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Bellingham Heating & Cooling — Bellingham's Energy Savings Team
Aging outdoor heat pump unit next to its replacement during a changeout

Installed price · verified 2026-09-04

Heat pump replacement cost

$4,000–$8,000 Installed replacement of an existing ducted air-source heat pump, reusing serviceable ductwork and, where sized correctly, the existing circuit. A second local source publishes $4,900–$11,700 for ducted heat pump work here, which is the same job with duct or electrical scope added., before rebates. Here is what decides where in that range your house lands.

Heat Pump Replacement Cost in Whatcom County (2026) in Bellingham

Installed replacement of an existing ducted air-source heat pump, reusing serviceable ductwork and, where sized correctly, the existing circuit. A second local source publishes $4,900–$11,700 for ducted heat pump work here, which is the same job with duct or electrical scope added.

Simple job
$4,000
Complex job
$8,000

Installed price before rebates — equipment, labour, materials, permit and startup. The federal §25C tax credit contributes $0 in 2026: it terminated for anything placed in service after December 31, 2025.

Range benchmarked 2026-09-04 against published local pricing. Your quote is fixed before work starts — no hourly surprises.

  • WA L&I #BELLIHC808NM Active registration — verify it with the state
  • $30,000 bonded Surety bond on file with L&I
  • $1,000,000 insured General liability coverage
  • Local since 2020 Owner-operated in Whatcom County
  • We pull the permit City of Bellingham or Whatcom County, and we meet the inspector

What moves your number

Most impactful first. These are the questions we ask on the phone, and they are the reason a range exists at all.

What actually carries over from the old system
reusable ducts, pad and circuit keep a replacement near the bottom of the band
A true like-for-like replacement is the cheapest heat pump work there is, because the ductwork, the equipment pad, the electrical circuit and the thermostat wiring already exist and have already been inspected once. What rarely carries over is the refrigerant line set, since older systems ran R-22 or R-410A and modern equipment does not tolerate contaminated lines. We evaluate the lines rather than assuming either way.
Whether the old system was sized correctly in the first place
right-sizing can move equipment cost up or down by a half to a full ton
A replacement is the one chance you get to fix a sizing mistake, and in Whatcom County the common mistake is oversizing. Bellingham designs to 19°F, and a system chosen for a Seattle-style rule of thumb or for the largest unit the old contractor had on the truck will short-cycle in the 40°F weather that dominates our winter. A load calculation before ordering equipment costs little and occasionally saves a whole ton of capacity.
Cold-climate performance and the PSE upgrade rebate thresholds
unlocks a $1,500 rebate, or $2,400 with Efficiency Boost, on qualifying ducted replacements
PSE’s heat pump to heat pump upgrade rebate is written for exactly this project, but only for ducted systems and only when the existing unit is out of its original manufacturer warranty. The new unit must also hit a COP of at least 1.75 at 5°F with rated capacity at 5°F of at least 70% of capacity at 47°F. Ductless replacements are explicitly not eligible. Equipment that meets those numbers costs more and pays part of it back.
Controls, lockouts and the auxiliary heat setup
a rebate-compliant control setup is a modest line item and a condition of payment
PSE requires the compressor lockout disabled, or set at 0°F or below, and electric resistance auxiliary heat locked out by an outdoor sensor or weather-informed control, recommended at 35°F or below. That is a commissioning task, not a box on a shelf. It is also the single most common reason a rebate application on a replacement gets rejected.
Removal, recovery and disposal of the old equipment
included in our quotes, and a real cost either way
Refrigerant has to be recovered rather than vented, and the old condenser and coil have to go somewhere. That is labour, certified recovery equipment and dump fees. If a competing bid is notably cheaper, check whether haul-away and recovery are in the number.

What appears on a real quote

Line by line, the way we scope it. If a quote you are holding is a single lump sum, this is the list to ask them to break out.

