Dunstable at a glance
603 inspects an elevated radon result at the property, then writes the route to a system designed to reduce radon entry. The town record below supplies location context only; it does not diagnose the home.

Published facts for Dunstable
| Census geography | Dunstable, Middlesex County subdivision |
|---|---|
| Median year built | 1986 |
| Occupied units | 1,135 |
| Owner occupied | 1,089 (96%) |
| Total housing units | 1,167 |
| Single-unit detached | 1,125 (96%) |
| Population | 3,375 |
What those figures can establish
The Census record identifies the municipal geography, the release year, and seven published values. It lets a reviewer reproduce the Dunstable context from tables B25035, B25003, B25024, and B01003. It does not describe the inspected basement, foundation, slab, crawl space, equipment, or test result.
Ownership stays unassigned
Of 1,135 occupied units, 1,089 are owner-occupied and 46 fall in the remaining occupied category. That 96% owner share is a town statistic. At the job, 603 still confirms the customer, owner, tenant, manager, or association roles before work is approved.
Structure type stays unassigned
The ACS counts 1,125 single-unit detached structures and 42 units in other structure categories out of 1,167 total units. The 96% share cannot label this building. The site plan records the actual footprint and any shared areas.
Age stays unassigned
The townwide median year is 1986; it is not a construction date. Plans, permits, invoices, photographs, equipment labels, and visible material transitions create the useful timeline for the Dunstable property.
Population stays out of the diagnosis
The published population is 3,375. It cannot predict demand, scheduling, travel time, or a lower-level condition. The address, access route, measured work, and current calendar determine serviceability.
The Dunstable diagnostic sequence
1. Anchor the test record
Save the device location, dates, conditions, and result. A mitigation design begins with a traceable measurement rather than a remembered number. On the Dunstable worksheet, the source anchor 1,986 remains in the context column while the property observation receives its own photograph, location, and status.
2. Map every pressure field
Draw the original slab, additions, crawl sections, sumps, and candidate suction points. Field diagnostics determine whether those footprints communicate. On the Dunstable worksheet, the source anchor 1,135 remains in the context column while the property observation receives its own photograph, location, and status.
3. Choose a buildable fan route
Place the fan, power source, pipe, windows, occupied outdoor areas, roof edge, and exhaust termination on the same elevation sketch. On the Dunstable worksheet, the source anchor 1,125 remains in the context column while the property observation receives its own photograph, location, and status.
4. Plan verification and service
Identify the system monitor and follow-up test, and keep the fan and labeled pipe accessible. The scope is intended to reduce radon, not promise one final reading. On the Dunstable worksheet, the source anchor 3,375 remains in the context column while the property observation receives its own photograph, location, and status.
Records to place beside the measurements
A useful Dunstable appointment includes more than a verbal history. The homeowner can gather dated photographs, earlier proposals, invoices, permits, plans, equipment labels, and test reports, then identify which document belongs to which room or system. The crew should photograph the reported problem and a normal reference area, using fixed corners, openings, utilities, or equipment as repeatable labels. Any addition or earlier lower-level renovation needs its own line on the sketch. The municipal values 1986, 1,135, 1,125, and 3,375 remain in the context box; none replaces a date, measurement, photograph, or record from this property. Before pricing, the parties should also identify who can authorize work, the daily access route, protected household areas, parking or storage limits, and any third party who controls utilities or shared space.
Three legitimate outcomes from the visit
Proceed with a defined project
The observed finding, measured boundary, buildable route, responsibilities, and intended result support a complete radon mitigation proposal. Quantities and locations appear in writing before scheduling.
Narrow the response
The inspection may support a smaller correction, a monitoring point, maintenance to existing equipment, or another test rather than the broad project first imagined. The reduced answer should explain what evidence changed the boundary.
Pause before construction
If access is blocked, ownership is unclear, a concealed section controls the decision, or the measurements conflict with the reported timeline, 603 can leave the condition open. The next step should name the missing record, opening, test, or approval instead of burying uncertainty inside an allowance.
A 603 radon mitigation field example

How the written scope is assembled
Finding
The proposal begins with the observed condition and the homeowner timeline. Concealed areas remain marked unknown unless the owner approves an opening or another test.
Installation
The drawing identifies the suction point, fan, sealed penetrations, pressure field, exhaust route, electrical connection, and system monitor. It places those elements beside measured quantities, access, preparation, and the order of work.
Responsibility
The document separates 603 work, homeowner preparation, third-party work, permits, electrical coordination, and finish restoration. A changed condition is photographed and priced before the boundary expands.
Closeout
The crew returns to the starting photographs and labels. Installed components, service access, operation, exclusions, and items left for monitoring remain visible at the final walkthrough.
Budget and warranty
The present 603 planning range is $900 to $6,000, with most systems between $1,950 and $2,250. The final Dunstable amount follows the measured design, access, preparation, equipment, quantities, and restoration, not the municipal table.
Qualifying work carries a 10-year warranty on the mitigation system and its components. The written terms identify the treated area, covered components, required conditions, and exclusions.
Another view of the work

Questions before approval
What warranty applies?
603 provides a 10-year warranty on the mitigation system and its components.
Does 603 guarantee a particular radon number?
No. The system is designed and installed to reduce radon, but a specific final reading is not guaranteed.
Can one fan serve an addition and the original slab?
Only when field testing shows the suction field communicates across those footprints. The plan should not assume it.
Request a Dunstable property inspection
603 will document the finding, the proposed boundary, price, responsibilities, and exclusions before work is scheduled.
Continue with 603
- Radon Mitigation service overview
- radon testing
- radon mitigation systems
- understanding a radon result
- 603 service areas
Sources: U.S. Census Bureau 2023 ACS 5-year tables B25035, B25003, B25024, and B01003. The town photograph links to its Wikimedia Commons source and license. 603 supplied service, pricing, warranty, and work-image information.
Common questions about radon
- Radon was a big deal 30 years ago. Is it still something New England homeowners need to test for and fix?
- The radon test at the home we are buying came back high (6.8). Is it a dealbreaker, and can it be fixed?
- What are the potential risks of being exposed to high levels of radon?
- What are the signs of radon under a house, other than a high test result?
- What is a mitigation system for radon?
- What is a radon test?
- What is the major source of radiation in our homes?
- What mask should I use to filter radon while installing a fan
- What should you do if you find radon in your home?
- What was your radon level before and after the mitigation system?
- Why are rain gutters sometimes used for radon mitigation systems?
- Why is radon more prominent in homes?