This standard is both higher and more comprehensive than the EPA’s ENERGY STAR® home certification criteria. Green homes certified as ZERHs can achieve net-zero energy use with the installation of solar panels.

Many homes BPC builds are certified to meet even higher green building certification standards, including the most rigorous. For example, BPC has built homes certified as PHIUS Passive Houses, homes certified at the top Emerald tier of the National Green Building Standard, and homes certified at the top Platinum tier of the USGBC LEED for Homes program.

In addition to BPC homes earning rigorous green building certifications, many have also won local, regional, and national green home building industry awards.

What BPC Brings to the Table

  1. Exceptional knowledge of green building’s leading-edge strategies, materials, and best practices
  2. An extensive, award-winning, 20 plus year track record of meeting and exceeding green building certification standards, including the highest ones
  3. A no-cost evaluation of your existing home’s potential for a green home retrofit
  4. Providing you and your architect the information and guidance you need about green building certification standards so you can select the right green goals for your home
  5. Architectural design, engineering, and other green building support before and during design and construction
  6. Green home building material, systems, and product selections
  7. Preliminary budget guidance, interim, and final budgeting
  8. Computer modeling to confirm that your home renovation plans will meet the green performance standards desired
  9. Project and construction planning and coordination
  10. Green subcontractor selection and recommendations
  11. Obtain municipal building permits and approvals
  12. Construction and construction management
  13. Managing all building inspections, green home verifications, and certifications
  14. Warranty work if needed

The Bottom Line is Green

Having BPC Green Builders on the team that converts your existing home into a green home ensures you are getting the best home possible and the maximum benefits green homes can offer. Moreover, BPC guarantees your new green home will meet the home’s planned and contracted performance and certification goals.

Some of BPC’s Green Home Renovation and Green Retrofit Projects

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