Heat Pump Replacement Cost in Whatcom County (2026) quote line items and typical ranges in Bellingham, WA
Line item Typical range What it is
Replacement outdoor unit and matched indoor coil the dominant line on a like-for-like replacement —
New line set, or flush and pressure-test of the existing one quoted after evaluating the existing lines —
Filter drier, transitions and plenum adaptation included; older coil cabinets rarely match new equipment exactly —
Electrical: reuse of the existing circuit, or a new one where the load has changed $250–$900 for a new dedicated circuit HomeGuide. Performed by a licensed electrical contractor.
Duct repair or resizing where airflow does not meet the new equipment quoted only if measurement shows it is needed —
Thermostat and lockout controls set to the rebate requirements included in commissioning —
Refrigerant recovery and disposal of the old system included —
Mechanical permit and inspection per the governing jurisdiction’s fee schedule —
Startup, airflow verification and charge documentation included —
Diagnostic trip charge on the assessment visit $89.99, refunded as company credit if you accept the bid —

Line items are quoted against your house, not averaged. Your written quote is fixed before work starts.

Three worked examples

Same work, three different houses. The arithmetic runs from the installed price, through the programs that apply, to what you write a cheque for.

Fourteen-year-old ducted heat pump in a 1990s house, compressor failed, ducts and 200-amp panel in good shape

Installed price
$6,500
Rebates applied
  • PSE heat pump to heat pump upgrade rebate: $1,500, if the new unit meets the 5°F COP and capacity thresholds and the old unit is out of warranty
  • Federal §25C: $0
You pay
$5,000

The cleanest replacement case there is. PSE requires the installing contractor to be in its network, so confirm that before treating the $1,500 as certain.

Failed ductless mini split serving a 1970s baseboard-era home where the original baseboard is still on the walls

Installed price
$7,000
Rebates applied
  • PSE heat pump to heat pump upgrade rebate: $0 — ductless systems are explicitly not eligible
  • PSE electric resistance conversion rebate: $0 — a heat pump already serves the main living area
  • Daikin ductless instant rebate: $450–$750
  • Federal §25C: $0
You pay
$6,250–$6,550

The awkward case, and worth stating plainly: replacing a ductless system with another ductless system currently falls between both PSE programmes. Manufacturer instant rebates are the only reliable money on the table.

Income-qualified household, pre-1990 home, twenty-year-old ducted heat pump replaced with a cold-climate ducted system

Installed price
$7,800
Rebates applied
  • PSE upgrade rebate with Efficiency Boost: $2,400
  • PSE weatherization instant rebates on attic insulation bundled with the job: $1.75 per sq ft up to $3,500
  • Federal §25C: $0
You pay
$5,400 before any weatherization credit

On a twenty-year-old system it is usually worth doing the envelope at the same time, because a tighter house may need less equipment. PSE reports roughly half its customers qualify for Efficiency Boost.

No example includes a federal tax credit, because there is none to include for a 2026 install. The largest single line in most of these is Puget Sound Energy's $1,500 electric-resistance conversion rebate, which is contractor-gated — PSE requires the installer to be inside its network, so ask us to confirm status for your project before you count on it.

Rebates that come off this price

  • $1,500

    Available now

    $2,400 with Efficiency Boost. Ducted systems only — ductless is not eligible.

    Paperwork:
    We file it
    Deadline:
    No published end date — tariffed and subject to change
    Verified:
    2026-09-04 · source
  • Raises other PSE rebates

    Income-qualified

    Heat pump $1,500 → $2,400 · heat pump water heater $1,000 → $1,100 · smart thermostat $75 → $175.

    Paperwork:
    We file it
    Deadline:
    Ongoing
    Verified:
    2026-09-04 · source
  • Midstream HVAC Equipment Discount

    Puget Sound Energy (with ICF)

    $300–$600

    Available now

    Tier 1 $300 (SEER2 ≥15.2 / HSPF2 ≥8.1, retrofit only) · Tier 2 $400 (SEER2 ≥15.2 / HSPF2 ≥8.5) · Tier 3 $600 (SEER2 ≥16 / HSPF2 ≥9.5).

    Bellingham note: Whether this discount can be combined with the $1,500 conversion rebate is unconfirmed: PSE’s conversion page says its rebate "cannot be combined with any other rebates except where noted", while PSE’s heating hub tells customers to ask their contractor. We quote it separately and confirm with a PSE Energy Advisor before counting it toward your total.

