23 HVAC contractors filed 2,098 furnace and AC replacement permits on homes in the City of Bismarck from October 2023 to September 2026; 19 filed one in the last 12 months. The middle filed job value was $4,435. The most active in the last 12 months were Bismarck Heating & Air Conditioning (322 permits), H. A. Thompson & Sons Inc (98) and Advanced Mechanical Inc. (90); busy is not the same as careful. Side by side: permits filed, share finished and permits in the last 12 months for each firm. Pick what you value and the list re-orders.
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Top 5 by furnace and AC replacement permits filed in the last 12 months. This is volume, not quality: a busy firm is not necessarily a careful one.
The 3 ZIP codes with the most furnace and AC replacement permits on homes from October 2023 to September 2026. Each opens permits by trade and the most active firms there.
Before you move a slider, the list is in a default order built only from the permit record: how much of each firm’s record is this kind of job (weight 30), how often its permits reached completion (25) and how many permits it filed in the last 12 months (15). Each measure is ranked against the other 23 firms and pulled toward the middle when a record is short.
The order comes from the Bismarck permit file, not from reviews: 19 of 23 HVAC contractors filed a permit in the last 12 months and 25% of their permits a year or more old were finished. Nobody pays to be listed or to move up, and there are no star ratings or reviews. The sliders and presets change the weights, and the order changes with them. How the records work in Bismarck.
We do not rate contractors. In this page’s default order, which uses only the permit record through Sep 2026, the top 3 are Advanced Mechanical Inc. (244 permits, 51% finished), H. A. Thompson & Sons Inc (280 permits, 38% finished) and Coles Plumbing and Heating (34 permits, 90% finished). By permits filed alone, the most active is Bismarck Heating & Air Conditioning with 946.
23 firms are on the list; the busiest filed 322 furnace and AC replacement permits in the last 12 months and the middle firm filed 7 in the whole file. Line them up on the same public measures: permits filed, share of permits finished and usual filed job value. Pick what matters to you and the list re-orders, for example recent activity if you need someone soon. The order comes from the permit record only, and nobody pays to be listed or to move up.
23 firms filed at least one furnace and AC replacement permit on homes in the City of Bismarck from October 2023 to September 2026; 19 of them filed one in the last 12 months.
We have not matched license records to Bismarck firms, so ask for the license number and check it yourself with North Dakota Secretary of State contractor search. How to check a contractor's license in North Dakota →
Three you can check against this page: “How many furnace and AC replacement permits have you filed in Bismarck?” (the middle firm here filed 7; 19 of 23 filed one in the last 12 months); “What value will you put on the permit?” (the usual filed value here is $4,435); “Will you pull the permit in your company’s name, and when is the final inspection?” (25% of older furnace and AC replacement permits here were finished). All 10 questions and how to check each →
On this page: 23 firms filed 2,098 furnace and AC replacement permits from October 2023 to September 2026, and each firm’s name opens its own permit record. Every number comes from City of Bismarck TRAKiT building, mechanical, electrical and plumbing permits on homes. To see one permit itself, search the address or permit number with the Bismarck permit office. How the records work in Bismarck →
We do not rate or collect reviews. Instead each of the 23 HVAC contractors here is shown with its permit record: 2,098 permits, the share finished and usual filed value. Read reviews on other sites and use this page to check them against the record. Reviews vs permit records →
Every number on this page comes from City of Bismarck TRAKiT building, mechanical, electrical and plumbing permits on homes: 23 firms filed 2,098 furnace and AC replacement permits on homes in the City of Bismarck from October 2023 to September 2026, and 19 of them filed one in the last 12 months. The middle firm has 7 permits in the whole file. A short record leaves more uncertainty, and some jobs never require a permit.
The middle recorded permit value is $4,435. That is a filed estimate, not a quote or final bill. See how we compare records.
Most Bismarck furnace and AC replacement permits are filed in July (125 against an average month of 100); March is the quietest (68). When each trade is busiest in Bismarck →