    Paperwork:
    Comes off the equipment price
    Deadline:
    No published end date
    Verified:
    2026-09-04 · source
  • $0.20–$2.50 per sq ft

    Available now

    Attic R11-or-less → R49 $1.75/sq ft up to $3,500 · wall R0 → R13 $2.50/sq ft up to $5,000 · floor → R30 $2.50/sq ft up to $5,000 · air sealing $0.20/sq ft up to $400 each for attic and floor · duct sealing up to $1,000.

    Paperwork:
    We file it
    Deadline:
    No published end date
    Verified:
    2026-09-04 · source
  • $0 — terminated

    Ended

    Historically 30% of cost, up to $2,000/year for heat pumps and heat pump water heaters. Gone. The One Big Beautiful Bill (P.L. 119-21, enacted July 4, 2025) accelerated its termination.

    Paperwork:
    You file it
    Deadline:
    Terminated — property placed in service after December 31, 2025 does not qualify
    Verified:
    2026-09-04 · source

Every Bellingham rebate, with the source and the date we checked it →

Run your own numbers

A range, not a quote — and the arithmetic is shown so you can check it. Every band below is a published installed price, linked at the bottom.

Sources, all checked 2026-09-04: ductless by zone, ducted in Bellingham, local aggregator range, panel upgrade, dedicated circuit, heat pump water heater. Electrical work is performed and permitted by a licensed electrical contractor — we hold a general contractor registration, not an electrical one.

The work itself

Heat Pump Replacement

Replace a tired system once, correctly, instead of paying for a third repair on equipment that will not see another winter.

See how we do it — process, permits, equipment and timeline →

Talk it through — (360) 592-3824

Heat Pump Replacement Cost in Whatcom County (2026) — questions we get asked

What does it cost to replace a heat pump?
$4,000 to $8,000 installed for a ducted replacement that reuses serviceable ductwork, per local published pricing. A second local source quotes $4,900 to $11,700, which reflects jobs that also include duct or electrical work.
Repair or replace?
Repair if the unit is under about ten years old and the failed part is not the compressor; replace if it is older, out of warranty, and the quote is a large fraction of a new system. Minor heat pump repairs are published at $150 to $650, while a compressor or coil replacement outside warranty runs $650 to $2,500 and up, which is the point at which putting the money toward new equipment usually wins.
Is there a rebate for replacing an old heat pump?
Yes for ducted systems: PSE’s heat pump to heat pump upgrade rebate pays $1,500, or $2,400 with Efficiency Boost. The conditions are strict — the existing system must be centrally ducted, all-electric and out of its original manufacturer warranty, dual-fuel is excluded, and ductless is not eligible at all.
Can I reuse my existing refrigerant lines?
Sometimes, and only after they are evaluated. Lines that carried R-22 or that have been open to atmosphere carry oil and contaminants that will damage new equipment, and line size has to match the new system. We check size, condition and integrity, then either flush and pressure-test or replace, and we tell you which before the order goes in.
Do I get a federal tax credit for replacing a heat pump in 2026?
No. §25C ended for property placed in service after December 31, 2025 under P.L. 119-21, as confirmed by IRS FS-2025-05. There is no federal credit available for a 2026 replacement regardless of equipment efficiency.
Do you have to pull a permit for a replacement?
Yes. A like-for-like change-out is still permitted mechanical work, and we pull the permit and meet the inspector. The issuing office is City of Bellingham Building Services inside city limits and Whatcom County Planning and Development Services for unincorporated addresses.

Get the number for your house

A range tells you whether to keep reading. Tell us about the house and we will tell you which end of it you are at, what the rebates take off, and what the written quote will say.

Or call or text (360) 592-3824. Estimates carry the standard $89.99 trip charge, refunded as company credit when you accept the bid. We do not sell or share your details.

Range benchmarked 2026-09-04 against published local pricing · All published cost ranges

Ready for a straight answer on your house?

Tell us what you have now and what you want it to do. We will tell you what fits, what it costs, and which rebates you actually qualify for — before anyone comes out.

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